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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) : Hashing Function, Modern Cryptography

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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:

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

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

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

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

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 or combined with salting the decryption will probably fail.

How to recognize SHA256 ciphertext?

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

The SHA256 algorithm is used by blockchain and validation of Bitcoin transactions, any reference is a clue.

Source code

dCode retains ownership of the online 'SHA-256' tool source code. Except explicit open source licence (indicated CC / Creative Commons / free), any algorithm, applet or snippet (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any function (convert, solve, decrypt / encrypt, decipher / cipher, decode / encode, translate) written in any informatic language (PHP, Java, C#, Python, Javascript, Matlab, etc.) no data, script or API access will be for free, same for SHA-256 download for offline use on PC, tablet, iPhone or Android !

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Thanks to your feedback and relevant comments, dCode has developped the best SHA-256 tool, so feel free to write! Thank you !


Source : https://www.dcode.fr/sha256-hash
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