Integrating encrypted mobile agents with smart homes
NTMS'09 Proceedings of the 3rd international conference on New technologies, mobility and security
An agent-based framework for inhabitants' untraceability in ubiquitous environments
Proceedings of the 7th International Conference on Advances in Mobile Computing and Multimedia
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Sander and Tschudin proposed mobile code protection scheme - evaluation of encrypted functions implemented by homomorphisms based on exponentiation and Goldwasser Micali, but no homomorphisms enable to hide the skeleton and equal coefficient information of a polynomial. To solve the problems, an idea of approximate decryption and a new revised ElGamal are proposed in this paper. Three new public-key homomorphisms based on the new ElGamal (HNE) are defined. Security analyses show that HNE can resist known-plaintext attacks and chosen-ciphertext attacks. The problems of leaks about polynomial skeleton and equal coefficient are solved when HNE are used to encrypt polynomials. Then non-interactive evaluation of encrypted polynomials can be securely performed on a remote malicious host.