A randomized protocol for signing contracts
Communications of the ACM
All-or-nothing disclosure of secrets
Proceedings on Advances in cryptology---CRYPTO '86
Efficient identification and signatures for smart cards
CRYPTO '89 Proceedings on Advances in cryptology
Non-interactive oblivious transfer and applications
CRYPTO '89 Proceedings on Advances in cryptology
Protecting data privacy in private information retrieval schemes
STOC '98 Proceedings of the thirtieth annual ACM symposium on Theory of computing
Journal of the ACM (JACM)
Oblivious transfer and polynomial evaluation
STOC '99 Proceedings of the thirty-first annual ACM symposium on Theory of computing
Communications of the ACM
Proofs of Partial Knowledge and Simplified Design of Witness Hiding Protocols
CRYPTO '94 Proceedings of the 14th Annual International Cryptology Conference on Advances in Cryptology
The Decision Diffie-Hellman Problem
ANTS-III Proceedings of the Third International Symposium on Algorithmic Number Theory
Replication is not needed: single database, computationally-private information retrieval
FOCS '97 Proceedings of the 38th Annual Symposium on Foundations of Computer Science
Non-Interactive CryptoComputing For NC1
FOCS '99 Proceedings of the 40th Annual Symposium on Foundations of Computer Science
Cryptographic Security for Mobile Code
SP '01 Proceedings of the 2001 IEEE Symposium on Security and Privacy
Secure distributed key generation for discrete-log based cryptosystems
EUROCRYPT'99 Proceedings of the 17th international conference on Theory and application of cryptographic techniques
Single database private information retrieval implies oblivious transfer
EUROCRYPT'00 Proceedings of the 19th international conference on Theory and application of cryptographic techniques
Advanced mobile agent security models for code integrity and malicious availability check
Journal of Network and Computer Applications
A verifiable distributed oblivious transfer protocol
ACISP'11 Proceedings of the 16th Australasian conference on Information security and privacy
Hybrid approach for secure mobile agent computations
MADNES'05 Proceedings of the First international conference on Secure Mobile Ad-hoc Networks and Sensors
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The mobile agent is a fundamental building block of the mobile computing paradigm. In mobile agent security, oblivious transfer (OT) from a trusted party can be used to protect the agent's privacy and the hosts' privacy. In this paper, we introduce a new cryptographic primitive called Verifiable Distributed Oblivious Transfer (VDOT), which allows us to replace a single trusted party with a group of threshold trusted servers. The design of VDOT uses two novel techniques, consistency verification of encrypted secret shares and consistency verification through re-randomization. VDOT protects the privacy of both the sender and the receiver against malicious attacks of the servers. We also show the design of a system to apply VDOT to protect the privacy of mobile agents. Our design partitions an agent into the general portion and the security-sensitive portion. We also implement the key components of our system. As far as we know, this is the first effort to implement a system that protects the privacy of mobile agents. Our preliminary evaluation shows that protecting mobile agents not only is possible, but also can be implemented efficiently.