1. Adida, B., Hohenberger, S., Rivest, R.L.: Lightweight Encryption for Email. In: Proceedings of Usenix’s Symposium on Reducing Unwanted Traffic on the Internet (SRUTI 2005) (July 2005)
2. Ateniese, G., Fu, K., Green, M., Hohenberger, S.: Improved proxy re-encryption schemes with applications to secure distributed storage. In: Proceedings of the 12th Annual Network and Distributed System Security Symposium (NDSS), San Diego, CA, February 3-4 (2005)
3. Bentley, D., Rose, G.G., Whalen, T.: ssmail: Opportunistic Encryption in sendmail. In: Proceedings of the 13th Usenix Systems Administration Conference (LISA) (1999)
4. Lecture Notes in Computer Science;M. Blaze,1998
5. Boneh, D., Franklin, M.: Identity based encryption from the Weil pairing. SIAM Journal of Computing 32(3), 586–615 (2003)