Authenticated key agreement protocol is exploited to share a secret key for encrypting information being transferred between two or additional parties over a public network. In this implementation can produce multiple public keys for a corresponding private key. In this paper, an alternative key generation technique is proposed for certificate less public key cryptography in order to have one public key for one private key. This will improve the security features of the relevant key generation.

1. A. Shamir. Identity-based cryptosystems and signature schemes, In G. R. Blakley and D. Chaum, editors, Advances in Cryptology - CRYPTO'84, volume 196 of Lecture Notes in Computer Science, pages 47-53. Springer-Verlag, 1985.
2. S. S. Al-Riyami and K. Paterson. Certificateless Public Key Cryptography. In C. S. Laih, editor, Advances in Cryptology - Asiacrypt 2003, volume 2894 of Lecture Notes in Computer Science, pages 452-473. Springer-Verlag, 2003.
3. T. K. Mandt and C. H. Tan, "Certificateless authenticated two-party key agreement protocols," in Proc. ASIAN'06, Berlin, Heidelberg: Springer-Verlag, 2007, p. 37–44.
4. G. Lippold, C. Boyd, and J. Gonzalez Nieto, "Strongly secure certificateless key agreement," in Proc. Pairing '09, Berlin, Heidelberg, Germany: Springer- Verlag, 2009, p. 206–230.
5. S. Wang, Z. Cao, and H. Bao, "Efficient certificateless authentication and key agreement (cl-ak) for grid computing," International Journal of Network Security, vol. 7, no. 3, pp. 342–347, 2006.
6. Y. Sun and F. Zhang, "Secure certificateless public key encryption without redundancy," Cryptology ePrint Archive, Report 2008/487, 2008, http://eprint. iacr. org/.
7. B. Libert and J. jacques Quisquater, "On constructing certificateless cryptosystems from identity based encryption," in PKC 2006. Springer- Verlag, 2006, p. 474–490.
8. Morteza Arifi, An ID-Based Key Agreement Protocol Based on ECC Among Users of Separate Networks, International Journal of Computer Science and Security, 2012.
9. P. S. L. M. Barreto, H. Y. Kim, B. Lynn, M. Scott, "Efficient Algorithms for Pairing-Based Cryptosystems," Advances in Cryptology -- Crypto'2002, Lecture Notes on Computer Science 2442, Springer-Verlag (2002), pp. 354--368.
10. Z. Zhang and D. Feng. On the Security of a Certificateless Public-Key Encryption. Cryptology ePrint Archive, Report 2005/426.
11. A. W. Dent and C. Kudla. On Proofs of Security for Certificateless Cryptosystems. Cryptology ePrint Archive, Report 2005/426.

Authenticated Key Agreement Key Generation Certificate Less Public Key Cryptography Identity-based Public Key Cryptography Efficiency Security