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UNhash SHA String

Explorer ,
Nov 22, 2016 Nov 22, 2016

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Just a quick one. Is it possible to unhash / decrypt an SHA hashed field and if so how?

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LEGEND , Nov 22, 2016 Nov 22, 2016

If the value has been ENCRYPTED and the key known, it can be decrypted.  Obviously.

If the value has been HASHED, then that's another tale.  Hashing is supposed to be irreversible.  However, I believe someone, somewhere, has broken the SHA-0 hashing (just a rumour I heard.)  SHA-1, according to Wikipedia, has theoretical attacks.  SHA-2 and SHA-3 are, to my knowledge, not breakable with current technology.

HTH,

^_^

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LEGEND ,
Nov 22, 2016 Nov 22, 2016

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If the value has been ENCRYPTED and the key known, it can be decrypted.  Obviously.

If the value has been HASHED, then that's another tale.  Hashing is supposed to be irreversible.  However, I believe someone, somewhere, has broken the SHA-0 hashing (just a rumour I heard.)  SHA-1, according to Wikipedia, has theoretical attacks.  SHA-2 and SHA-3 are, to my knowledge, not breakable with current technology.

HTH,

^_^

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