Shannon’s Model of Cryptography

• Assume that the only secrets are P, Ke, and Kd

• Te(Ke,P)=C and Td(Kd,C)=P

• H(Ke) large, H(Kd) large, H(C) large

• Relationship of P to C obscure

Te

Td

Ke

Kd

P

P

C

Encryption

Decryption

Previous slide

Next slide

Back to first slide

View graphic version