How to Decrypt a Sha-256 Encrypted String

How to decrypt a SHA-256 encrypted string?

SHA-256 is a cryptographic (one-way) hash function, so there is no direct way to decode it. The entire purpose of a cryptographic hash function is that you can't undo it.

One thing you can do is a brute-force strategy, where you guess what was hashed, then hash it with the same function and see if it matches. Unless the hashed data is very easy to guess, it could take a long time though.

You may find the question "Difference between hashing a password and encrypting it" interesting.

Can SHA-256 Be Decrypted?

SHA-256 is not encryption, it's hashing.

You can't decrypt it, that's the whole point with it. You use it by hashing other data and comparing the hash codes to determine if the data is identical to the original.

Hashing is used for passwords. By storing the hash of a password it can't be used to find out the password, but it can be used to determine if an entered password is correct.

Hashing is also used to determine the integrity of data files. When data is transfered there might be accidental changes, by comparing a hash of the original data with the hash of the transfered data you can determine if the data is intact.

How to decrypt SHA-256 encrypted String with Secret key String?

This is my java code that encrypt the String values using the secret key

No it isn't. This is your Java code that creates a message authentication code using a secure hash of the string value, using the SHA-256 secure hash algorithm.

and its properly work but i don't know how to decrypt that ecrypted values into My original values..?

There are no encrypted values here.

How to decrypt the Encrypted String....?

There is no encrypted String here. There is a secure hash of a String, and the major property of secure hashing is that it is not reversible.

Your question doesn't make sense.

Possibly what you are looking for is a way to check the HMAC? In which case you need to recreate the HMAC from the same message with the same key, and compare.



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