Added SHA3 hash function (#189)

README.md

@@ -88,6 +88,7 @@ A curated list of cryptography resources and links.
 - [MD5](https://en.wikipedia.org/wiki/MD5) - Widely used hash function producing a 128-bit hash value. MD5 was initially designed to be used as a cryptographic hash function, but it has been found to suffer from extensive vulnerabilities. It can still be used as a checksum to verify data integrity, but only against unintentional corruption.
 - [SHA1](https://en.wikipedia.org/wiki/SHA-1) -  Cryptographic hash function designed by the NSA. SHA-1 produces a 160-bit hash value known as a message digest. SHA-1 is no longer considered secure against well-funded opponents.
 - [SHA2](https://en.wikipedia.org/wiki/SHA-2) - Set of hash functions designed by the NSA. SHA-256 and SHA-512 are novel hash functions computed with 32-bit and 64-bit words, respectively. They use different shift amounts and additive constants, but their structures are otherwise virtually identical, differing only in the number of rounds.
+- [SHA3](https://en.wikipedia.org/wiki/SHA-3) - Cryptographic hash function that produces a fixed-size output, typically 224, 256, 384, or 512 bits, from variable-size input data. It is part of the SHA-3 family of cryptographic algorithms designed to resist attacks from quantum computers and offers security properties such as pre-image resistance, second pre-image resistance, and collision resistance.
 
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