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SHA-256

Tool to decrypt/encrypt SHA-256. The SHA-256 hash is the US federal standard that matches an hexadecimal 64-character fingerprint to an original binary data.

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SHA-256 -

Tag(s) : Modern Cryptography, Informatics

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SHA-256

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SHA-256 Decoder



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See also: Hash FunctionSHA-1MD5

SHA256 Encoder





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Tool to decrypt/encrypt SHA-256. The SHA-256 hash is the US federal standard that matches an hexadecimal 64-character fingerprint to an original binary data.

Answers to Questions

How to encrypt a character string using SHA256?

SHA256 encryption computes a 256-bit or 32-byte digital fingerprint, whose hexadecimal writing consists of 64 characters. The algorithm uses non-linear functions such as:

$$ \operatorname{Ch}(E,F,G) = (E \and F) \oplus (\neg E \and G) $$

$$ \operatorname{Ma}(A,B,C) = (A \and B) \oplus (A \and C) \oplus (B \and C) $$

$$ \Sigma_0(A) = (A\!\ggg\!2) \oplus (A\!\ggg\!13) \oplus (A\!\ggg\!22) $$

$$ \Sigma_1(E) = (E\!\ggg\!6) \oplus (E\!\ggg\!11) \oplus (E\!\ggg\!25) $$

and also 64 constants: 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2

Example: dCode has for hash 254cd63ece8595b5c503783d596803f1552e0733d02fe4080b217eadb17711dd

SHA-256 encryption is a hash, which means that it is one-way and can not be decrypted.

How to decrypt SHA256 cipher?

Since SHA256 is a hash based on non-linear functions, there is no decryption method.

dCode uses word databases whose hash has already been calculated (several million potential passwords) and checks if the hash is known. If it is not known the decryption will fail.

How to recognize SHA256 ciphertext?

The hash is composed of 64 hexadecimal characters 0123456789abcdef (ie 256 bits)

Source code

dCode retains ownership of the source code of the script SHA-256 online. Except explicit open source licence (indicated Creative Commons / free), any algorithm, applet, snippet, software (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any function (convert, solve, decrypt, encrypt, decipher, cipher, decode, code, translate) written in any informatic langauge (PHP, Java, C#, Python, Javascript, Matlab, etc.) which dCode owns rights will not be released for free. To download the online SHA-256 script for offline use on PC, iPhone or Android, ask for price quote on contact page !

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