Denial-of-service attacks (DoS) and distributed denial-of-service attacks (DDoS) attempt to
temporarily disrupt users or computer resources to cause service un-availability to legitimate …

Distributed denial of service (DDoS) attacks pose great threat to the Internet and its public
services. Various computation-based cryptographic puzzle schemes have been proposed to …

We provides an evaluation of non-parallelizable puzzles used to prevent DoS in
authentication protocols. With an evaluation based on a simulation and performance …

Various cryptographic puzzle schemes have been proposed as defenses against Denial of
Service (DoS) attacks. However, these schemes have two common shortcomings that …

Cryptographic authentication systems are currently the de facto standard for securing clients
access to network services. Although they offer enhanced security for the parties involved in …

Denial and Distributed Denial-of-Service attacks continue to be easy to carry while wreaking
havoc on todays' Internet. This paper examines the feasibility of implementing video …

Cryptographic puzzles are promising techniques for mitigating DDoS attacks via decreasing
the incoming rate of service eligible requests. However, existing cryptographic puzzle …

Client puzzles, a type of cryptographic puzzle, have been proposed and developed by many
scholars to guarantee network security. In this paper, we proposed C2Puzzle, a novel …