A novel video encryption algorithm-based on speaker voice as the public key

Advances in the digital content transmission have been extremely increased in the past few years. In addition, the security and privacy issues of the transmitted data have increasingly an important concern in multimedia technology. In this paper, we propose applicable and secure video encryption algorithm. This makes secure video encryption feasible for realtime application. The proposed algorithm concentrates in general on the symmetric key cryptographic technique. Characteristically, the multimedia technology which has been usually used by public users is resulting in a key exchange problem and normally a trusted intermediate authority takes this responsibility. In this paper, we have proposed a novel video encryption algorithm based on the speaker voice to generate a public key which eliminates the need for a trusted third party for key exchange. The generated public key from the speaker´s voice is used to encrypt of the transferred digital multimedia over the open communication channel (i.e. Internet). The experimental results showed that the proposed algorithm is very secure and has on average only 5.4 ms of encryption time per frame, which is significantly smaller compared to the state of the art secure video encryption algorithms.