Recently, Tsai and Hsiang et al. each proposed a multi-server authentication protocol. They claimed their protocols are secure and can withstand various attacks. However, after our analysis, we found some security loopholes in each protocol. We will first show the attacks on their schemes and then present ours. After the security analysis, we conclude that our scheme is the most secure one amon...

Multiplayer network games attract more and more interest nowadays. In order to make the system scalable, the multi-server architecture is introduced. In such systems, as the dynamic behavior of the users in the virtual world may result in significant workload imbalance between servers, a dynamic load sharing and transferring mechanism is crucial to achieve both quick response time and high thro...

We consider an overloaded multi-server multi-class queueing model where customers may abandon while waiting to be served. For class i, service is provided at rate μi , and abandonment occurs at rate θi . In a many-server fluid regime, we show that prioritizing the classes in decreasing order of ciμi/θi asymptotically minimizes an ergodic holding cost, where ci denotes the equivalent holding cos...

Outsourcing computation has gained significant popularity in recent years due to the prevalence of cloud computing. There are two main security concerns outsourcing computation: how guarantee server performs correctly and keep client's data secret. The single-server verifiable (SSVC) Gennaro, Gentry Parno (Crypto'10) enables a client delegate function f on any input x with both highly relieved,...