Adopsi Generator Kunci Euler Number dan Pembangkit Kunci Blum Blum Shub untuk Meningkatkan Confidentiality Level pada Extended Vigenere

Abstract

The Vigenere algorithm is an encryption model that is still being developed in the field of information security today. One aspect that is considered important in the field of information security is confidentiality. The problem of achieving high message or information thresholds is very important in the field of information security. Extended Vigenere is known as an evolution of Vigenere that implements more character sets. One of Vigenere's development algorithms is to modify the key generator used. This experiment aims to test the effect of information confidentiality on the use of the Blum Blum Shub (BBS) key generator and the Euler number applied to Extended Vigenere. The BBS key generation method and Euler number are used sequentially. As a sample, short astronomical observation conversations sent via telegram with a file size of 1 KB were used. Experiments were carried out using different key lengths, namely 32-bit keys and 64-bit keys. As a measurement metric, the entropy calculation of the Extended Vigenere output is used. The results obtained are a significant increase in information confidentiality with an entropy achievement value of more than 79% of the optimum entropy