10-27-2012
Hi fpmurphy. Thanks for the input. You wouldn't by chance know what happens when you calculate your keys from really small prime numbers and then try encrypting data blocks larger than the keys would you? Cause the math is not working out for me. When I calculate it by hand with a calculator program the decrypted data is not the same as what was encrytped.
---------- Post updated at 11:15 AM ---------- Previous update was at 10:17 AM ----------
Nevermind guys, I found the answer to my question. The answer can be summed up in this sentence from a professor at Purdue:
"Since our message integer M must be smaller than the modulus n, obviously our
block size cannot equal the modulus size."
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LEARN ABOUT HPUX
setkey_r
crypt(3C) crypt(3C)
NAME
crypt - generate hashing encryption
SYNOPSIS
Obsolescent Interfaces
DESCRIPTION
crypt():
is the password encryption function. It is based on a one way hashing encryption algorithm with variations intended (among other things)
to frustrate use of hardware implementations of a key search.
key is a user's typed password. salt is a two-character string chosen from the set this string is used to perturb the hashing algorithm in
one of 4096 different ways, after which the password is used as the key to encrypt repeatedly a constant string. The returned value points
to the encrypted password. The first two characters are the salt itself.
Obsolescent Interfaces
generate hashing encryption.
WARNINGS
The return value for points to data whose content is overwritten by each call.
and are obsolescent interfaces supported only for compatibility with existing DCE applications. New multithreaded applications should use
SEE ALSO
crypt(1), login(1), passwd(1), getpass(3C), passwd(4), thread_safety(5).
STANDARDS CONFORMANCE
crypt(3C)