ESP Egocentric Social Platform
|
|
- Roger Dean
- 5 years ago
- Views:
Transcription
1 ESP Egocentric Social Platform T. J. Purtell, Ian Vo, Monica S. Lam With: Kanak Biscuitwala, Willem Bult, Dan Boneh, Ben Dodson, Steve Fan, and Frank Wang,
2 Global Social Platforms Ideal for Meeting strangers Stalking people Discovering long lost hook-ups Marketing Hosting lots of personal pictures for free Laboring in the virtual world to avoid real work EULA for most networks Provider owns everything you post.
3 Egocentric Social Platforms Ideal for Sharing freely I am not going to be at my home which is at Ridge Way for 2 weeks Maintaining boundaries Mixing Work + Friends = Work Rules Quantified Self Apps Social Finance and Health Apps Limited global internet connectivity Arab spring, natural disaster, 3 rd world
4 Mobile First Always on Often connected Always with you
5 Direct Connection DENIED! Friend is offline can t send a message. Friend is on 3G NAT doesn t work. Friend is at work firewall blocked it. The cloud and phones must BUFFER.
6 Separation of Concerns Break the system into parts Allow consumer choice for those parts Better competition, better evolution Choice must not be HARD
7 The Split Identity Use existing providers; already have accounts Short-term data Notification/message routing Temporary Blobs Long-term data Backup services
8 An OS Service Connecting people to run apps is the next evolution of smart device platforms. ESP is the backend for Musubi Social ACLs embedded with encrypted data OS (Musubi for now) handles smart messaging
9 Social Primitives - Identity 1. Establish an Identity 2. Connect with Friends 3. Short Push Messaging 4. Large Pull Messaging
10 Everything Encrypted Friends need to exchange public keys Original Musubi generated an RSA key pair on install No way to message someone unless they are already a user No way to reuse existing phone address book
11 IBC to the Rescue What if the address, Facebook ID, etc is the public key? Public key would exist before a user installs. Private key allows users to prove their identity P2P
12 Identity-Based Cryptography Shamir invented using the address as the public key for signatures in Encryption of a message to a person using their address as the public key went unsolved... Boneh and Franklin accomplished this in 2001 using elliptic curve pairings (Weil).
13 IBC: Server derives the private key The public keys are all well-known and there are public parameters for the IBC server. Any client can check a signature or encrypt a message to someone without talking to the server. To sign or decrypt a message you need the private key.
14 IBC: Identity Based Cryptography public parameters Verify Decrypt
15 IBC: Revocation Implicit time based revocation in IBC. Private key is tied to a specific time frame Stolen private key = only lose control of data sent during that time frame Lost private key = just request it again
16 Identities and Friends Solved with IBC + Mobile phone address book Can communicate P2P with trust Ideal : OAuth provider offers IBC key service Today: Stanford hosts a generic IBC for Gmail+FB+
17 Improved Revocation IBC automatically expires keys Every message includes implicit revocation Check authorization token at start for revocation through existing mechanisms
18 Social Primitives - Data 1. Establish an Identity 2. Connect with Friends 3. Short Push Messaging 4. Large Pull Messaging
19 Protecting Data Messages encrypted with AES Social ACL attached hashed identities IBC encrypted secrets Encryption enforces ACL Servers can apply it at a higher level ACL serves as routing information
20 Message Routing IP : Identity Each device has a message queue Identity is a fan out to multiple devices Frequently used groups can be fan outs Messages buffered to stable storage
21 Adapted AMQP Queue A stream of messages buffered persistently until consumed Exchange A destination for a message that rebroadcasts it to other exchanges or queues
22 Large Pull Messaging Small messages ideal for push HD quality is still needed Push a thumbnail with a pointer to a large blob of data Other devices download the full copy lazily
23 ESP Architecture All data are encrypted outside the mobile device
24 First Time Flow
25 Activate an Existing Identity
26 Contact a Friend for the 1 st Time
27 Responding to the 1 st Message
28 Evaluation
