Pretty Good Privacy (PGP
|
|
|
- Mervin George
- 6 years ago
- Views:
Transcription
1 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
2 CS6004 CYBER FORENSICS NETWORK LAYER SECURITY TRANSPORT LAYER SECURITY IPSec Protocol IP Authentication Header SSL protocol Cryptographic Computations IP ESP TLS Protocol. Key Management Protocol for IPSec. 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 2/22
3 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 3/22
4 Stands for Pretty Good Privacy Developed by Phil Zimmerman in 1995 Documentation and source code is freely available. The package is independent of operating system and processor 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 4/22
5 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 5/22
6 PGP offers 5 services Authentication Confidentiality Compression compatibility Segmentation 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 6/22
7 Sender creates a message SHA-1 used to generate 160-bit hash code of message Hash code is encrypted with RSA using the sender's private key, and result is attached to message Receiver uses RSA or DSS with sender's public key to decrypt and recover hash code Receiver generates new hash code for message and compares with decrypted hash code, if match, message is accepted as authentic 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 7/22
8 Sender generates message and random 128-bit number to be used as session key for this message only Message is encrypted, using CAST-128 / IDEA/3DES with session key Session key is encrypted using RSA with recipient's public key, then attached to message Receiver uses RSA with its private key to decrypt and recover session key Session key is used to decrypt message 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 8/22
9 uses both services on same message Create signature & attach to message Encrypt both message & signature Attach RSA encrypted session key 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 9/22
10 PGP compresses message after signing but before encrypting so can store uncompressed message & signature for later verification & because compression is non deterministic uses ZIP compression algorithm 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 10/22
11 when using PGP will have binary data to send (encrypted message etc) however was designed only for text hence PGP must encode raw binary data into printable ASCII characters uses radix-64 algorithm maps 3 bytes to 4 printable chars also appends a CRC PGP also segments messages if too big 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 11/22
12 Consider the mapping of a 24-bit input (a block of three octets) into a four-character output consisting of the 8- bit set in the 32-bit block. Suppose the 24-bit raw text is: The hexadecimal representation of this text sequence is b /27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 12/22
13 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 13/22
14 Arranging this input sequence in blocks of 6 bits yields Extracted 6-bit decimal values 44, 38, 12, 41 Referring to Table, the radix-64 encoding of these decimal values produces the following characters smmp 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 14/22
15 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 15/22
16 Consider the encoding process from 8-bit input groups to the output character string in the radix-64 alphabet. Input raw text: 0x 15 d0 2f 9e b7 4c 8-bit octets bit index Decimal Output character R64 ASCII format (0x) F d A v n r d M e d Binary /27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 16/22
17 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 17/22
18 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 18/22
19 Public-Key Algorithms Symmetric-Key Algorithms Compression Algorithm Hash Algorithms 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 19/22
20 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 20/22
21 Consider the encoding process from 8-bit input groups to the output character string in the radix-64 alphabet. Input raw text: 0x 15 d0 2f 9e b7 Input raw text: 0x 15 d0 2f 9e 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 21/22
22 1/27/2017 A.Aruna / CS6303 / Arithmetic Logical Unit 22/22
Princess Nora Bint Abdulrahman University College of computer and information sciences Networks department Networks Security (NET 536)
Princess Nora Bint Abdulrahman University College of computer and information sciences Networks department Networks Security (NET 536) Prepared by Dr. Samia Chelloug E-mail: samia_chelloug@yahoo.fr Content
Pretty Good Privacy (PGP)
Pretty Good Privacy (PGP) -- PGP services -- PGP key management (c) Levente Buttyán (buttyan@crysys.hu) What is PGP? general purpose application to protect (encrypt and/or sign) files can be used to protect
