Abstract:
Current technological developments enable people to communicate and
can exchange information remotely. Along with that will the confidentiality of
interchangeable information that is increasing. Therefore, developed a branch of
science that learn about the ways of securing data or better known as
cryptography. The vigenere cipher algorithm belongs to classical cryptography
that has a symmetric key (there is only one key) that is used to encrypt or. This
application is done cryptography on the text of the capital letters, the results of
this study is an android-based applications that can send a message that has been
encrypted using vigenere cipher algorithm, so the confidentiality of this message
can be gated.
