Algorithm Description
The MD5 message digest algorithm (English: MD5 Message-Digest Algorithm), a cryptographic hash function is a widely used, can produce a 128-bit (16 byte) hash value (hash value), for ensuring the transmission of information complete and consistent. MD5, disclosed in 1992 by the American cryptographer Ronald Rivest (Ronald Linn Rivest) designed to replace the MD4 algorithm. This algorithm is a program to regulate the RFC 1321 standard. The algorithm was confirmed in 1996 after weaknesses, can be be cracked, the need for a high degree of data security, experts generally recommend using other algorithms, such as SHA-2. 2004 years, proved unable to prevent the MD5 algorithm collision (collision), and therefore does not apply to security authentication, such as SSL public-key authentication or digital signature purposes.
From: Baidu Encyclopedia
feature:
After md5 encryption is 16-bit or 32-bit characters, letters and numbers, capitalization unity;
in theory can not be decrypted unless brute force