Summary of PGP Services
Table 15.1 Summary of PGP Services Function Algorithms Used Description Digital signature Message encryption Compression Email compatibility DSS/SHA or RSA/SHA CAST or IDEA or Three-key Triple DES with
Cryptography and Network Security. Sixth Edition by William Stallings
Cryptography and Network Security Sixth Edition by William Stallings Chapter 19 Electronic Mail Security Despite the refusal of VADM Poindexter and LtCol North to appear, the Board's access to other sources
Cryptography and Network Security
Cryptography and Network Security Third Edition by William Stallings Lecture slides by Lawrie Brown Chapter 15 Electronic Mail Security Despite the refusal of VADM Poindexter and LtCol North to appear,
CS 356 Internet Security Protocols. Fall 2013
CS 356 Internet Security Protocols Fall 2013 Review Chapter 1: Basic Concepts and Terminology Chapter 2: Basic Cryptographic Tools Chapter 3 User Authentication Chapter 4 Access Control Lists Chapter 5
Chapter 32 Security in the Internet: IPSec, SSL/TLS, PGP,
Chapter 32 Security in the Internet: IPSec, SSL/TLS, PGP, VPN, and Firewalls 32.1 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 32.2 Figure 32.1 Common structure
Chapter 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
Chapter 5 Electronic mail security
Chapter 5 Electronic mail security Dr. BHARGAVI H. GOSWAMI Department of Computer Science Christ University +91 9426669020 bhargavigoswami@gmail.com Topic List 1. Pretty good privacy 2. S/MIME Pretty Good
Lecture 4: Cryptography III; Security. Course Administration
Lecture 4: Cryptography III; Email Security CS 336/536: Computer Network Security Fall 2014 Nitesh Saxena Course Administration HW/Lab 1 Posted Due at 11am on Sep 29 Labs are active starting this week
VALLIAMMAI ENGINEERING COLLEGE SRM Nagar, Kattankulathur
VALLIAMMAI ENGINEERING COLLEGE SRM Nagar, Kattankulathur 603 203. DEPARTMENT OF COMPUTER SCIENCE AND ENGINEERING QUESTION BANK VII SEMESTER CS 6004 CYBER FORENSICS Regulation 2013 Academic Year 2017 2018
BCA 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
Sankalchand Patel College of Engineering, Visnagar Department of Computer Engineering & Information Technology. Question Bank
Sankalchand Patel College of Engineering, Visnagar Department of Computer Engineering & Information Technology Question Bank Subject: Information Security (160702) Class: BE Sem. VI (CE/IT) Unit-1: Conventional
IPSec. Slides by Vitaly Shmatikov UT Austin. slide 1
IPSec Slides by Vitaly Shmatikov UT Austin slide 1 TCP/IP Example slide 2 IP Security Issues Eavesdropping Modification of packets in transit Identity spoofing (forged source IP addresses) Denial of service
14. Internet Security (J. Kurose)
14. Internet Security (J. Kurose) 1 Network security Foundations: what is security? cryptography authentication message integrity key distribution and certification Security in practice: application layer:
ECE 646 Lecture 4A. Pretty Good Privacy PGP. Short History of PGP based on the book Crypto by Steven Levy. Required Reading
ECE 646 Lecture 4A Pretty Good Privacy PGP Required Reading Stallings, Cryptography and Network Security: Principles and Practice, 5/E or 6/E Chapter 18.1 or 19.1 Pretty Good Privacy (PGP) On-line Chapters
Pretty Good Privacy PGP. Required Reading. Stallings, Cryptography and Network Security: Principles and Practice, 5/E or 6/E
ECE 646 Lecture 4 Pretty Good Privacy PGP Required Reading Stallings, Cryptography and Network Security: Principles and Practice, 5/E or 6/E Chapter 18.1 or 19.1 Pretty Good Privacy (PGP) On-line Chapters
Principles of Information Security, Fourth Edition. Chapter 8 Cryptography
Principles of Information Security, Fourth Edition Chapter 8 Cryptography Learning Objectives Upon completion of this material, you should be able to: Chronicle the most significant events and discoveries
ECE 646 Lecture 4. Pretty Good Privacy PGP
ECE 646 Lecture 4 Pretty Good Privacy PGP Required Reading Stallings, Cryptography and Network Security: Principles and Practice, 6/E or 7/E Chapter 19.1 Pretty Good Privacy (PGP) On-line Chapters (available
Network Encryption Methods
Network Encryption Network Encryption Methods CSC362, Information Security Objectives understanding the impact of employing encryption at different protocol layers application layer encryption transport
Computer Networking. What is network security? Chapter 7: Network security. Symmetric key cryptography. The language of cryptography
Chapter 7: Network security 15-441 Computer Networking Network Security: Cryptography, Authentication, Integrity Foundations: what is security? cryptography authentication message integrity key distribution
