What are the 4 functions in SHA-3 algorithm?

The SHA-3 family consists of six hash functions with digests (hash values) that are 128, 224, 256, 384 or 512 bits: SHA3-224, SHA3-256, SHA3-384, SHA3-512, SHAKE128, SHAKE256.

Why is SHA-3 not used?

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.

Is SHA-3 still secure?

SHA-3 is considered highly secure and is published as official recommended crypto standard in the United States. The hash function Keccak-256, which is used in the Ethereum blockchain, is a variant of SHA3-256 with some constants changed in the code.

How is SHA-3 different?

Difference between SHA256 and SHA3 The main difference of SHA256 and SHA3 are their internal algorithm design. SHA2 (and SHA1) are built using the Merkle–Damgård structure. SHA3 on the other hand is built using a Sponge function and belongs to the Keccak-family.

How does SHA-3 work?

SHA-3, developed by a renowned European cryptographic team, is based on the KECCAK cryptographic function. The KECCAK function consists of a structure that uses sponge construction,1 which represents a class of algorithms that take an input bit stream of any length to produce an output bit stream of any desired length.

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.

Why is SHA-3 secure?

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.

What are the advantages of SHA-3?

Is SHA-3 a cipher?

SHA-3 (Secure Hash Algorithm 3) is the latest member of the Secure Hash Algorithm family of standards, released by NIST on August 5, 2015. Although part of the same series of standards, SHA-3 is internally different from the MD5-like structure of SHA-1 and SHA-2….SHA-3.

General
Structure	sponge construction