Mon Jul 7 22:30:01 2003
On Mon Jul 07 2003; 16:19, CL Gilbert wrote:
> What is the hash algorithm for, or what is the hash itself for? And why
The hash algorithm is used to calculate the message digest over the
data. It's like a digital fingerprint which is unique. It is used
during the signing and verification process.
> do I have several choices? Is one better or preferred for a particular
> situation or reason?
You have several choices because some algorithms MUST use a special
hash algorithm. For example the DSS prescribes SHA-1 as the message
But if you use RSA you are free to chose RMD-160 or SHA-1 or even MD5.
It's up to you to select one. RMD-160 and SHA-1 do not have any known
weaknesses so it's a personal preference.
Windows Privacy Tools "Der Tugendhafte begnügt sich, von dem zu
(http://winpt.sourceforge.net) träumen, was der Böse im Leben verwirklicht."
OpenPGP Key 0xBF3DF9B4 -- Platon