The needs of information currently encourage the growth of information security methods. Art encryption and security is the cryptographic message is growing very fast right now. The use of digital computers currently encouraging the growth of modern cryptographic algorithms that operate in bit mode. Modern cryptographic algorithms are divided into key and public key symmetry. Symmetry key algorithm was divided into stream ciphers and block ciphers. All of these types of algorithms used in various fields of application. Blowfish is a block cipher algorithm that is very broad and many use today. The second algorithm developed by Bruce Scheneier. Twofish Widespread use of these algorithms due to the strong against attacks. The study of Blowfish algorithms performed because a close relationship between the algorithm. The study and implementation is done by looking at the algorithm from different sides. Side which will be discussed in this study is the explanation of the algorithm, security testing algorithms, and implementation of algorithm
