1. The dining cryptographers problem: unconditional sender and recipient untraceability;Chaum;J. Cryptol.,1988
2. Crowds: anonymity for Web transactions;Reiter;ACM Trans. Inf. Syst. Secur.,1998
3. P. Syverson, D. Goldschlag, M. Reed, Anonymous connections and onion routing, in: IEEE Symposium on Security and Privacy, Oakland, California, 1997, pp. 44–54.
4. Freenet: a distributed anonymous information storage and retrieval system;Clarke,2000
5. Group principals and the formalization of anonymity;Syverson,1999