Abstract: Apparatus and methods for client identification in anonymous communication networks are provided to identify an anonymous client by guiding a network path selection algorithm to select from a small set of relays. A large percentage of the relays in the set are controlled, thus probabilistically forming a pathway connection in which the traffic is routed through the set of relays which are configured to identify client traffic. From the set of controlled relays, if both an entry node and an exit node are selected by the anonymous client, then client identification is possible. Path vulnerabilities are analyzed and results of the analysis determine a probability of selection of unpopular ports. A hidden program modifies the anonymous client machine and traffic from the anonymous client machine is routed through at least one unpopular port in the new path to determine the identity of the anonymous client machine.

Abstract: A computer based system accelerates code execution by speeding up method calls. A virtual machine includes a loader, interpreter and a thread manager. The loader constructing a hash-table using method signatures, and the interpreter searching the hash-table for locating methods. The interpreter using a method call cache having a pointer to a receiver for accelerating code execution. The thread manager using a depth level for accelerating locking state transitions.