Unformatted text preview: random numbers a, b ∈ Z p1 respectively, and then send each other g a mod p , g b mod p . (a) What is the secret key which is exchanged between Alice and Bob? g ab mod p . (b) What is the public key of the Di±eHellman cryptosystem? p, g, g a mod p, g b mod p . (c) What is the private key of the Di±eHellman cryptosystem? Either a (Alice uses this) or b (Bob uses this) . 3. The OneTime Pad. Encryption: • given a plaintext: 000000000 • and the key 011010101 • what is the ciphertext? 011010101 Decryption: • given a ciphertext: 011001101 • and the key 011010101 • recover the plaintext? 000011001 Mike Burmester...
View
Full Document
 Fall '09
 Cryptography, Computer Security, hash function, Alice, Cryptographic hash function, resistant) function.

Click to edit the document details