1. Moderately hard, memory-bound functions;Abadi;ACM Transactions on Internet Technologies,2005
2. IP traceback: a new denial-of-service deterrent;Aljifri;IEEE Security and Privacy,2003
3. DOS-resistant authentication with client puzzles;Aura,2001
4. Security mechanism for the internet;Bellovin;IETF RFC,2003
5. Blazek, R., et al. (2001). A novel approach to detection of DoS attacks via adaptive sequential and batch-sequential change-point detection methods. Proceedings on IEEE workshop information assurance and security.