Open Access

A DSP Based POD Implementation for High Speed Multimedia Communications

  • Chang Nian Zhang1,
  • Hua Li2,
  • Nuannuan Zhang1 and
  • Jiesheng Xie3
EURASIP Journal on Advances in Signal Processing20022002:423858

DOI: 10.1155/S1110865702204138

Received: 20 August 2001

Published: 1 September 2002


In the cable network services, the audio/video entertainment contents should be protected from unauthorized copying, intercepting, and tampering. Point-of-deployment (POD) security module, proposed by , allows viewers to receive secure cable services such as premium subscription channels, impulse pay-per-view, video-on-demand as well as other interactive services. In this paper, we present a digital signal processor (DSP) (TMS320C6211) based POD implementation for the real-time applications which include elliptic curve digital signature algorithm (ECDSA), elliptic curve Diffie Hellman (ECDH) key exchange, elliptic curve key derivation function (ECKDF), cellular automata (CA) cryptography, communication processes between POD and Host, and Host authentication. In order to get different security levels and different rates of encryption/decryption, a CA based symmetric key cryptography algorithm is used whose encryption/decryption rate can be up to . The experiment results indicate that the DSP based POD implementation provides high speed and flexibility, and satisfies the requirements of real-time video data transmission.


point-of-deployment DSP cellular automata copy protection ECDSA DH key exchange