Research interests

• Proxy Signatures
• Signatures with message recovery
• Threshold Signatures
• Zero-knowledge Proofs for signatures
• Group Oriented Cryptography
• Secret Sharing
• Digital Signatures
• Public-key Cryptographic Protocols

1. Nonrepudiable Threshold Proxy Signatures With Traceability Property (with C. Nagore), Far East Journal of Applied Mathematics Vol. 6(3)(2002), pp. 233-240.

2. Signature scheme with message recovery and its application, International Journal of Computer Mathematics, Vol. 81(3) (2004), pp.285-289.

3. On Designatedly Verified (Non-interactive) Watermarking Schemes (with T. Okamoto & E. Okamoto), Cryptology ePrint Archive: Report 2005/120.

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