Design and efficient implementation of a chaos-based stream cipher

Taha, Mohammed A.; Assad, Safwan El; Queudet, Audrey; Déforges, Olivier

doi:10.1504/ijitst.2017.087131

Cited by 18 publications

(20 citation statements)

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“…In HEVC, an adaptive scanning method of TCs is utilized for the block of sizes of 4 × 4 and 8 × 8 to gain from the statistical distribution of the active coefficients in 2-D transform blocks. For modes (6)(7)(8)(9)(10)(11)(12)(13)(14), vertical scan is used, horizontal scan for modes (22)(23)(24)(25)(26)(27)(28)(29)(30), and diagonal scan for the rest of the modes. The chroma IPMs are derived from the luma IPMs if the Derived flag is set to 1.…”

Section: Intra Prediction Modesmentioning

confidence: 99%

“…For a particular syntax element, the key-stream generator will generate the required key streams needed to get the ciphering data. The key stream generator is fostered from our previous work [10,11]. The internal state, which involves the main cryptographic complexity of the system, is consists by two third-order recursive filters.…”

Section: Encryption System Based On Chaosmentioning

confidence: 99%

“…This value allows to produce a different key stream sequence on each generator call. The detailed structure and the cryptographic security analysis of the key stream generator is elaborated in Reference [10]. The scheme of our key stream generator based on a chaotic map is depicted in Figure 2.…”

Section: Encryption System Based On Chaosmentioning

confidence: 99%

“…Moreover, we propose a format-compliant encryption algorithm of the luma and chroma Intra Prediction Modes (IPM). The proposed SE solution relies on the chaos-based stream cipher which based on a chaotic keystream generator published in References [10,11]. It includes a set of HEVC coding restrictions to deny the encryption propagation out of the ROI under an Inter coding configuration.…”

Section: Introductionmentioning

confidence: 99%

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Privacy Protection in Real Time HEVC Standard Using Chaotic System

et al. 2020

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Video protection and access control have gathered steam over recent years. However, the most common methods encrypt the whole video bit stream as unique data without taking into account the structure of the compressed video. These full encryption solutions are time and power consuming and, thus, are not aligned with the real-time applications. In this paper, we propose a Selective Encryption (SE) solution for Region of Interest (ROI) security based on the tile concept in High Efficiency Video Coding (HEVC) standards and selective encryption of all sensitive parts in videos. The SE solution depends on a chaos-based stream cipher that encrypts a set of HEVC syntax elements normatively, that is, the bit stream can be decoded with a standard HEVC decoder, and a secret key is only required for ROI decryption. The proposed ROI encryption solution relies on the independent tile concept in HEVC that splits the video frame into independent rectangular areas. Tiles are used to pull out the ROI from the background and only the tiles figuring the ROI are encrypted. In inter coding, the independence of tiles is guaranteed by limiting the motion vectors of non-ROI to use only the unencrypted tiles in the reference frames. Experimental results have shown that the encryption solution performs secure video encryption in a real time context, with a diminutive bit rate and complexity overheads.

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Section: Intra Prediction Modesmentioning

confidence: 99%

Section: Encryption System Based On Chaosmentioning

confidence: 99%

Section: Encryption System Based On Chaosmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Privacy Protection in Real Time HEVC Standard Using Chaotic System

et al. 2020

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“…We use an enhanced version (fast and secure) of our chaotic generator (without delays) published in El Assad and Noura patent [15]. It should be noted that the proposed joint selective encryption can be used with any secure and fast classical or chaosbased generator to obtain similar results [16,17]. Indeed, to the best of our knowledge, practically, most chaotic generators of the literature, in which they combine two chaotic maps are robust against statistical and known attacks.…”

Section: Robust and Fast Chaotic Generatormentioning

confidence: 99%

Real-time selective video encryption based on the chaos system in scalable HEVC extension

Hamidouche

Farajallah

Sidaty

et al. 2017

Signal Processing: Image Communication

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In this paper we propose a real-time selective video encryption solution in the scalable extension of High Efficiency Video Coding (HEVC) standard, referred to as SHVC. The proposed scheme encrypts a set of sensitive SHVC parameters with a minimum delay and complexity overheads. The encryption process is performed at the CABAC binstring level and fulfils both constant bitrate and format compliant video encryption requirements. In addition, it preserves all SHVC functionalities, including bitstream extraction for mid-network adaptation and error resilience. We compare the performance of three selective SHVC encryption schemes: the first scheme encrypts only the lowest SHVC layer, the second encrypts all layers and the last scheme encrypts only the highest layer. The performance of the proposed schemes is assessed over different video encryption criteria, at different scalability configurations and various High Definition (HD) video sequences. Experimental results showed that encrypt only the lowest layer or all layers enables a high security level, while encrypting only the highest layer leads to a perceptual encryption solution, by slightly decreasing the highest layer quality. Moreover, the processing complexity of the proposed solution is assessed in the context of a real-time SHVC decoder. The complexity overhead remains low and does not exceed 6% of the real-time decoding of SHVC video sequences.

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