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Why SHA-2 instead of RSA 4096 or SHA-256? Even the RSA is compromised but 4096-bit will take a lot more(maybe few more hours) resources to decrypt.

==edited==

Thank you for the reply.



SHA-256 is one of SHA-2's hash functions: http://en.wikipedia.org/wiki/SHA-2


SHA-256 is a form of SHA-2.


You use a hash function (e.g. SHA256) to make the hash of the page and a signature algorithm (like RSA 4096) to sign it.




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