Crypto systems generally don't fail gracefully, by even slightly changing the algorithm, or choosing special init values the results are not really applicable t

Crypto systems generally don't fail gracefully, by even slightly changing the algorithm, or choosing special init values the results are not really applicable to an unmodified version. There are however known issues with real SHA1 which is why it's not recommended for future development. http://blogs.technet.com/b/srd/archive/2013/11/12/security-advisory-2880823-recommendation-to-discontinue-use-of-sha-1.aspx http://blogs.technet.com/b/srd/archive/2013/11/12/security-a...