29 IBC and Mobile Device Performance An IBC operation takes a second! Use cached AES key between a pair of individuals Embedded in social ACL Protected by IBC Update the pair key when either identity expires On average 15 days
30 Message Format
31 Social Behavior Models IBC Expiration: 1 month Facebook Twitter Contextual # senders 229 friends 100 followings 20 friends # recipients 229 friends 10,000 followers 20 friends # posts / day ,000 # msgs received / sender / day ,000 msg length 50 KBytes 4 KBytes 4KBytes
32 Sending Costs r: # receivers s: # senders t: Expiration period (1 month) m s : Messages sent Operation CPU Time (m s ) Frequency Compute channel key 78 2 s / t Sign encrypted channel key s / t Load cached channel key 0.58 m s * r SHA256 of message headers r m s SHA256 of message body l m s AES encrypt secret block 0.78 m s * r AES encrypt message body 0.42 l m s * r
33 Receiving Costs r: # receivers m r : Messages received t: Expiration period (1 month) Operation CPU Time (m r ) Frequency Check user signature s / t Decrypt channel key s / t Load cached channel key 0.59 m r AES decrypt secret block 0.85 m r AES decrypt message body 0.43 l m r SHA256 of message headers r m r SHA256 of message body l m r
34 Cost for Network Types Simulated Network Min Latency Size Overhead (in bytes) % CPU Send % CPU Receive Facebook 360 ms 59, % 0.7% Contextual 74 ms 5, % 5.6% Twitter 14 s 2,589, % 5.4%
35 Future ESP messaging deployed in Musubi for Android Work on big blobs and real-time sessions is ongoing What apps need full ESP access vs. Musubi firewalled social access? Standards
36 Conclusion Attack the open SNS problem with crypto Make the services required dead simple Smarts on the devices They can handle it ESP is the basis for a compelling platform
DISPATCH: SECURE MOBILE JOURNALISM
DISPATCH: SECURE MOBILE JOURNALISM Kanak Biscuitwala*, Willem Bult*, Mathias Lécuyer**, T. J. Purtell*, Madeline Ross**, Augustin Chaintreau**, Chris Haseman***, Monica Lam*, Susan McGregor** Stanford
More informationWhatsApp Encryption Overview. Technical white paper
WhatsApp Encryption Overview Technical white paper July 6, 2017 Originally published April 5, 2016 Contents Introduction................................... 3 Terms......................................
More informationDiffie-Hellman. Part 1 Cryptography 136
Diffie-Hellman Part 1 Cryptography 136 Diffie-Hellman Invented by Williamson (GCHQ) and, independently, by D and H (Stanford) A key exchange algorithm o Used to establish a shared symmetric key Not for
More informationeduvpn François Kooman
eduvpn François Kooman @fkooman Enschede, 2018-02-09 Me Software Developer (PHP, C) Freelancer traveling around Europe Used to work for SURFnet Now: lead developer eduvpn / Let s Connect!
More informationCryptography and Network Security. Sixth Edition by William Stallings
Cryptography and Network Security Sixth Edition by William Stallings Chapter 13 Digital Signatures To guard against the baneful influence exerted by strangers is therefore an elementary dictate of savage
More informationSalesforce1 Mobile Security White Paper. Revised: April 2014
Salesforce1 Mobile Security White Paper Revised: April 2014 Table of Contents Introduction Salesforce1 Architecture Overview Authorization and Permissions Communication Security Authentication OAuth Pairing
More informationSecurity+ Guide to Network Security Fundamentals, Third Edition. Chapter 11 Basic Cryptography
Security+ Guide to Network Security Fundamentals, Third Edition Chapter 11 Basic Cryptography Objectives Define cryptography Describe hashing List the basic symmetric cryptographic algorithms 2 Objectives
More informationTungsten Security Whitepaper
Tungsten Labs UG (haftungsbeschränkt) Email: contact@tungsten-labs.com Web: http://tungsten-labs.com Monbijouplatz 5, 10178 Berlin Tungsten Security Whitepaper Berlin, May 2018 Version 1 Contents Introduction
More informationEncryption. INST 346, Section 0201 April 3, 2018
Encryption INST 346, Section 0201 April 3, 2018 Goals for Today Symmetric Key Encryption Public Key Encryption Certificate Authorities Secure Sockets Layer Simple encryption scheme substitution cipher:
More informationCriptext s end-to-end encryption system. Technical white paper
Criptext s end-to-end encryption system Technical white paper Contents Introduction 3 Sending Emails 7 Terms 4 Sending Attachments 8 Client Registration Initiating Session Setup 5 Linking new devices 9
