Security Proof of Sakai-Kasahara's Identity-Based Encryption Scheme Export

@misc{citeulike:4893683, abstract = {Identity-based encryption (IBE) is a special asymmetric encryption method where a public encryption key can be an arbitrary identifier and the corresponding private decryption key is created by binding the identifier with a system's master secret. In 2003 Sakai and Kasahara proposed a new IBE scheme, which has the potential to improve performance. However, to our best knowledge, the security of their scheme has not been properly investigated. This work is intended to build confidence in the security of the Sakai-Kasahara IBE scheme. In this paper, we first present an efficient IBE scheme that employs a simple version of the Sakai-Kasahara scheme and the Fujisaki-Okamoto transformation, which we refer to as SK-IBE. We then prove that SK-IBE has chosen ciphertext security in the random oracle model based on a reasonably well-explored hardness assumption.}, author = {Chen, Liqun and Cheng, Zhaohui}, citeulike-article-id = {4893683}, citeulike-linkout-0 = {http://eprint.iacr.org/2005/226}, day = {12}, howpublished = {Cryptology ePrint Archive, Report 2005/226}, keywords = {ibe, pairings}, month = {Jul}, posted-at = {2009-06-18 16:00:03}, priority = {2}, title = {Security Proof of Sakai-Kasahara's Identity-Based Encryption Scheme}, url = {http://eprint.iacr.org/2005/226}, year = {2005} }

TY - ELEC ID - citeulike:4893683 L3 - citeulike-article-id:4893683 N2 - Identity-based encryption (IBE) is a special asymmetric encryption method where a public encryption key can be an arbitrary identifier and the corresponding private decryption key is created by binding the identifier with a system's master secret. In 2003 Sakai and Kasahara proposed a new IBE scheme, which has the potential to improve performance. However, to our best knowledge, the security of their scheme has not been properly investigated. This work is intended to build confidence in the security of the Sakai-Kasahara IBE scheme. In this paper, we first present an efficient IBE scheme that employs a simple version of the Sakai-Kasahara scheme and the Fujisaki-Okamoto transformation, which we refer to as SK-IBE. We then prove that SK-IBE has chosen ciphertext security in the random oracle model based on a reasonably well-explored hardness assumption. TI - Security Proof of Sakai-Kasahara's Identity-Based Encryption Scheme KW - ibe KW - pairings AU - Chen, Liqun AU - Cheng, Zhaohui PY - 2005/Jul/12/ UR - http://eprint.iacr.org/2005/226 ER -