资料介绍
PN序列产生-讲义Guang Gong Dept. Electrical and Computer Engineering
Design of Pseudo-random Sequence Generators (Cont.)
Lecture 2: n Design of PRSGs Towards Large Linear Span n Applications in Stream Cipher Design: A5 and w7
Lecture 2
@ G. Gong
1
3. Design of PRSGs Towards Large Linear Span
One-time-pad and Design Principles of Stream Ciphers Known Approaches for Design of PRSG Based on LFSR
Lecture 2
@ G. Gong
2
Cryptanalyst
^ c ^ k
Message source
m
Encrypter
c
Decrypter
Destination
k
Secure channel
Key generator
Model of Conventional Cryptosystem
Lecture 2 @ G. Gong 3
Model of Stream Cipher
Message source
m = m1, m2, ...
Cipher
c = c1 , c2, ... + k = k1, k2, ...
Key generation
K, seed
Lecture 2
@ G. Gong
4
One-time-pad
One-time-pad means that different messages are e
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