MD5

MD5 (Message-Digest Algorithm 5) is a widely used, one-way cryptographic hash function that generates a 128-bit (32-character hexadecimal) digest from any input data.

MD5, designed by Ronald Rivest in 1991, is a hash algorithm that quickly processes an arbitrary-length message to produce a fixed, 128-bit hash value: the message digest. Historically, it served as a cryptographic function for digital signatures and password storage, and it remains common for non-cryptographic tasks like file integrity verification (checksums). However, MD5 is critically compromised: the IETF published RFC 6151 in 2011 to update its security considerations, formally acknowledging its severe collision vulnerabilities. Modern attacks can generate collisions in under a second, meaning two different inputs can produce the same 32-character output, rendering it unsuitable for security-sensitive applications.

https://datatracker.ietf.org/doc/html/rfc1321