This paper presents a study of obfuscation practices in location-sharing systems. The study shows that users have relatively complex preferences that depend on the recipient of the location, the time of the request and location. The preferences also require multiple levels of obfuscation (ranging from disclosing no location information to disclosing the exact location) to accurately capture. Fo...

This paper presents a study of obfuscation practices in location-sharing systems. The study shows that users have relatively complex preferences that depend on the recipient of the location, the time of the request and location. The preferences also require multiple levels of obfuscation (ranging from disclosing no location information to disclosing the exact location) to accurately capture. Fo...

Providing effective methods of identification of high-obfuscation plagiarism seeds presents a significant research problem in the field of plagiarism detection. The conventional methods of plagiarism detection are based on single type of features to capture plagiarism seeds. But for high-obfuscation plagiarism detection, these single type features are not sufficient for identifying the plagiari...

We demonstrate that modern image recognition methods based on artificial neural networks can recover hidden information from images protected by various forms of obfuscation. The obfuscation techniques considered in this paper are mosaicing (also known as pixelation), blurring (as used by YouTube), and P3, a recently proposed system for privacy-preserving photo sharing that encrypts the signifi...

Existing de nitions of program obfuscation do not rule out malleability attacks, where an adversary that sees an obfuscated program is able to generate another (potentially obfuscated) program that is related to the original one in some way. We formulate two natural avors of non-malleability requirements for program obfuscation, and show that they are incomparable in general. We also construct ...

In the realm of protecting programs from illegitimate use, obfuscation offers a modicum of defense against malicious reverse engineering and tampering. As a field of study, obfuscation would benefit from a unifying framework that has solid theoretical foundation yet provides value in empirical study and implementation. The essence of obfuscation (in practice) is best described as a measurable l...

Computer and communication industries develop so rapidly that the demand for software becomes larger and larger and the demand for software protections, such as copyright and anti-tampering defense, are more and more important to software users and developers. There are some technical measures for software protections, such as hardware-based protections, network filters, cryptosystems, etc. Sof...

Privacy is defined as the freedom from unauthorized intrusion. The availability of personal information through online databases such as government records, medical records, and voters’ lists poses a threat to personal privacy. Intelligent search engines and data mining techniques further exacerbate the problem of privacy by simplifying access and retrieval of personal records. Data Obfuscation...

Unauthorized code modification based on reverse engineering is a serious threat for software industry. Virtual machine based code obfuscation is emerging as a powerful technique for software protection. However, the current code obfuscation techniques are vulnerable under semantic attacks which use dynamic profiling to transform an obfuscated program to construct a simpler program that is funct...