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Timed Release Program Obfuscation
CHENG Rong 1,ZHANG Fangguo 2
1. School of Information Science and Technology, Sun Yat-sen University, Guangzhou 510006
2. School of Information Science and Technology, Sun Yat-sen University, Guangzhou 510006
*Correspondence author
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Funding: none
Opened online:13 December 2013
Accepted by: none
Citation: CHENG Rong ,ZHANG Fangguo.Timed Release Program Obfuscation[OL]. [13 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4571371
 
 
Program obfuscation is a compiler that transfers the original program into an unintelligible form while preserving the functionality. It has practical applications such as software protection and digital watermarking and meaningful promotion in cryptography theory field. Secure obfuscation for several particular function families have been raised out in despite of the general impossibility result presented by Barak $et$ $al.$. All the existing results are proved under the security requirement of virtual black-box property. In this paper, we introduce the timed release primitive into the program obfuscation, which results in a new model - timed release obfuscation. It has the new property that the virtual black-box property will not be preserved after a given time period. The timed release property has practical usefulness in cryptographical field. The formal model of timed release obfuscation is given and we also construct a detailed function which satisfies this model.
Keywords:Cryptography; program obfuscation; timed release; software protection
 
 
 

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