Introduction to MD5

MD5, short for Message-Digest Algorithm, is a widely used cryptographic hash function that generates a 128-bit (16 bytes) hash value. This hash value is used to ensure the integrity and consistency of information during transmission. MD5 is primarily employed for data integrity verification, digital signatures, and secure access authentication.

Introduction to SHA1

SHA (Secure Hash Algorithm) is a family of cryptographic hash functions, with SHA1 being one of them. It is a security hash algorithm certified by FIPS. The algorithm calculates a fixed-length string (also known as a message digest) corresponding to a digital message.

Introduction to HMAC MD5

HMAC, an abbreviation for Hash-based Message Authentication Code, is a key-related hash operation message authentication code method proposed by H. Krawczyk, M. Bellare, and R. Canetti in 1996. It involves using a hash function and a key for message authentication.

HMAC MD5 employs the MD5 algorithm for hashing, and in comparison to the MD5 algorithm, it includes an additional key (also known as an authentication code), providing an extra layer of security.