i need a decoding algorithm of SHA-512?
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please suggest me... if decoding algorithm is not available then please tell me how can i decode the hash value generated by coding algorithm?
3 Comments
Walter Roberson
on 6 Jun 2013
This is a duplicate of http://www.mathworks.co.uk/matlabcentral/answers/77801-this-algorithm-to-generate-the-hash-value-using-text-character-my-name-is-saurabh-singh-how-i-can except without the code and with a minor bit more explanation.
Accepted Answer
Jan
on 6 Jun 2013
You cannot decode a hash. This is the purpose of hashes.
Note that a 512-bit hash is not unique, when it is calculated for a message with 513 or more bits.
8 Comments
Jan
on 7 Jun 2013
Edited: Jan
on 7 Jun 2013
Yes, even after relaoding the above comment is still there. Strange! So I try it again:
@Walter: Yes, you are right. My message is really too sloppy. A short message can be reconstructed from the hash, but this consumes much time and a brute-force-attack is a fair approach. But decoding is not the intention of hashes.
Using "purpose" as synonym for "not the intention" was not smart.
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