More informationMidterm II December 4 th, 2006 CS162: Operating Systems and Systems Programming
Fall 2006 University of California, Berkeley College of Engineering Computer Science Division EECS John Kubiatowicz Midterm II December 4 th, 2006 CS162: Operating Systems and Systems Programming Your
More informationUses of Cryptography
Uses of Cryptography What can we use cryptography for? Lots of things Secrecy Authentication Prevention of alteration Page 1 Cryptography and Secrecy Pretty obvious Only those knowing the proper keys can
More informationThe case for ubiquitous transport-level encryption
1/25 The case for ubiquitous transport-level encryption Andrea Bittau, Michael Hamburg, Mark Handley, David Mazières, and Dan Boneh Stanford and UCL November 18, 2010 Goals 2/25 What would it take to encrypt
More informationSecurity: Cryptography
Security: Cryptography Computer Science and Engineering College of Engineering The Ohio State University Lecture 38 Some High-Level Goals Confidentiality Non-authorized users have limited access Integrity
More information1.264 Lecture 28. Cryptography: Asymmetric keys
1.264 Lecture 28 Cryptography: Asymmetric keys Next class: Anderson chapters 20. Exercise due before class (Reading doesn t cover same topics as lecture) 1 Asymmetric or public key encryption Receiver
More informationSpring 2010: CS419 Computer Security
Spring 2010: CS419 Computer Security MAC, HMAC, Hash functions and DSA Vinod Ganapathy Lecture 6 Message Authentication message authentication is concerned with: protecting the integrity of a message validating
More informationPretty Good Privacy (PGP
PGP - S/MIME - Internet Firewalls for Trusted System: Roles of Firewalls Firewall related terminology- Types of Firewalls - Firewall designs - SET for E-Commerce Transactions. Pretty Good Privacy (PGP
More information(a) Symmetric model (b) Cryptography (c) Cryptanalysis (d) Steganography
Code No: RR410504 Set No. 1 1. Write short notes on (a) Symmetric model (b) Cryptography (c) Cryptanalysis (d) Steganography 3. (a) Illustrate Diffie-hellman Key Exchange scheme for GF(P) [6M] (b) Consider
More informationAllNet: Ubiquitous Interpersonal Communication
AllNet: Ubiquitous Interpersonal Communication Edoardo Biagioni University of Hawaii at Mãnoa esb@hawaii.edu Basic Idea The radio in my cellphone can talk to the radio in your cellphone There is no software
More informationPKI Credentialing Handbook
PKI Credentialing Handbook Contents Introduction...3 Dissecting PKI...4 Components of PKI...6 Digital certificates... 6 Public and private keys... 7 Smart cards... 8 Certificate Authority (CA)... 10 Key
More informationRef:
Cryptography & digital signature Dec. 2013 Ref: http://cis.poly.edu/~ross/ 2 Cryptography Overview Symmetric Key Cryptography Public Key Cryptography Message integrity and digital signatures References:
More informationCryptographic Concepts
Outline Identify the different types of cryptography Learn about current cryptographic methods Chapter #23: Cryptography Understand how cryptography is applied for security Given a scenario, utilize general
More informationCrypto meets Web Security: Certificates and SSL/TLS
CSE 484 / CSE M 584: Computer Security and Privacy Crypto meets Web Security: Certificates and SSL/TLS Spring 2016 Franziska (Franzi) Roesner franzi@cs.washington.edu Thanks to Dan Boneh, Dieter Gollmann,
More informationOverview. SSL Cryptography Overview CHAPTER 1
CHAPTER 1 Secure Sockets Layer (SSL) is an application-level protocol that provides encryption technology for the Internet. SSL ensures the secure transmission of data between a client and a server through
More informationComputer Security. 08r. Pre-exam 2 Last-minute Review Cryptography. Paul Krzyzanowski. Rutgers University. Spring 2018
Computer Security 08r. Pre-exam 2 Last-minute Review Cryptography Paul Krzyzanowski Rutgers University Spring 2018 March 26, 2018 CS 419 2018 Paul Krzyzanowski 1 Cryptographic Systems March 26, 2018 CS
More informationChapter 8 Security. Computer Networking: A Top Down Approach. 6 th edition Jim Kurose, Keith Ross Addison-Wesley March 2012
Chapter 8 Security A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you see the animations; and can add,
More informationKurose & Ross, Chapters (5 th ed.)
