On the relations between non-interactive key distribution,identity-based encryption and trapdoor discrete log groups |
| |
Authors: | Kenneth G. Paterson Sriramkrishnan Srinivasan |
| |
Affiliation: | (1) Information Security Group, Royal Holloway, University of London, Egham, Surrey, TW20 0EX, UK |
| |
Abstract: | This paper investigates the relationships between identity-based non-interactive key distribution (ID-NIKD) and identity-based encryption (IBE). It provides a new security model for ID-NIKD, and a construction that converts a secure ID-NIKD scheme satisfying certain conditions into a secure IBE scheme. This conversion is used to explain the relationship between the ID-NIKD scheme of Sakai, Ohgishi and Kasahara and the IBE scheme of Boneh and Franklin. The paper then explores the construction of ID-NIKD and IBE schemes from general trapdoor discrete log groups. Two different concrete instantiations for such groups provide new, provably secure ID-NIKD and IBE schemes. These schemes are suited to applications in which the Trusted Authority is computationally well-resourced, but clients performing encryption/decryption are highly constrained. |
| |
Keywords: | Identity-based encryption Identity-based non-interactive key distribution Trapdoor discrete logs |
本文献已被 SpringerLink 等数据库收录! |
|