Proof of claim made in Lecture 1_亚博娱乐官网_亚博pt手机客户端登录

haakja
2020-08-26T06:39:20.473Z
type:structured-message
www.uio.no

In Lecture 1 I made the claim that no symmetric encryption scheme can have perfect privacy (one-time or otherwise) if the key space is smaller than the message space. In this note I provide a proof of this claim.