[VPM] checksum hash questions

[abez]

http://en.wikipedia.org/wiki/SHA256

Use SHA256 for your fingerprint, Bruce Shneider recommends it.

> can a file checksum hash, differ if a char is changed in a text file, even 
> though the length of the file/string is still the same?

Your idea of what a string is obviously differs from mine. What
characters can be changed that are the same? You can always filter out
certain characters you don't like before you generate a hash.

abram


On Wed, 13 Sep 2006, Jer A wrote:

> hello all
> 
> I am a newbie in the following area:
> 
> these are not really perl questions, but I think some of you would have an 
> answer:)
> 
> can a file checksum hash, differ if a char is changed in a text file, even 
> though the length of the file/string is still the same?
> 
> how long does it take to create a checksum hash of a text file that is only 
> about 1KB?
> 
> what type of checksum hash would you recommend that meets speed and genuine 
> file-fingerprinting.
> 
> Thanks in advance for all your help.
> 
> Jeremy A.
> 
> 
> _______________________________________________
> Victoria-pm mailing list
> Victoria-pm at pm.org
> http://mail.pm.org/mailman/listinfo/victoria-pm
> 

-- 
abez ------------------------------------------
http://www.abez.ca/ Abram Hindle (abez at abez.ca)
------------------------------------------ abez