Security+ 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
Ralph Durkee Independent Consultant Security Consulting, Security Training, Systems Administration, and Software Development
Ralph Durkee Independent Consultant www.rd1.net Security Consulting, Security Training, Systems Administration, and Software Development PGP and GnuPG Rochester OWASP Agenda: Generic Public Key Encryption
Chapter 8. Network Security. Cryptography. Need for Security. An Introduction to Cryptography 10/7/2010
Cryptography Chapter 8 Network Security Introduction to Cryptography Substitution Ciphers Transposition Ciphers One-Time Pads Two Fundamental Cryptographic Principles Need for Security An Introduction
Gestion et sécurité des réseaux informatiques. Guy Leduc. Chapter 3: Securing applications. Chapter goals: security in practice:
Gestion et sécurité des réseaux informatiques Guy Leduc Chapter 3: Securing applications Computer Networking: A Top Down Approach, 4 th edition. Jim Kurose, Keith Ross Addison-Wesley, July 2007. (section
Introduction and Overview. Why CSCI 454/554?
Introduction and Overview CSCI 454/554 Why CSCI 454/554? Get Credits and Graduate Security is important More job opportunities More research funds 1 Workload Five homework assignments Two exams (open book
Electronic mail security
Electronic mail security Ola Flygt Växjö University, Sweden http://w3.msi.vxu.se/users/ofl/ Ola.Flygt@vxu.se +46 470 70 86 49 1 Outline Pretty Good Privacy (PGP) S/MIME 2 1 Pretty Good Privacy Philip R.
Acronyms. International Organization for Standardization International Telecommunication Union ITU Telecommunication Standardization Sector
Acronyms 3DES AES AH ANSI CBC CESG CFB CMAC CRT DoS DEA DES DoS DSA DSS ECB ECC ECDSA ESP FIPS IAB IETF IP IPsec ISO ITU ITU-T Triple DES Advanced Encryption Standard Authentication Header American National
CRYPTOGRAPHY AND NETWROK SECURITY-QUESTION BANK
CRYPTOGRAPHY AND NETWROK SECURITY-QUESTION BANK UNIT-1 1. Answer the following: a. What is Non-repudiation b. Distinguish between stream and block ciphers c. List out the problems of one time pad d. Define
APNIC elearning: Cryptography Basics
APNIC elearning: Cryptography Basics 27 MAY 2015 03:00 PM AEST Brisbane (UTC+10) Issue Date: Revision: Introduction Presenter Sheryl Hermoso Training Officer sheryl@apnic.net Specialties: Network Security
Chapter 8 Web Security
Chapter 8 Web Security Web security includes three parts: security of server, security of client, and network traffic security between a browser and a server. Security of server and security of client
Chapter 8. Network Security. Need for Security. An Introduction to Cryptography. Transposition Ciphers One-Time Pads
Cryptography p y Chapter 8 Network Security Introduction to Cryptography Substitution Ciphers Transposition Ciphers One-Time Pads Two Fundamental Cryptographic Principles Need for Security An Introduction
Key management. Pretty Good Privacy
ECE 646 - Lecture 4 Key management Pretty Good Privacy Using the same key for multiple messages M 1 M 2 M 3 M 4 M 5 time E K time C 1 C 2 C 3 C 4 C 5 1 Using Session Keys & Key Encryption Keys K 1 K 2
Int ernet w orking. Internet Security. Literature: Forouzan: TCP/IP Protocol Suite : Ch 28
Int ernet w orking Internet Security Literature: Forouzan: TCP/IP Protocol Suite : Ch 28 Internet Security Internet security is difficult Internet protocols were not originally designed for security The
Chapter 3: Securing applications
Managing and Securing Computer Networks Guy Leduc Chapter 4: Securing applications Computer Networking: A Top Down Approach, 7 th edition. Jim Kurose, Keith Ross AddisonWesley, April 2016. (section 8.5)
SRI VENKATESWARA COLLEGE OF ENGINEERING
COURSE DELIVERY PLAN - THEORY Page 1 of 6 Department of Information Technology B.E/B.Tech :IT/CS Regulation:2013 LP: CS6701 Rev. No: 01 Date: 30.06.2017 Sub. Code / Sub. Name : CS6701 CRYPTOGRAPHY & NETWORK
A New Symmetric Key Algorithm for Modern Cryptography Rupesh Kumar 1 Sanjay Patel 2 Purushottam Patel 3 Rakesh Patel 4
IJSRD - International Journal for Scientific Research & Development Vol. 2, Issue 08, 2014 ISSN (online): 2321-0613 A New Symmetric Key Algorithm for Modern Cryptography Rupesh Kumar 1 Sanjay Patel 2 Purushottam
Overview. 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
Data Communication Prof.A.Pal Dept of Computer Science & Engineering Indian Institute of Technology, Kharagpur Lecture - 40 Secured Communication - II
Data Communication Prof.A.Pal Dept of Computer Science & Engineering Indian Institute of Technology, Kharagpur Lecture - 40 Secured Communication - II Hello and welcome to today's lecture on secured communication.
