Applications of Multiple Trust Authorities in Pairing Based CryptosystemsL. Chen, K. Harrison, N. Smart, D. Soldera, Applications of Multiple Trust Authorities in Pairing Based Cryptosystems. Infrastructure Security : InfraSec 2002. G. Davida, Y. Frankel, O. Rees, (eds.), pp. 260–275. September 2002. No electronic version available.
We investigate a number of issues related to the use of multiple trust authorities and multiple identities in the type of identifier based cryptography enabled by the Weil and Tate pairings. An example of such a system is the Boneh and Franklin encryption scheme. We present various applications of multiple trust authorities. In particular we focus on how one can equate a trust authority with a way to add contextual information to an identity.