WCSP2016 Color Image Encryption in YCbCr Space Xin Jin 1 , Sui Yin 1 - - PowerPoint PPT Presentation

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WCSP2016 Color Image Encryption in YCbCr Space Xin Jin 1 , Sui Yin 1 - - PowerPoint PPT Presentation

Jan 28, 2024 161 likes •460 views

WCSP2016 Color Image Encryption in YCbCr Space Xin Jin 1 , Sui Yin 1 , Xiaodong Li 1 , Geng Zhao 1 , Zhaohui Tian 2 , Nan Sun 1 , Shuyun Zhu 2 1 Beijing Electronic Science and Technology Institute GOCPCCC Key Laboratory of Information Security 2

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Color Image Encryption in YCbCr Space

WCSP2016

1Beijing Electronic Science and Technology Institute

GOCPCCC Key Laboratory of Information Security

2Xidian University

Corresponding authors: {jinxin,lxd}@besti.edu.cn

Beijing Electronic Science and Technology Institute

Xin Jin1, Sui Yin1, Xiaodong Li1, Geng Zhao1, Zhaohui Tian2, Nan Sun1, Shuyun Zhu2

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Outline

Motivation 1 Preliminaries 2 Color Image Encryption in YCbCr Space 3 Results and Security Analysis 4 Conclusion and Discussion 5

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Motivation

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R G B

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Motivation

Y Cb Cr

? ? ?

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Outline

Motivation 1 Preliminaries 2 Color Image Encryption in YCbCr Space 3 Results and Security Analysis 4 Conclusion and Discussion 5

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Preliminaries

RGB→YCbCrr 1D Logistic map 2D Arnold cat map 3D Lu map DNA Computing

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Preliminaries

RGB

YCbCr

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                                               B G R Cr Cb Y 071 . 368 . 439 . 439 . 291 . 148 . 098 . 504 . 257 . 128 128 16

                                              Cr Cb Y B G R 000 . 0017 . 2 164 . 1 813 . 392 . 164 . 1 596 . 1 000 . 164 . 1 128 128 16

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Preliminaries

1D Logistic map

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Preliminaries

2D Arnold cat map

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Preliminaries

3D Lu Map a = 36, b = 3, c = 20

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Preliminaries

DNA Encoding C 00011011

8 bit Pixel

G A T 00 11 01 10

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Preliminaries

DNA Computing + T A C G T A C G C G T A G C A T T A C G A T G C — T A C G T A C G C A T G G C A T T G C A A T G C X Complement(X) A T C G T A G C

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Outline

Motivation 1 Preliminaries 2 Color Image Encryption in YCbCr Space 3 Results and Security Analysis 4 Conclusion and Discussion 5

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Color Image Encryption in YCbCr

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Color Image Encryption in YCbCr

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The Y Channel

Y Confusion Result Diffusion Result

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Color Image Encryption in YCbCr

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The CbCr Channel

Cb Channel DNA Encoding Ab DNA Addition B Complement Bcomp DNA Decoding Cipher Image D 1D Logistic Map (X’,Y’) 1D Chaotic Map Z

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Outline

Motivation 1 Preliminaries 2 Color Image Encryption in YCbCr Space 3 Results and Security Analysis 4 Conclusion and Discussion 5

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The Encryption Results

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Key Space

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The precision of 64-bit double data is 10−15 The key space is about (1015)8 = 10120 ≈ 2399 The max key space of AES = (2256)

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Sensitivity of Secret Key

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dubao Cipher dubao Decrypted with wrong key

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The Histogram Analysis

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The Information Entropy

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YCbCr H(m) L*a*b* H(m) RGB H(m) Y 7.9996 L* 7.9961 R 7.9815 Cb 7.9998 a* 7.9952 G 7.9815 Cr 7.9997 b* 7.9815 B 7.9815

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The Correlation Analysis

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The Speed of the Encryption and Decryption

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128 256 384 512 640 1 2 3 4 5 6

image size time consumption(second) speed test

Encryption time in YCbCr Decryption time in YCbCr Encryption time in L*a*b* Decryption time in L*a*b* Encryption time in RGB Decryption time in RGB

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The Speed of the Encryption and Decryption

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128 256 384 512 640 0.05 0.1 0.15 0.2 0.25 0.3 0.35

image size time consumption(second) speed test

YCbCr2RGB time RGB2YCbCr time L*a*b*2RGB time RGB2L*a*b* time

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Outline

Motivation 1 Preliminaries 2 Color Image Encryption in YCbCr Space 3 Results and Security Analysis 4 Conclusion and Discussion 5

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Conclusion and Discussion

  • A color image encryption algorithm in YCbCr

space.

  • In future work, we will utilize the fast speed of the

YCbCr method and continue to improve the encryption algorithm to have a better and faster way.

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Thanks！

WCSP2016

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