Acronyms. International Organization for Standardization International Telecommunication Union ITU Telecommunication Standardization Sector
Acronyms 3DES AES AH ANSI CBC CESG CFB CMAC CRT DoS DEA DES DoS DSA DSS ECB ECC ECDSA ESP FIPS IAB IETF IP IPsec ISO ITU ITU-T Triple DES Advanced Encryption Standard Authentication Header American National
(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
Lecture 1: Introduction to Security Architecture. for. Open Systems Interconnection
Lecture 1: Introduction to Security Architecture for Open Systems Interconnection 1. Purpose of Document This document includes notes to guide the self-study of the students of the lectures on Network
CS669 Network Security
UNIT IV SECURITY PRACTICE Authentication applications Kerberos Kerberos Encryption Techniques PGP Radix64 IP Security Architecture Payload Key management Web security requirements SSL TLS SET Authentication
Kurose & 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
Security. 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
(2½ hours) Total Marks: 75
(2½ hours) Total Marks: 75 N. B.: (1) All questions are compulsory. (2) Makesuitable assumptions wherever necessary and state the assumptions made. (3) Answers to the same question must be written together.
CSC 6575: Internet Security Fall 2017
CSC 6575: Internet Security Fall 2017 Network Security Devices IP Security Mohammad Ashiqur Rahman Department of Computer Science College of Engineering Tennessee Tech University 2 IPSec Agenda Architecture
The question paper contains 40 multiple choice questions with four choices and students will have to pick the correct one (each carrying ½ marks.).
Time: 3hrs BCA III Network security and Cryptography Examination-2016 Model Paper 2 M.M:50 The question paper contains 40 multiple choice questions with four choices and students will have to pick the
Cryptography and secure channel. May 17, Networks and Security. Thibault Debatty. Outline. Cryptography. Public-key encryption
and secure channel May 17, 2018 1 / 45 1 2 3 4 5 2 / 45 Introduction Simplified model for and decryption key decryption key plain text X KE algorithm KD Y = E(KE, X ) decryption ciphertext algorithm X
The Research on PGP Private Key Ring Cracking and Its Application
The Research on PGP Private Key Ring Cracking and Its Application Xiaoyan Deng 1 *, Qingbing Ji 2, Lijun Zhang 3 1. College of Applied Mathematics,Chengdu University of Information Technology,Chengdu,
Lecture 20: PGP, IPSec, SSL/TLS, and Tor Protocols. Lecture Notes on Computer and Network Security. by Avi Kak
Lecture 20: PGP, IPSec, SSL/TLS, and Tor Protocols Lecture Notes on Computer and Network Security by Avi Kak (kak@purdue.edu) March 28, 2017 10:08am c 2017 Avinash Kak, Purdue University Goals: PGP: A
ח'/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,
CS 393 Network Security. Nasir Memon Polytechnic University Module 12 SSL
CS 393 Network Security Nasir Memon Polytechnic University Module 12 SSL Course Logistics HW 4 due today. HW 5 will be posted later today. Due in a week. Group homework. DoD Scholarships? NSF Scholarships?
