Rate-Distortion-Authentication Optimized Streaming of Authenticated Video

Abstract

Abstract-We define authenticated video as decoded video that results from those received packets whose authenticities have been verified. Generic data stream authentication methods usually impose overhead and dependency among packets for verification. Therefore, the conventional rate-distortion (R-D) optimized video streaming techniques produce highly sub-optimal R-D performance for authenticated video, since they do not account for the overhead and additional dependencies for authentication. In this paper, we study this practical problem and propose an Rate-Distortion-Authentication (R-D-A) optimized streaming technique for authenticated video. Based on packets' importance in terms of both video quality and authentication dependencies, the proposed technique computes a packet transmission schedule that minimizes the expected end-to-end distortion of the authenticated video at the receiver subject to a constraint on the average transmission rate. Simulation results based on H.264 JM 10.2 and NS-2 demonstrate that our proposed R-D-A optimized streaming technique substantially outperforms both prior (authentication-unaware) R-D optimized streaming techniques and data stream authentication techniques. In particular, when the channel capacity is below the source rate, the PSNR of authenticated video quickly drops to unacceptable levels using conventional R-D optimized streaming techniques, while the proposed R-D-A Optimization technique still maintains optimized video quality. Furthermore, we examine a low-complexity version of the proposed algorithm, and also an enhanced version which accounts for the multiple deadlines associated with each packet, which is introduced by stream authentication.

A Scalable Information Security Technique: Joint Authentication-Coding Mechanism for Multimedia over Heterogeneous Wireless Networks

“…A three-level wavelet decomposition is applied to a group of 16 frames and the 3-D wavelet coefficients are divided into two groups using the method proposed in [13]. We use RS (15,9) as the channel coding in the following simulations.…”

“…Hence, packet P i can be authenticated if and only if Fig. 1 Architecture of the joint authentication and coding scheme there is a path from P i to the signature packet that only includes nodes corresponding to the received packets [9]. We denote the probability that P i is linked to P sig via such a path by Pr[P i → P sig ].…”

Scheduling security-critical multimedia applications in heterogeneous networks

“…In practice, we can use standard cryptographic hash functions such as SHA1 [13] and MD5 [14]. To authenticate the packet P j , the receiver simply computes the hash of P j and checks whether it equals the corresponding hash value carried in the packet P i [18]. Since the cryptographic hash function is collision resistant, it is computationally infeasible to find a different packet P 0 that hashes to the same authenticated value.…”

Perceptual Hashing-Based Robust Image Authentication Scheme for Wireless Multimedia Sensor Networks

“…The scheme significantly improved the authenticated image quality even under strict communication energy consumption constraints in WMSN. In [12], a rate-distortion optimization authentication scheme for H.264 video transmissions was proposed. A video packet transmission scheduler was designed to minimize the visual distortion under the limitation of total bit budget and authentication dependency.…”