Software cryptography is a great utility for many applications. If properly implemented, it provides a good level of security. However, some applications may require a greater level of secrecy and privacy, in such cases hardware cryptography would be more adequate. This paper illustrates the integration of hardware cryptosystem and instant messaging desktop application. Today, people use online chat platforms for sharing their private and business information. Such information can be attacked by hackers. The present instant messenger systems lack authenticity, confidentiality and integrity, and such disadvantages can be collaboratively eliminated through this proposed idea. Results will be tested to check whether the proposed model is resistant to adversarial attacks and also by considering cryptographic test like Hamming distance and NIST SP800-22.