Introduction - If you have any usage issues, please Google them yourself
The full name of MD5 is Message-digest Algorithm 5 (Information- Summary of algorithm), to ensure consistent messaging integrity. In the early 90s by the MIT Laboratory for Computer Science and RSA Data Security Inc, the Ronald L. Rivest developed by the MD2, MD3 and MD4 evolved. Its role is to enable large-capacity information signed with a digital signature private key before the software was "compressed" into a confidential format (is an arbitrary length string of bytes must transform into a big long integer).