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bio website stackoverflow.com/users/3474
location United States
age 44
visits member for 3 years, 1 month
seen Oct 10 at 12:31

Jun
4
comment If RSA is limited to 117-200 bytes or so, is that a very limited use case?
@user1361315 Exactly.
Mar
5
comment Should the secret key of Shamir's secret-sharing algorithm be interpreted byte by byte?
I would also note that there have been some protocols suggested for avoiding attacks by malicious shareholders, where they try to get other share-holders' keys but withhold their own, but I haven't seen any that are bullet-proof. Maybe you could digitally sign shares when they are issued?
Mar
5
comment Should the secret key of Shamir's secret-sharing algorithm be interpreted byte by byte?
I don't know a lot about it either, so I will offer my opinion (based on having implemented SSS myself) rather than trying to give a real answer: I think that the reason bytes are commonly used in practice is that hard-coding the exponentiation and logarithm tables that are needed is easy, fast, and compact. However, it does limit the number of shares. If you are able to use a "big integer" library to compute the necessary powers and logarithms at runtime, it seems like performance would be adequate for a lot practical applications.
Mar
5
comment Should the secret key of Shamir's secret-sharing algorithm be interpreted byte by byte?
A shareholder can tamper with bytes, but not larger integers? I don't understand the point of your question.
Aug
2
comment Aes encryption -The relevance of static matrix in mixcolumns operation
Not a programming problem. Flagged to move to crypto.