Are parameterised biorthogonal wavelet filters suited (better) for selective encryption?

Kutil

Proceedings of the 8th Workshop on Multimedia and Security

2006

Self Cite

We present a family of attacks on lightweight encryption schemes for visual data that rely on wavelet filter parameterizations to provide security. All of the attacks construct a symbolic representation of the inverse wavelet transform. We show that this representation can be used in ciphertext-only attacks, known-plaintext attacks and in attacks in which some information on the plaintext is available. We investigate the success and feasibility of each of these attacks, and conclude that the presented type of attacks poses a principal problem for lightweight encryption schemes that rely on the parameterization of a (linear) transform.

Section: Lightweight Encryption With Parameterized Waveletsmentioning

confidence: 99%

A symbolic transform attack on lightweight encryption based on wavelet filter parameterization

Kutil

Proceedings of the 8th Workshop on Multimedia and Security

2006

Self Cite

“…To overcome the latter deficiency, a heuristic is proposed to avoid filters with low compression performance. Uhl and Pommer [25] use a parameterization of biorthogonal filters (as proposed by Hartenstein [8]) which yields some filters that can compete with the established filters. Still the parameterization is ill-suited for the aforementioned purpose as the variation of the obtained filters with regard to their compression performance is even worse than in the orthogonal case, with the worst filters going down below 5dB in a PSNR comparison.…”

Section: Previous Workmentioning

confidence: 99%

Parameterized biorthogonal wavelet lifting for lightweight JPEG 2000 transparent encryption

Proceedings of the 7th Workshop on Multimedia and Security

2005

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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.

“…However, this suggestion remains vague and is not supported by any experiments, while [19,20] propose encrypting the orthogonal filterbanks used for an nonstationary multi-resolution analysis (NSMRA) decomposition. The use of concealed biorthogonal parametrized wavelet filters for lightweight encryption is proposed by [21]. The use of key-dependent wavelet packet decompositions is proposed first by [22,23].…”

Section: Introductionmentioning

confidence: 99%

Assessing JPEG2000 encryption with key-dependent wavelet packets

Stütz

EURASIP J. on Info. Security

2012

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We analyze and discuss encryption schemes for JPEG2000 based on the wavelet packet transform with a keydependent subband structure. These schemes have been assumed to reduce the runtime complexity of encryption and compression. In addition to this "lightweight" nature, other advantages like encrypted domain signal processing have been reported. We systematically analyze encryption approaches based on key-dependent subband structures in terms of their impact on compression performance, their computational complexity and the level of security they provide as compared to more classical techniques. Furthermore, we analyze the prerequisites and settings in which the previously reported advantages actually hold and in which settings no advantages can be observed. As a final outcome it has to be stated that the compression integrated encryption approach based on the idea of secret wavelet packets can not be recommended.