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Apr
14
comment Value of S and r in Fiat-Shamir Protocol
Note that the original 1988 paper says "Choose k random numbers $S_1 ..... S_k$ in $Z_n$" (p. 86)
Sep
17
comment Encryption with data loss protection
Perhaps it's not what you need, but you may be interested in locality sensitive hashing -- it's what Google uses to identify identical web pages, even where there's slight difference in HTML content (different ads, etc.). It's been a while since I've looked at LSH, but I think it allows the recipient to calculate the distance of their copy of the book from the original book.
Aug
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Feb
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awarded  Yearling
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Jan
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revised HMAC for short messages
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revised HMAC for short messages
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Jan
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answered HMAC for short messages
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Feb
23
accepted Can I secure my key by XORing it with a hashed password?
Feb
23
asked Can I secure my key by XORing it with a hashed password?