Cryptography and Network Security
Cryptography and Network Security Spring 2012 http://users.abo.fi/ipetre/crypto/ Lecture 14: Folklore, Course summary, Exam requirements Ion Petre Department of IT, Åbo Akademi University 1 Folklore on
Chapter 6. IP Security. Dr. BHARGAVI H. GOSWAMI Department of Computer Science Christ University
Chapter 6 IP Security Dr. BHARGAVI H. GOSWAMI Department of Computer Science Christ University +91 9426669020 bhargavigoswami@gmail.com Topic List 1. IP Security Overview 2. IP Security Architecture 3.
Transport Level Security
2 Transport Level Security : Security and Cryptography Sirindhorn International Institute of Technology Thammasat University Prepared by Steven Gordon on 28 October 2013 css322y13s2l12, Steve/Courses/2013/s2/css322/lectures/transport.tex,
CYBER SECURITY MADE SIMPLE
CYBER SECURITY MADE SIMPLE Author: Christopher Gorog www.logiccentral.org www.newcyberfrontier.com Christopher Gorog, MBA, PMP, CISSP Lead Faculty for Cybersecurity at Colorado Technical University; Published
Internet and Intranet Protocols and Applications
Internet and Intranet Protocols and Applications Lecture 10: Internet and Network Security April 9, 2003 Arthur Goldberg Computer Science Department New York University artg@cs.nyu.edu What is network
IEEE 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
FTP. FTP offers many facilities :
FTP Given a reliable end-to-end trasport protocol like TCP, File Transfer might seem trivial. But, the details authorization, representation among heterogeneous machines make the protocol complex. FTP
Lecture 30. Cryptography. Symmetric Key Cryptography. Key Exchange. Advanced Encryption Standard (AES) DES. Security April 11, 2005
Lecture 30 Security April 11, 2005 Cryptography K A ciphertext Figure 7.3 goes here K B symmetric-key crypto: sender, receiver keys identical public-key crypto: encrypt key public, decrypt key secret Symmetric
CSE 3461/5461: Introduction to Computer Networking and Internet Technologies. Network Security. Presentation L
CS 3461/5461: Introduction to Computer Networking and Internet Technologies Network Security Study: 21.1 21.5 Kannan Srinivasan 11-27-2012 Security Attacks, Services and Mechanisms Security Attack: Any
1.264 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
Delineation of Trivial PGP Security
IOSR Journal of Computer Engineering (IOSR-JCE) e-issn: 2278-0661,p-ISSN: 2278-8727, Volume 20, Issue 3, Ver. I (May. - June. 2018), PP 17-23 www.iosrjournals.org Delineation of Trivial PGP Security Mr.
SECURITY IN NETWORKS 1
SECURITY IN NETWORKS 1 GOALS Understand principles of network security: Cryptography and its many uses beyond con dentiality Authentication Message integrity 2. 1 WHAT IS NETWORK SECURITY? Con dentiality:
Total No. of Questions : 09 ] [ Total No.of Pages : 02
![Total No. of Questions : 09 ] [ Total No.of Pages : 02](/thumbs/86/93170507.jpg "Total No. of Questions : 09 ] [ Total No.of Pages : 02")
CS / IT 321 (CR) Total No. of Questions : 09 ] [ Total No.of Pages : 02 III/IV B. TECH. DEGREE EXAMINATIONS, OCT / NOV - 2015 Second Semester COMPUTER SCIENCE & ENGINEERING NETWK SECURITY Time : Three
Lecture 33. Firewalls. Firewall Locations in the Network. Castle and Moat Analogy. Firewall Types. Firewall: Illustration. Security April 15, 2005
Firewalls Lecture 33 Security April 15, 2005 Idea: separate local network from the Internet Trusted hosts and networks Intranet Firewall DMZ Router Demilitarized Zone: publicly accessible servers and networks
Introduction to information Security
First lecture Introduction to information Security Why Computer and information Security Cryptography Secret key algorithms: DES/AES Public key algorithms: RSA One-way hash functions & message digests:
IP Security. Have a range of application specific security mechanisms
IP Security IP Security Have a range of application specific security mechanisms eg. S/MIME, PGP, Kerberos, SSL/HTTPS However there are security concerns that cut across protocol layers Would like security
Security in ECE Systems
Lecture 11 Information Security ECE 197SA Systems Appreciation Security in ECE Systems Information security Information can be very valuable Secure communication important to protect information Today
Computer Networks 1 (Mạng Máy Tính 1) Lectured by: Dr. Phạm Trần Vũ
Computer Networks 1 (Mạng Máy Tính 1) Lectured by: Dr. Phạm Trần Vũ Chapter 8 Network Security Computer Networking: A Top Down Approach, 5 th edition. Jim Kurose, Keith Ross Addison-Wesley, April 2009.
