Implementation of speech encryption and decryption using advanced encryption standard

With the rapid increase in computing and communication devices the need for security services has become crucial in information transfer. Protecting the digital information against security attacks is extremely important. Encipherment is the security mechanism that provides authenticity and confidentiality. In this paper a highly secured design for offline speech communication is presented. The proposed design uses Advanced Encryption Standard, a sophisticated cryptographic algorithm, which ensures that the transmitted data is protected from unauthorized disclosure. This design is implemented on Field Programmable Gate Array for real time application of offline speech encryption and decryption.