Charles Babbage and deciphering codes (1864) (mathshistory.st-andrews.ac.uk)

Very interesting to read Babbage’s thoughts on cryptanalysis of a cipher. I wish we could have read his thoughts on modern ciphers and what he would think of them.

For anyone who enjoys this topic and an entertaining read, there's The Difference Engine by William Gibson: https://www.goodreads.com/book/show/337116.The_Difference_En...