Network Security Chapter 8
Network Security Chapter 8 Cryptography Symmetric-Key Algorithms Public-Key Algorithms Digital Signatures Management of Public Keys Communication Security Authentication Protocols Email Security Web Security
VPN and IPsec. Network Administration Using Linux. Virtual Private Network and IPSec 04/2009
VPN and IPsec Network Administration Using Linux Virtual Private Network and IPSec 04/2009 What is VPN? VPN is an emulation of a private Wide Area Network (WAN) using shared or public IP facilities. A
Lecture 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
Cryptography and Network Security Chapter 16. Fourth Edition by William Stallings
Cryptography and Network Security Chapter 16 Fourth Edition by William Stallings Chapter 16 IP Security If a secret piece of news is divulged by a spy before the time is ripe, he must be put to death,
Protecting Information Assets - Week 11 - Cryptography, Public Key Encryption and Digital Signatures. MIS 5206 Protecting Information Assets
Protecting Information Assets - Week 11 - Cryptography, Public Key Encryption and Digital Signatures MIS5206 Week 11 Identity and Access Control Week 10 continued Cryptography, Public Key Encryption and
WHITE PAPER. Authentication and Encryption Design
WHITE PAPER Authentication and Encryption Design Table of Contents Introduction Applications and Services Account Creation Two-step Verification Authentication Passphrase Management Email Message Encryption
Digital Certificates Demystified
Digital Certificates Demystified Ross Cooper, CISSP IBM Corporation RACF/PKI Development Poughkeepsie, NY Email: rdc@us.ibm.com August 9 th, 2012 Session 11622 Agenda Cryptography What are Digital Certificates
Message authentication. Why message authentication. Authentication primitives. and secure hashing. To prevent against:
Message authentication and secure hashing Why message authentication To prevent against: Masquerade/impersonation Modification of message content Modification of message sequence Acceptance of replayed/delayed
Securing Communications
Securing Communications Overview Client/Server Authentication (Kerberos) Remote User Authentication Service (RADIUS) Public-Key Infrastructure (PKI) IP Layer Security (IPSec) Web Access Security (SSL)
Cryptography (Overview)
Cryptography (Overview) Some history Caesar cipher, rot13 substitution ciphers, etc. Enigma (Turing) Modern secret key cryptography DES, AES Public key cryptography RSA, digital signatures Cryptography
Using digital certificates in Microsoft Outlook
MANUAL Using digital certificates in Microsoft Outlook Version: 4.0 Date: 26.01.2018 103.14 KIBS AD Skopje 2018 KIBS AD Skopje, all rights reserved http://www.kibstrust.mk Table of Contents 1. Introduction
Applications FTP. FTP offers many facilities :
Applications FTP Given a reliable end-to-end trasport protocol like TCP, File Transfer might seem trivial. But, the details authorization, representation among heterogeneous machines make the protocol
Digital it Signatures. Message Authentication Codes. Message Hash. Security. COMP755 Advanced OS 1
Digital Signatures Digital it Signatures Offer similar protections as handwritten signatures in the real world. 1. Difficult to forge. 2. Easily verifiable. 3. Not deniable. 4. Easy to implement. 5. Differs
HP Instant Support Enterprise Edition (ISEE) Security overview
HP Instant Support Enterprise Edition (ISEE) Security overview Advanced Configuration A.03.50 Mike Brandon Interex 03 / 30, 2004 2003 Hewlett-Packard Development Company, L.P. The information contained
E-commerce security: SSL/TLS, SET and others. 4.2
E-commerce security: SSL/TLS, SET and others. 4.2 1 The need of authenticated payment SSL protects credit card details while they are transmitted through Internet but Why trust the Merchant? Once credit
Cryptography and Network Security Chapter 13. Digital Signatures & Authentication Protocols
Cryptography and Network Security Chapter 13 Digital Signatures & Authentication Protocols Digital Signatures have looked at message authentication but does not address issues of lack of trust digital
EEC-682/782 Computer Networks I
EEC-682/782 Computer Networks I Lecture 25 Wenbing Zhao wenbingz@gmail.com http://academic.csuohio.edu/zhao_w/teaching/eec682.htm (Lecture nodes are based on materials supplied by Dr. Louise Moser at UCSB
The Internet community has developed application-specific security mechanisms in a number of application areas, including electronic mail (S/MIME,
1 The Internet community has developed application-specific security mechanisms in a number of application areas, including electronic mail (S/MIME, PGP), client/server (Kerberos), Web access (Secure Sockets
Network Security. Chapter 8. MYcsvtu Notes.
