Slice-level selective encryption for protecting video data

Abstract

Abstract²SECMPEG selectively encrypts data to protect MPEG video streams. However, this scheme is inefficient because it encrypts the whole I-frames whose size is relatively larger than B/P-frames. In this paper, we propose a more efficient selective encryption approach which exploits the error propagation property in MPEG2 standard. Our experimental results show that the proposed approach can reduce the execution time of SECMPEG by a factor of 32 without degradation of the security.

Fast Video Encryption Using the H.264 Error Propagation Property for Smart Mobile Devices

“…In an I-frame, intra-coding is permitted and all previously decoded reference pictures will not be used in the further decoding process. Many video compression methods have used lossy techniques to remove spatial and temporal redundancy [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ], and typically consist of the intra- and inter-mode. In these modes, a current macroblock refers to the previous macroblock and pixels.…”

“…In addition, to measure the security level, the visual security has been represented as PSNR or MSE in some researches for selective encryptions [ 28 , 29 , 30 , 31 , 32 ]. Also, the execution time or encrypted data size can be measured to verify the improvement of speed for selective encryptions.…”

“…Therefore, the confusion degree ( i.e. , CD ) can be defined as the difference between the cipher text and the plaintext in a cryptographic system [ 29 ]. In fact, the visual security has been represented as PSNR or MSE in some researches for selective encryption.…”

“…In fact, the visual security has been represented as PSNR or MSE in some researches for selective encryption. However, we quantitatively represent the visual security as confusion degree ( CD ), which is similar to [ 28 , 29 , 30 , 31 , 32 ]. In this paper, the structural similarity ( i.e.…”

“…In transmitting video data over Video Sensor Networks (VSNs), the video data can be sent to and from portable devices such as smartphones [ 1 , 2 , 3 , 4 , 5 ]. Frequently, multimedia data delivery raises issues around content ownership and privacy; therefore, protecting content is important in multimedia applications [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ]. Since the size of multimedia data is large, efficient encryption methods for protecting content, while also satisfying real-time requirements, are necessary [ 3 , 4 , 5 ].…”