Abstract

: This position paper discusses the problem of evaluating a function on an untrusted host, while maintaining the confidentiality of the function. A new non-interactive protocol designed to evaluate a function on an untrusted host is presented. The protocol prevents the disclosure of the function under cryptographic assumptions. Keywords: Mobile code protection, privacy of computations, malicious hosts. 1 Introduction With the advent of new computing paradigms like mobile code and ubiquitous computing, the privacy and integrity of software programs become a major concern beyond classical data security considerations. Running a program in a potentially hostile environment may raise various security requirements, as follows: - a company might need to prevent the disclosure of certain sensitive algorithms implemented in its software products despite extensive code analysis and reverse engineering by potential intruders including its customers; - a mobile software agent acting on behalf...

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