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An Analysis of a Chaos-based Fast Image Encryption Algorithm

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dc.contributor.advisor Dailey, Matthew N.
dc.contributor.author Rahmawati, Weny Mistarika
dc.contributor.other Dung, Phan Minh
dc.contributor.other Namprempre, Chanathip
dc.date.accessioned 2015-05-13T14:21:35Z
dc.date.available 2015-05-13T14:21:35Z
dc.date.issued 2014-12
dc.identifier.other AIT Thesis no.CS-14-03
dc.identifier.uri http://www.cs.ait.ac.th/xmlui/handle/123456789/779
dc.description 37 p. en_US
dc.description.abstract Rapid development of computer networks has caused increasing data transfer via the Inter- net. Images, as one type of data, are of much concern because of the necessity to transfer large amount of image data. In some cases, image transmission is needed to be secure. This is causes many researchers concern to encrypt image. Image permutation and image diffu- sion are some of the primitive for encrypting an image. Permutations goal is to make the location of image values cramble, whereas diffusion goal is to change the value of the im- age pixel. Permutation and diffusion are two different processes. Many researchers want to use both permutation and diffusion in encryption scheme. A research proposes an algorithm chaos-based and combines permutation and diffusion to encrypt image in one time pass. Chaos based isused because it produces pseudo random numbers that are very sensitive to some parameters. With this idea, the encryption and decryption claimed as a fast encryption scheme. As an encryption algorithm, these curity notion is also need to be concerned. The chaos based fast image encryption is a deterministic encryption which has proven to be insecure under security notion of probabilistic encryption scheme. Even with security notion for determin- istic algorithm, the research is fragile to chosen plain text attack under padding assumption. The research does not mention how to do padding so if we assume that the padding is using zero padding it will be insecure. This study analyzes the performance of the chaos based fast image encryption algorithm by implementing the algorithm, finding that its running time is not faster than a standard en- cryption algorithm, Advanced Encryption Standard (AES) in CBC mode. I also analyze the security of the algorithm under well known security notions for probabilistic and determin- istic encryption schemes and find the method in secure under both notions. Image encryption researches are advised to report notion result in comparison with standard algorithms and to become familiar with the basics of crypt analysis before proposing scheme. en_US
dc.description.sponsorship Directorate General of Higher Education (DIKTI), Ministry of Education and Culture, Indonesia - AIT fellowship en_US
dc.title An Analysis of a Chaos-based Fast Image Encryption Algorithm en_US
dc.type Thesis en_US

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