Kurose & Ross, Chapters 8.2-8.3 (5 th ed.) Slides adapted from: J. Kurose & K. Ross \ Computer Networking: A Top Down Approach (5 th ed.) Addison-Wesley, April 2009. Copyright 1996-2010, J.F Kurose and
More informationParallelizing Cryptography. Gordon Werner Samantha Kenyon
Parallelizing Cryptography Gordon Werner Samantha Kenyon Outline Security requirements Cryptographic Primitives Block Cipher Parallelization of current Standards AES RSA Elliptic Curve Cryptographic Attacks
More informationKey Exchange. Secure Software Systems
1 Key Exchange 2 Challenge Exchanging Keys &!"#h%&'() & & 1 2 6(6 1) 2 15! $ The more parties in communication, the more keys that need to be securely exchanged " # Do we have to use out-of-band methods?
More informationCryptography III. Public-Key Cryptography Digital Signatures. 2/1/18 Cryptography III
Cryptography III Public-Key Cryptography Digital Signatures 2/1/18 Cryptography III 1 Public Key Cryptography 2/1/18 Cryptography III 2 Key pair Public key: shared with everyone Secret key: kept secret,
More informationViber Encryption Overview
Introduction Terms Preparations for Session Setup Secure Session Setup Exchanging Messages Encrypted Calls Photo, Video and File Sharing Secure Groups Secondary Device Registration Authentication Viber
More informationProtecting Your Data With Encryption
Protecting Your Data With Encryption Ed Leighton-Dick Kingfisher Technologies Thank you Sponsors! o Please visit the sponsors during the vendor break from 2:45 3:15 and enter their end-of-day raffles Event
More informationDistributed Systems. 26. Cryptographic Systems: An Introduction. Paul Krzyzanowski. Rutgers University. Fall 2015
Distributed Systems 26. Cryptographic Systems: An Introduction Paul Krzyzanowski Rutgers University Fall 2015 1 Cryptography Security Cryptography may be a component of a secure system Adding cryptography
More informationCS 111. Operating Systems Peter Reiher
Security for Operating Systems: Cryptography, Authentication, and Protecting OS Resources Operating Systems Peter Reiher Page 1 Outline Basic concepts in computer security Design principles for security
More informationSECURITY STORY WE NEVER SEE, TOUCH NOR HOLD YOUR DATA
SECURITY STORY WE NEVER SEE, TOUCH NOR HOLD YOUR DATA CTO Office www.digi.me another Engineering Briefing digi.me keeping your data secure at all times ALL YOUR DATA IN ONE PLACE TO SHARE WITH PEOPLE WHO
More informationIntroduction to Network Security Missouri S&T University CPE 5420 Data Integrity Algorithms
Introduction to Network Security Missouri S&T University CPE 5420 Data Integrity Algorithms Egemen K. Çetinkaya Egemen K. Çetinkaya Department of Electrical & Computer Engineering Missouri University of
More informationOn the Internet, nobody knows you re a dog.
On the Internet, nobody knows you re a dog. THREATS TO DISTRIBUTED APPLICATIONS 1 Jane Q. Public Big Bank client s How do I know I am connecting to my bank? server s Maybe an attacker...... sends you phishing
More informationTest Conditions. Closed book, closed notes, no calculator, no laptop just brains 75 minutes. Steven M. Bellovin October 19,
Test Conditions Closed book, closed notes, no calculator, no laptop just brains 75 minutes Steven M. Bellovin October 19, 2005 1 Form 8 questions I m not asking you to write programs or even pseudo-code
More informationCloud FastPath: Highly Secure Data Transfer
Cloud FastPath: Highly Secure Data Transfer Tervela helps companies move large volumes of sensitive data safely and securely over network distances great and small. Tervela has been creating high performance
More informationח'/סיון/תשע "א. RSA: getting ready. Public Key Cryptography. Public key cryptography. Public key encryption algorithms
Public Key Cryptography Kurose & Ross, Chapters 8.28.3 (5 th ed.) Slides adapted from: J. Kurose & K. Ross \ Computer Networking: A Top Down Approach (5 th ed.) AddisonWesley, April 2009. Copyright 19962010,
More informationNigori: Storing Secrets in the Cloud. Ben Laurie
Nigori: Storing Secrets in the Cloud Ben Laurie (benl@google.com) April 23, 2013 1 Introduction Secure login is something we would clearly like, but achieving it practically for the majority users turns
