PEMANFAATAN MODIFIED AUTHENTICATED KEY AGREEMENT PROTOCOL WITH TIME STAMP PADA APLIKASI SECURE INSTANT MESSAGING

Abstract

Instant messaging (IM) a service that is used as a communication medium has several
advantages since we can communicate in real-time, fast, and with very low cost. These
advantages led to the growing number of IM users of the service both from business,
military, and government. However, since security aspects were not a design priority
the emergence of threats such as eavesdropping and replay attacks also increased in
recent years. Therefore,additional security measures are required to prevent the threat.
Secure Instant Messaging (SIM) is a software that implements the technique IM
encryption, key agreement and authentication with the aim of preventing eavesdropping
and replay attacks. SIM the encryption of the message before it is transmitted over
communication channels. Based on the results of testing, the process of authentication,
encryption and decryption do not degrade performance significantly based on time and
memory used. Key agreement requires an average time of 25-32 seconds. This causes
considerable delay occurred in the SIM application. On memory testing, key agreement
requires a 56% memory.