Sistem Pengamanan Data Teks Menggunakan Algoritma Message Digest-5

Abstract

Tthe security for data that be stored in computer at present has become an absolute condition. This is closely related to the importantance of the data to the appropriate people, whether it is authenticity or not. The data is out of use if it have been tapped by people who have no right to it. In cryptography there is a function that is suitable for security applications such as authentication and message integrity called Hash function, which is functioning as a recipient of an arbitrary length input string and converts it into a string which length remains the same output with the input string but much smaller. Cryptography MD-5 is one of the one-way hash function created by Ronald Riverst 1991. MD5 is an improvement from MD4 after MD4 successfully attacked by kriptanalis. This algorithm receives a message as input with an arbitrary sizes and produce a message digest of length 128 bits. In general the message digest creation steps are the addition of bits booster, increasing the length of the original message, initiate a buffer, processing the message in 512-bit block size.