MODERN CRYPTOGRAPHY

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Protecting Keys (Storage or Distribution) • Physical security – Tamper Resistant Security Module (TRSM) – Tokens (Smart Cards) • Components – Secret Sharing Scheme • Key hierarchies – Keys encrypted using other keys – Lower level keys derived from higher level ones IMA 2009 10
Side Channel Attacks To find a cryptographic key • Brute force attacks try to find the secret key by random trial and error • Side channel attacks try to use additional information drawn from the physical implementation of the cryptographic algorithm at hand so as to be substantially better than trial and error IMA 2009 11
Page 1 and 2: MODERN CRYPTOGRAPHY Fred Piper Code
Page 3 and 4: “Many cryptographic systems rely
Page 5 and 6: Two Types of Cipher System • Conv
Page 7 and 8: Cryptographic System • Design alg
Page 9: Implementing Cryptographic Algorith
Page 13 and 14: Side Channel Attacks • Changed th
Page 15 and 16: Enigma Machine • Polyalphabetic c
Page 17 and 18: Lessons from Bletchley Park? • In
Page 19 and 20: Use of Cryptography Service • Con
Page 21 and 22: What is Cryptography Now? • A thr
Page 23 and 24: Cryptographic conjectures made in 1
Page 25 and 26: Key Search for DES 56 bit key requi
Page 27 and 28: DES: Key Search on Internet (1997)
Page 29 and 30: Fast DES Key Search DES Breaker use
Page 31 and 32: User Authentication and Data Integr
Page 33 and 34: Attacks on Scheme Implementing RSA
Page 35 and 36: RSA: The Theory (1) n = pq where p,
Page 37 and 38: RSA Security Problem The theoretica
Page 39 and 40: RSA Implementation RSA involves com
Page 41 and 42: Saints or Sinners ? Sender Receiver
Page 43: Cryptography and You • SSL • AT

MODERN CRYPTOGRAPHY

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