Cryptography. Dr. Michael Schneider October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 1
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1 Cryptography Dr. Michael Schneider October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 1
2 1 Formalities 2 Contents, Time Table 3 Literature 4 Announcements October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 2
3 1 Formalities 2 Contents, Time Table 3 Literature 4 Announcements October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 3
4 General Remarks 1 Elective module in Master of Computer Science / JIM / Dual Master / Master of Data Science: Catalogue: Theoretical Aspects of Informatics SWH: 2 lecture + 1 lab + 1 exercise 6 ECTS 2 Time schedule of lecture: Tuesday, 16:00-17:30 Lecture hall D14/403 Start: Tuesday, Who is Michael Schneider? michael.schneider@h-da.de 4 All infos about the lecture can be found here: October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 4
5 Module Description October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 5
6 x-y-scheme (x = white y = grey) October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 6
7 Exercises 1 Every second Tuesday, 17:45-19:15 2 Lecture hall: D14/403 3 Voluntary participation (preparation and participation is strongly recommended) exercises (x-weeks) (white): : 1st exercise : 2nd exercise : 3rd exercise : 4th exercise : 5th exercise October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 7
8 Lab 1 Every (second) Tuesday, 17:45-19:15 (y) / 14:15-15:45 (x) 2 Lecture hall: D14/403 3 You have to pass all labs!!! 4 Starting October 24 (x-group) 5 5 labs: Please check the OBS for the dates October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 8
9 Exam Registration deadline Deregistration deadline Examination date - Thursday, Examination time - 12:00-13:30 Room will be anounced later You need to have passed all 5 labs! October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 9
10 Attendance Register You need to attend the first lecture Otherwise your seat is given to someone on the waiting list Reasonable exceptions are possible October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 10
11 1 Formalities 2 Contents, Time Table 3 Literature 4 Announcements October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 11
12 Contents (1/5) Security goals and cryptographic techniques Security goals Historical ciphers Modern symmetric cryptographic schemes Asymmetric cryptography: A sketch of RSA Models for evaluating security Unconditional security, computational security,... Attacker models on encryption schemes October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 12
13 Contents (2/5) A sketch of probability theory and Shannon s theorem Basic facts Conditional probabilities Perfect secrecy Shannon s theorem Entropy considerations Definition Properties Joint and conditional entropies October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 13
14 Contents (3/5) Birthday problems Hash functions and their requirements in cryptography Application fields Security requirements Basic design principles (Merkle-Damgård, Sponge) SHA-1 SHA-3: Keccak October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 14
15 Contents (4/5) Pseudo random number generators Random numbers Pseudo random numbers Stream ciphers Basic properties RC4 October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 15
16 Contents (5/5) A sketch of elliptic curve cryptography Finite fields Elliptic curves over finite fields and their use in cryptography Fundamentals of quantum cryptography Schrödinger s equation Quantum key exchange due to Bennet and Brassard Shor s algorithm to factorize integers and compute discrete logarithms October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 16
17 Time Table (1/3) : Chapter 0: Formalities and Contents Chapter 1: Security Goals and Cryptographic Techniques : Chapter 2: Historical ciphers and modern symmetric schemes : Chapter 3: A Sketch of RSA and Signatures : Public Holiday - no lecture October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 17
18 Time Table (2/3) : Chapter 4: Security and Attacker Models : Chapter 5: Probability Theory and Shannon s Theorem : Chapter 6: An Introduction to Entropy : Chapter 7: Birthday Problems and Hash Functions : Chapter 8: Merkle-Damgård Principle for Hash Functions and SHA-1 October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 18
19 Time Table (3/3) : Chapter 9: Sponge and Keccak : Chapter 10: Pseudorandom Bit Generators and Stream Ciphers : Chapter 11: Publik Key Infrastructures : Chapter 12: An Introduction to ECC and (P)QC October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 19
20 1 Formalities 2 Contents, Time Table 3 Literature 4 Announcements October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 20
21 Literature A. Menezes, P. van Oorschoot, S. Vanstone Handbook of Applied Cryptography CRC Press, 1997 Single chapters available via WWW from Nigel Smart Cryptography. An Introduction Mcgraw-Hill Professional, 2002 October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 21
22 Literature Bruce Schneier Applied Cryptography John Wiley & Sons, 1995 Johannes Buchmann Introduction to Cryptography Springer, 2004 October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 22
23 Literature Christof Paar, Jan Pelzl Understanding Cryptography Springer, 2001 October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 23
24 1 Formalities 2 Contents, Time Table 3 Literature 4 Announcements October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 24
25 Topics for Master Theses (h_da and TUD) 1 Biometrics and Internet Security Research Group da/sec: 2 Contact Michael Schneider: michael.schneider@h-da.de or after lecture October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 25
26 Lecture Sources Most images are taken from Slides of Alexander Wiesmaier (WS 2016/17) and Harald Baier (WS 2015/16) Thanks a lot! October 10, 2017 h_da WS2017/18 Security Protocols Dr. Michael Schneider 26
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