Encryption of URL Address (Uniform Resource Locator) on PHP Web Base with MD5 Algorithm

Abstract

The problem of an information (web base) is the security of the database displayed by the website manager. A common problem that is often encountered in information systems is how to make data displayed publicly have secure access without having to destroy the data in the web base system itself. A cryptographic system or often called a cipher is a system or collection of rules used to perform encryption and decryption. There are two kinds of cryptographic systems, namely secret key cryptographic systems or often referred to as symmetric cryptographic systems and public key cryptographic systems or often referred to as asymmetric cryptographic systems. MD5 is a one-way hash function created by Ron Rivest. MD5 is an improvement over MD4 after MD4 was successfully attacked by cryptanalysts. The MD5 algorithm takes as input a message of arbitrary size and produces a message digest that is 128 bits long.