By : I Wayan Indra Adhi Suputra

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Faculties : Fakultas Matematika dan Ilmu Pengetahuan Alam

Department : S1 Ilmu Komputer

The importance of phone conversations’ recordings cause a degree of security and confidentiality of the private recordings must be increased to prevent data leakage to other parties that may be manipulated and can harm the original owner of the recording of conversation. Therefore, a security system is needed to safeguard the results of the telephone conversation that can only be accessed by the original owners. Security of telephone conversation data recording can be made by encoding the data in the original recording of the conversation that the other party cannot know the content and purpose of the recording. The method that can be used is cryptography. The process used in securing information in cryptography is encryption and description. Recordings are made when a telephone conversation is in progress that the encryption process will immediately be done so that the encryption method used is a stream cipher method. Stream cipher method is used because it is suitable for encrypting data in real time. he system created successfully secured the file of telephone conversations’ recordings on Android mobile phones, so that the recorded file to be safe and can not be opened or listened after the encryption process. RC4 algorithm is able to secure the recording file but the different file levels of encryption with decryption was not very well seen from the test results

Keyword : security, conversation, cryptography, stream cipher , RC4

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