Advantage of crypto bit?

Imran Ghory imranghory at
Fri May 20 17:02:22 PDT 2005

On 5/21/05, Tom H <hellfrozeover at> wrote:
> For the signature, does anyone know what the advantage is in doing...
> BASE64(DSA(SHA1("[timestamp]::assert_identity::[identity_url]::[return_url]::[nonce]")))
> over simply...
> SHA1("[timestamp]::assert_identity::[identity_url]::[return_url]::[nonce]")?

SHA1 is simply an hash algorithm so anyone can generate
it basically takes that information and compacts it into a smaller
form. DSA is a signing algorithm so the id-server can "sign" the 
output of SHA1 thus guaranteeing that the id-server produced it.


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