Construct DNA Symmetric Encryption Based On Fragment Assembly

Xiaofei Sun


DNA cryptography is a new born information security field and has been the international frontier of cryptography emerged with the constantly invasion of traditional cryptography and improvement of research on DNA computing and bio-technology. Based on the problem of fragment stitching, this work was made for introducing the background of DNA cryptography, and briefly describing the features of DNA molecular, key biotechnologies and related software. Then we study the difficult biological problem which is the key and basic part in designing of DNA encryption. We put forward own difficult problem which is to assembly when overlaps are destroyed and prove its difficulty with examples. After analysis of encoding of DNA and mechanism of symmetric encryption, we design a symmetric system using the technology of DNA digital coding and DNA fragment assembly. And the security analysis proves that the scheme has high confidential strength.


DNA cryptography; Difficult biological problems; DNA fragment assembly; Symmetric encryption

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