Network Security Chapter 8 Network Security Some people who cause security problems and why. Cryptography Introduction Substitution ciphers Transposition ciphers One-time pads Fundamental cryptographic
Virtual Private Network
VPN and IPsec Virtual Private Network Creates a secure tunnel over a public network Client to firewall Router to router Firewall to firewall Uses the Internet as the public backbone to access a secure
Computer Security: Principles and Practice
Computer Security: Principles and Practice Chapter 2 Cryptographic Tools First Edition by William Stallings and Lawrie Brown Lecture slides by Lawrie Brown Cryptographic Tools cryptographic algorithms
Chapter 6/8. IP Security
Chapter 6/8 IP Security Prof. Bhargavi H Goswami Department of MCA, Sunshine Group of Institutes, Rajkot, Gujarat, India. Mob: +918140099018. Email: bhargavigoswami@gmail.com Topic List 1. IP Security
BS801E-BSCS. Cryptography
Jay-Ar Baliguat BS801E-BSCS Ms.Myrlen Maria Antoni Cryptography Cryptography can be defined as the conversion of data into a scrambled code that can be deciphered and sent across a public or private network.
Lesson 13 Securing Web Services (WS-Security, SAML)
Lesson 13 Securing Web Services (WS-Security, SAML) Service Oriented Architectures Module 2 - WS Security Unit 1 Auxiliary Protocols Ernesto Damiani Università di Milano element This element
10EC832: NETWORK SECURITY
10EC832: NETWORK SECURITY Objective: In this electronic age, security and privacy are two of the issues whose importance cannot be stressed enough. How do we ensure the systems we use are resistant to
06/02/ Local & Metropolitan Area Networks. 0. Overview. Terminology ACOE322. Lecture 8 Network Security
1 Local & Metropolitan Area Networks ACOE322 Lecture 8 Network Security Dr. L. Christofi 1 0. Overview As the knowledge of computer networking and protocols has become more widespread, so the threat of
Using PGP Encryption with Cornerstone MFT Server
2018 Using PGP Encryption with Cornerstone MFT Server Instructions for configuring and/or maintaining PGP in a Cornerstone MFT environment. QuickStart Guide 2018 South River Technologies, Inc. All Rights
APPLICATION LAYER APPLICATION LAYER : DNS, HTTP, , SMTP, Telnet, FTP, Security-PGP-SSH.
APPLICATION LAYER : DNS, HTTP, E-mail, SMTP, Telnet, FTP, Security-PGP-SSH. To identify an entity, the Internet used the IP address, which uniquely identifies the connection of a host to the Internet.
FIREWALLS & NETWORK SECURITY with Intrusion Detection and VPNs, 2
FIREWALLS & NETWORK SECURITY with Intrusion Detection and VPNs, 2 nd ed. 9 Encryption and Firewalls By Whitman, Mattord & Austin 2008 Course Technology Learning Objectives Describe the role encryption