MODERN CRYPTOGRAPHY

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How Does it Work? The CA certifies that Fred Piper’s public key is……….. Electronically signed by the CA The Certificate can accompany all Fred’s messages The recipient must directly or indirectly: • Trust the authority that issued the certificate (CA) • Validate the certificate IMA 2009 34
RSA: The Theory (1) n = pq where p,q are large primes Public key: (n,e) where (e,(p − 1)(q − 1)) = 1 Encryption: for 0 ≤ m ≤ n − 1 c = m e modn Secret key: d where ed = 1 mod(p − 1)(q − 1)) Decryption: m = c d modn IMA 2009 35
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 and 10: Implementing Cryptographic Algorith
Page 11 and 12: Side Channel Attacks To find a cryp
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: Attacks on Scheme Implementing RSA
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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