More informationThe most important development from the work on public-key cryptography is the digital signature. Message authentication protects two parties who
1 The most important development from the work on public-key cryptography is the digital signature. Message authentication protects two parties who exchange messages from any third party. However, it does
More informationCisco Live /11/2016
1 Cisco Live 2016 2 3 4 Connection Hijacking - prevents the authentication happening and then an attacker jumping in during the keyexchange messaging 5 6 7 8 9 Main Mode - (spoofing attack) DH performed
More informationCSE 127: Computer Security Cryptography. Kirill Levchenko
CSE 127: Computer Security Cryptography Kirill Levchenko October 24, 2017 Motivation Two parties want to communicate securely Secrecy: No one else can read messages Integrity: messages cannot be modified
More informationDocument Sub Title. Yotpo. Technical Overview 07/18/ Yotpo
Document Sub Title Yotpo Technical Overview 07/18/2016 2015 Yotpo Contents Introduction... 3 Yotpo Architecture... 4 Yotpo Back Office (or B2B)... 4 Yotpo On-Site Presence... 4 Technologies... 5 Real-Time
More informationCryptography: Practice JMU Cyber Defense Boot Camp
Cryptography: Practice 2013 JMU Cyber Defense Boot Camp Prerequisites This unit assumes that you have already known Symmetric-key encryption Public-key encryption Digital signature Digital certificates
More informationSecureDoc Disk Encryption Cryptographic Engine
SecureDoc Disk Encryption Cryptographic Engine Security Policy Abstract: This document specifies Security Policy enforced by the SecureDoc Cryptographic Engine compliant with the requirements of FIPS 140-2
More informationFirewalls, Tunnels, and Network Intrusion Detection
Firewalls, Tunnels, and Network Intrusion Detection 1 Firewalls A firewall is an integrated collection of security measures designed to prevent unauthorized electronic access to a networked computer system.
More informationLecture Nov. 21 st 2006 Dan Wendlandt ISP D ISP B ISP C ISP A. Bob. Alice. Denial-of-Service. Password Cracking. Traffic.
15-441 Lecture Nov. 21 st 2006 Dan Wendlandt Worms & Viruses Phishing End-host impersonation Denial-of-Service Route Hijacks Traffic modification Spyware Trojan Horse Password Cracking IP Spoofing DNS
More informationL13. Reviews. Rocky K. C. Chang, April 10, 2015
L13. Reviews Rocky K. C. Chang, April 10, 2015 1 Foci of this course Understand the 3 fundamental cryptographic functions and how they are used in network security. Understand the main elements in securing
More informationSecurity. Communication security. System Security
Security Communication security security of data channel typical assumption: adversary has access to the physical link over which data is transmitted cryptographic separation is necessary System Security
More informationPYTHIA SERVICE BY VIRGIL SECURITY WHITE PAPER
PYTHIA SERVICE WHITEPAPER BY VIRGIL SECURITY WHITE PAPER May 21, 2018 CONTENTS Introduction 2 How does Pythia solve these problems? 3 Are there any other solutions? 4 What is Pythia? 4 How does it work?
More informationAuthentication CHAPTER 17
Authentication CHAPTER 17 Authentication Authentication is the process by which you decide that someone is who they say they are and therefore permitted to access the requested resources. getting entrance
More informationDistributed Systems. 25. Authentication Paul Krzyzanowski. Rutgers University. Fall 2018
Distributed Systems 25. Authentication Paul Krzyzanowski Rutgers University Fall 2018 2018 Paul Krzyzanowski 1 Authentication For a user (or process): Establish & verify identity Then decide whether to
More informationChapter 8 Network Security
Chapter 8 Network Security A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you can add, modify, and
More informationKey Management. Digital signatures: classical and public key Classic and Public Key exchange. Handwritten Signature
Key Management Digital signatures: classical and public key Classic and Public Key exchange 1 Handwritten Signature Used everyday in a letter, on a check, sign a contract A signature on a signed paper
More informationTHIS IS AN OPEN BOOK, OPEN NOTES QUIZ.
