Video Encryption Based on the Permutation of the (ℤ/pℤ) Fields

Advances in digital content transmission have increased in recent years. Issues of security and confidentiality of transmitted data have become an important concern in multimedia technology. In this paper, we propose an efficient algorithm to encrypt video sequences in real time without additional dedicated hardware. Our method is based on the principle of modified affine encryption to achieve transposition and to perform some manipulations such as puzzle to reduce the amount of bits to be processed on the image. Testing this approach provides a stronger security and a good encryption time on MPEG sequences.