Does SHA-3 have collisions?

In brief, we obtain actual collisions on three 5-round instances of SHA-3, i.e., SHAKE128, and SHA3-224, SHA3-256, and three instances of Keccak contest. The number of practically attacked rounds of Keccak instances now is increased to 6.

What is the main reason that NIST called for SHA-3 competition?

NIST opened a public competition on November 2, 2007, to develop a new cryptographic hash algorithm (referred to as SHA-3) to augment the hash algorithms specified in Federal Information Processing Standard (FIPS) 180-2, Secure Hash Standard1 [1].

How secure is SHA-3?

SHA-3 provides a secure one-way function. This means you can’t reconstruct input data from the hash output, nor can you change input data without changing the hash. You also won’t find any other data with the same hash or any two sets of data with the same hash.

Who was the winner of the NIST Sha 3 competition?

On October 2, 2012, Keccak was selected as the winner of the competition. In 2014, the NIST published a draft FIPS 202 “SHA-3 Standard: Permutation-Based Hash and Extendable-Output Functions”. FIPS 202 was approved on August 5, 2015.

Why is Sha 3 not in wider use?

Performance is not a reason for most applications. Indeed, performance is a reason not to switch. SHA3 is slower than SHA-2 on a general-purpose processor. It was one of the slowest finalists of the SHA3 competition across various processors.

What’s the purpose of the SHA-3 hash algorithm?

The purpose of SHA-3 is that it can be directly substituted for SHA-2 in current applications if necessary, and to significantly improve the robustness of NIST’s overall hash algorithm toolkit.

Is the source code for SHA-3 in public domain?

The reference implementation source code was dedicated to public domain via CC0 waiver. In 2006 NIST started to organize the NIST hash function competition to create a new hash standard, SHA-3. SHA-3 is not meant to replace SHA-2, as no significant attack on SHA-2 has been demonstrated.