Department of Electrical Engineering and Computer Science MASSACHUSETTS INSTITUTE OF TECHNOLOGY 6.033 Computer Systems Engineering: Spring 2002 Handout 31 - Quiz 2 All problems on this quiz are multiple-choice
More informationPublic-Key Infrastructure NETS E2008
Public-Key Infrastructure NETS E2008 Many slides from Vitaly Shmatikov, UT Austin slide 1 Authenticity of Public Keys? private key Alice Bob public key Problem: How does Alice know that the public key
More informationHTTPS is Fast and Hassle-free with Cloudflare
HTTPS is Fast and Hassle-free with Cloudflare 1 888 99 FLARE enterprise@cloudflare.com www.cloudflare.com In the past, organizations had to choose between performance and security when encrypting their
More informationDigital signatures: How it s done in PDF
Digital signatures: How it s done in PDF Agenda Why do we need digital signatures? Basic concepts applied to PDF Digital signatures and document workflow Long term validation Why do we need digital signatures?
More informationLecture 9a: Secure Sockets Layer (SSL) March, 2004
Internet and Intranet Protocols and Applications Lecture 9a: Secure Sockets Layer (SSL) March, 2004 Arthur Goldberg Computer Science Department New York University artg@cs.nyu.edu Security Achieved by
More informationCS November 2018
Authentication Distributed Systems 25. Authentication For a user (or process): Establish & verify identity Then decide whether to allow access to resources (= authorization) Paul Krzyzanowski Rutgers University
More informationImplementing Cryptography: Good Theory vs. Bad Practice
Implementing Cryptography: Good Theory vs. Bad Practice Viet Pham Information Security Group, Department of Mathematics Royal Holloway, University of London Outline News report What is cryptography? Why
More informationBCA III Network security and Cryptography Examination-2016 Model Paper 1
Time: 3hrs BCA III Network security and Cryptography Examination-2016 Model Paper 1 M.M:50 The question paper contains 40 multiple choice questions with four choices and student will have to pick the correct
More informationMore on Cryptography CS 136 Computer Security Peter Reiher January 19, 2017
More on Cryptography CS 136 Computer Security Peter Reiher January 19, 2017 Page 1 Outline Desirable characteristics of ciphers Stream and block ciphers Cryptographic modes Uses of cryptography Symmetric
More informationPass, No Record: An Android Password Manager
Pass, No Record: An Android Password Manager Alex Konradi, Samuel Yeom December 4, 2015 Abstract Pass, No Record is an Android password manager that allows users to securely retrieve passwords from a server
More information9/30/2016. Cryptography Basics. Outline. Encryption/Decryption. Cryptanalysis. Caesar Cipher. Mono-Alphabetic Ciphers
Cryptography Basics IT443 Network Security Administration Slides courtesy of Bo Sheng Basic concepts in cryptography systems Secret cryptography Public cryptography 1 2 Encryption/Decryption Cryptanalysis
More informationGeoPal: Friend Spam Detection in Social Networks with Private Location Proofs
GeoPal: Friend Spam Detection in Social Networks with Private Location Proofs Bogdan Carbunar, Mizanur Rahman, Mozhgan Azimpourkivi, Debra Davis Florida International University carbunar@cs.fiu.edu Social
More informationCS 5114 Network Programming Languages Data Plane. Nate Foster Cornell University Spring 2013
CS 5114 Network Programming Languages Data Plane http://www.flickr.com/photos/rofi/2097239111/ Nate Foster Cornell University Spring 2013 Based on lecture notes by Jennifer Rexford and Michael Freedman
More informationtcpcrypt: real transport-level encryption Andrea Bittau, Mike Hamburg, Mark Handley, David Mazieres, Dan Boneh. UCL and Stanford.
tcpcrypt: real transport-level encryption Andrea Bittau, Mike Hamburg, Mark Handley, David Mazieres, Dan Boneh. UCL and Stanford. What would it take to encrypt the vast majority of TCP traffic? Performance
More informationCryptography Basics. IT443 Network Security Administration Slides courtesy of Bo Sheng
Cryptography Basics IT443 Network Security Administration Slides courtesy of Bo Sheng 1 Outline Basic concepts in cryptography systems Secret key cryptography Public key cryptography Hash functions 2 Encryption/Decryption
More informationDeveloping Enterprise Cloud Solutions with Azure
Developing Enterprise Cloud Solutions with Azure Java Focused 5 Day Course AUDIENCE FORMAT Developers and Software Architects Instructor-led with hands-on labs LEVEL 300 COURSE DESCRIPTION This course
More informationA SIMPLE INTRODUCTION TO TOR
A SIMPLE INTRODUCTION TO TOR The Onion Router Fabrizio d'amore May 2015 Tor 2 Privacy on Public Networks Internet is designed as a public network Wi-Fi access points, network routers see all traffic that
More informationStanford University Computer Science Department CS 240 Sample Quiz 2 Questions Winter February 25, 2005
Stanford University Computer Science Department CS 240 Sample Quiz 2 Questions Winter 2005 February 25, 2005 These were from open-book exams. In general you had 50 minutes to answer 8-10 out of 10-12 questions.
