Some of the references I used for this section:
The Best Thing (TM):
1. Howard M. Heys, "A tutorial on linear and differential cryptanalysis", undated but probably 1999ish?
2. Abdalla and Bellare,
found via
That paper talks about differential/linear cryptanalysis and about the birthday paradox, saying block size $k$ needs to be rekeyed every $2^{k/2}$ blocks.
Bellare et al, A concrete security treatment of symmetric encryption:
analysis of the DES modes of operation
abstract from STOC 1997
full paper at
Focuses on DES, which was in the process of being superseded by AES even in 1997, but the content of the paper is valuable with respect to CBC. I found the paper a tough read when trying to figure out how to apply the equations.
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