A Technical Approach to the Transparent Encryption of MPEG-2 Video

Lecture Notes in Computer Science

2006

Abstract. Many application scenarios do not demand confidential encryption of visual data, but on the contrary require that certain image information is public (transparent encryption). One scenario is e.g., Pay-TV, where a low quality version should become public to attract possible customers. Transparent encryption can be implemented most efficiently in case of scalable bitstreams by encrypting enhancement layer data and baseline JPEG is therefore not well suited for designing such encryption schemes in an efficient manner. This paper investigates how transparent encryption can be realized through selective encryption of the progressive JPEG modes. The traditional approach which encrypts enhancement layers starting at the end of the bitstream suffers from high computational load. Encryption schemes with significantly reduced encryption effort are shown to deliver equivalent image quality and security.

Section: Introductionmentioning

confidence: 99%

Transparent Image Encryption Using Progressive JPEG

Stütz

Lecture Notes in Computer Science

2006

“…In the context of scalable or embedded bitstreams transparent encryption is achieved by simply encrypting the enhancement layer(s). This has been proposed by Kunkelmann and Horn using a scalable video codec based on a spatial resolution pyramid [11,12] and by Dittmann and Steinmetz [4] using a SNR scalable MPEG-2 encoder/decoder. Yuan et al [28] propose to use MPEG-4 FGS for transparent encryption in the same manner.…”

Section: Previous Workmentioning

confidence: 99%

Parameterized biorthogonal wavelet lifting for lightweight JPEG 2000 transparent encryption

Engel

Proceedings of the 7th Workshop on Multimedia and Security

2005

Lightweight encryption offers a cogent alternative to full encryption of visual content in application settings with clients of low processing power, e.g. mobile applications, as it counterbalances security demands and computational demands. We present a lightweight transparent encryption scheme for JPEG 2000 that is based on and integrated into the wavelet lifting scheme. Keys are constructed from parameterized biorthogonal filters. The proposed method comes at extremely low computational cost and provides natural support for transparent encryption. We discuss the advantages and disadvantages of this encryption scheme with respect to keyspace, computational demands, compression performance, and security.

“…Commonly, transparent encryption is achieved in this environment by simply encrypting the enhancement layer(s). This has been proposed by [13,12] using a scalable video codec based on a spatial resolution pyramid, by [3,4] using an SNR scalable MPEG-2 encoder/decoder, and by [19] for the progressive JPEG variants [7]. Yuan et al [26] propose to use MPEG-4 FGS for transparent encryption.…”

Section: Introductionmentioning

confidence: 99%

On efficient transparent jpeg2000 encryption

Stütz

Proceedings of the 9th Workshop on Multimedia &Amp; Security - MM&Sec '07

2007

Efficient (in the sense of computationally efficient as well as efficient from a distribution technology perspective) formatcompliant transparent encryption schemes for JPEG2000 are investigated. While the traditional approach of encrypting enhancement layers suffers from high computational encryption demand and drawbacks in distribution, the proposed window encryption approach can reduce computational cost and allows a controlled adaptation of the required security for many application scenarios.