More informationSicherheitsaspekte für Flashing Over The Air in Fahrzeugen. Axel Freiwald 1/2017
Sicherheitsaspekte für Flashing Over The Air in Fahrzeugen Axel Freiwald 1/2017 All OEMs Will Implement Software OTA As Soon As Possible IHS Study Motivation: Save on recalls caused by software bugs Evolution
More informationCryptography Functions
Cryptography Functions Lecture 3 1/29/2013 References: Chapter 2-3 Network Security: Private Communication in a Public World, Kaufman, Perlman, Speciner Types of Cryptographic Functions Secret (Symmetric)
More informationBUILDING A NEXT-GENERATION FIREWALL
How to Add Network Intelligence, Security, and Speed While Getting to Market Faster INNOVATORS START HERE. EXECUTIVE SUMMARY Your clients are on the front line of cyberspace and they need your help. Faced
More informationDecentralised Communication: The challenge of balancing interoperability and privacy.
Decentralised Communication: The challenge of balancing interoperability and privacy. matthew@matrix.org http://www.matrix.org Privacy in Matrix 2 Two basic types of privacy: 1. Can attackers see what
More informationKey Protection for Endpoint, Cloud and Data Center
Key Protection for Endpoint, Cloud and Data Center ENCRYPTION IS ONLY AS SECURE AS ITS LEAST SECURE KEY Encryption is undoubtedly one of the pillars of information security. It is used everywhere today:
More informationUSER MANUAL FOR SECURE E MAIL MICROSOFT OUTLOOK (2003)
YATANARPON TELEPORT COMPANY LTD., YATANARPON CERTIFICATION AUTHORITY USER MANUAL FOR SECURE E MAIL MICROSOFT OUTLOOK (2003) Yatanarpon Teleport Company Ltd., Hlaing Universities Campus, Hlaing Township,
More informationDistributed Social Network in Browsers. Yang Ji Michael Puckett
Distributed Social Network in Browsers Yang Ji Michael Puckett Problem Large scale personal data abuse and manipulation raises question to the cloud based architecture in social networks. Sensitive personal
More informationTinySec: A Link Layer Security Architecture for Wireless Sensor Networks. Presented by Paul Ruggieri
TinySec: A Link Layer Security Architecture for Wireless Sensor Networks Chris Karlof, Naveen Sastry,, David Wagner Presented by Paul Ruggieri 1 Introduction What is TinySec? Link-layer security architecture
More informationSoftware Vulnerability Assessment & Secure Storage
Software Vulnerability Assessment & Secure Storage 1 Software Vulnerability Assessment Vulnerability assessment is the process of identifying flaws that reside in an OS, application software or devices
More informationEncryption Algorithms Authentication Protocols Message Integrity Protocols Key Distribution Firewalls
Security Outline Encryption Algorithms Authentication Protocols Message Integrity Protocols Key Distribution Firewalls Overview Cryptography functions Secret key (e.g., DES) Public key (e.g., RSA) Message
More informationTHIRD PARTY AUDITING FOR SECURE DATA STORAGE IN CLOUD THROUGH DIGITAL SIGNATURE USING RSA
THIRD PARTY AUDITING FOR SECURE DATA STORAGE IN CLOUD THROUGH DIGITAL SIGNATURE USING RSA ABSTRACT K.Govinda #1, V.Gurunathaprasad #2, H.Sathishkumar #3 Cloud computing is the way of providing computing
More informationJunos Security. Chapter 8: IPsec VPNs Juniper Networks, Inc. All rights reserved. Worldwide Education Services
Junos Security Chapter 8: IPsec VPNs 2012 Juniper Networks, Inc. All rights reserved. www.juniper.net Worldwide Education Services Chapter Objectives After successfully completing this chapter, you will
More informationIntroduction to Cryptography and Security Mechanisms: Unit 5. Public-Key Encryption
Introduction to Cryptography and Security Mechanisms: Unit 5 Public-Key Encryption Learning Outcomes Explain the basic principles behind public-key cryptography Recognise the fundamental problems that
