Howtosignalprocessing
What is Shannon theorem in cryptography?
Shannon's Theory (contd.) cryptogram is the same as that of the key without the cryptogram. For perfect ciphers, the key size is infinite if the message size is infinite. – however if a shorter key size is used then the cipher can be attacked by someone with infinite computational power.
What is secrecy in cryptography?
In cryptography, forward secrecy (FS), also known as perfect forward secrecy (PFS), is a feature of specific key agreement protocols that gives assurances that session keys will not be compromised even if long-term secrets used in the session key exchange are compromised.
What is key equivocation?
Key equivocation H(K∣C): amount of uncertainty of. the key that remains after observing the ciphertext.
