SHA4

SHA4 refers to a hypothetical family of cryptographic hash functions. The term is a continuation of the Secure Hash Algorithm (SHA) series developed by the National Security Agency (NSA). SHA itself began with SHA-0, followed by SHA-1, and then the SHA-2 family, which includes SHA-224, SHA-256, SHA-384, SHA-512, SHA-512/224, and SHA-512/256. The naming convention suggests that SHA4 would be the next evolutionary step in this line of algorithms.

As of current knowledge, there is no officially released or standardized cryptographic hash function designated as SHA4. The development and standardization of cryptographic algorithms are typically managed by organizations like the National Institute of Standards and Technology (NIST) in the United States, often through public competitions and rigorous review processes. While research into new cryptographic primitives and hash functions is ongoing, a specific SHA4 has not emerged from these processes.

The SHA-2 family is widely used and considered secure for most applications. However, cryptographers continuously explore advancements to address potential future threats, such as those posed by quantum computing, or to improve efficiency and security properties. Any future iterations, whether branded as SHA4 or by a different name, would undergo extensive scrutiny before widespread adoption. The research and development landscape for cryptographic algorithms is dynamic, and the possibility of future SHA generations remains a topic of academic and practical interest.