More informationPersonal Internet Security Basics. Dan Ficker Twin Cities DrupalCamp 2018
Personal Internet Security Basics Dan Ficker Twin Cities DrupalCamp 2018 Overview Security is an aspiration, not a state. Encryption is your friend. Passwords are very important. Make a back-up plan. About
More informationNetwork Security - ISA 656 IPsec IPsec Key Management (IKE)
Network Security - ISA 656 IPsec IPsec (IKE) Angelos Stavrou September 28, 2008 What is IPsec, and Why? What is IPsec, and Why? History IPsec Structure Packet Layout Header (AH) AH Layout Encapsulating
More informationArchitectural Support for Copy and Tamper Resistant Software
Architectural Support for Copy and Tamper Resistant Software David Lie, Chandu Thekkath, Mark Mitchell, Patrick Lincoln, Dan Boneh, John Mitchell and Mark Horowitz Computer Systems Laboratory Stanford
More informationSSL/TLS & 3D Secure. CS 470 Introduction to Applied Cryptography. Ali Aydın Selçuk. CS470, A.A.Selçuk SSL/TLS & 3DSec 1
SSL/TLS & 3D Secure CS 470 Introduction to Applied Cryptography Ali Aydın Selçuk CS470, A.A.Selçuk SSL/TLS & 3DSec 1 SSLv2 Brief History of SSL/TLS Released in 1995 with Netscape 1.1 Key generation algorithm
More informationIssues. Separation of. Distributed system security. Security services. Security policies. Security mechanism
Module 9 - Security Issues Separation of Security policies Precise definition of which entities in the system can take what actions Security mechanism Means of enforcing that policy Distributed system
More informationSieve: Cryptographically Enforced Access Control for User Data in Untrusted Clouds
Sieve: Cryptographically Enforced Access Control for User Data in Untrusted Clouds Frank Wang (MIT CSAIL), James Mickens (Harvard), Nickolai Zeldovich (MIT CSAIL), Vinod Vaikuntanathan (MIT CSAIL) 1 Motivation
More informationRSA and ECDSA. Geoff Huston APNIC. #apricot2017
RSA and ECDSA Geoff Huston APNIC It s all about Cryptography Why use Cryptography? Public key cryptography can be used in a number of ways: protecting a session from third party eavesdroppers Encryption
More informationPyNaCl Release 1.0 Oct 31, 2017
PyNaCl Release 1.0 Oct 31, 2017 Contents 1 Contents 1 1.1 Public Key Encryption.......................................... 1 1.2 Secret Key Encryption.......................................... 4 1.3 Digital
More informationSecurity Fundamentals
COMP 150-IDS: Internet Scale Distributed Systems (Spring 2015) Security Fundamentals Noah Mendelsohn Tufts University Email: noah@cs.tufts.edu Web: http://www.cs.tufts.edu/~noah Copyright 2012 & 2015 Noah
More informationDreamFactory Security Guide
DreamFactory Security Guide This white paper is designed to provide security information about DreamFactory. The sections below discuss the inherently secure characteristics of the platform and the explicit
More informationChapter 4: Securing TCP connections
Managing and Securing Computer Networks Guy Leduc Chapter 5: Securing TCP connections Computer Networking: A Top Down Approach, 6 th edition. Jim Kurose, Keith Ross Addison-Wesley, March 2012. (section
More informationIEEE Std and IEEE Std 1363a Ashley Butterworth Apple Inc.
apple IEEE Std 1363-2000 and IEEE Std 1363a-2004 Ashley Butterworth Apple Inc. The Titles IEEE Std 1363-2000 - IEEE Standard Specifications for Public-Key Cryptography IEED Std 1363a-2004 - IEEE Standard
More informationCryptography for Software and Web Developers
Cryptography for Software and Web Developers Part 4: randomness, hashing, tokens Hanno Böck 2014-05-28 1 / 13 Bad random numbers Random fails Example: Factoring RSA keys Good / bad randomness In security
More information