Abstract: A system for controlling access to computing-device resources and files based on user authentication, comprising: a) a Policy Specification Interface (PSI) configured to allow an administrator to configure system access policies per execution context, specified as either a program execution path or a process ID; b) a Policy Enforcement Driver (PED) configured to receive input and output (I/O) requests from an I/O manager of the computing device and decide how to handle each I/O request according to the system access policies; and c) a Challenge-Response Generator (CRG) configured to present a challenge to a user in order to recognize a bot or a human user.

Abstract: A method for error detection includes storing in an associative memory multiple data entries, each data entry including a data item together with one or more check symbols computed with respect to the data item. A predetermined sequence of search keys is applied to the memory, thereby causing the memory to generate, in parallel, match results with respect to the data entries. The match results are processed in order to identify an error in at least one of the data entries.

Abstract: A method for error detection includes storing in an associative memory (24, 50, 70) multiple data entries (30), each data entry including a data item (28) together with one or more check symbols (40) computed with respect to the data item. A predetermined sequence of search keys (32) is applied to the memory, thereby causing the memory to generate, in parallel, match results with respect to the data entries. The match results are processed in order to identify an error in at least one of the data entries.

Abstract: A coprocessor performs an overhead function of a Java virtual machine executing in a main processor. The coprocessor includes memory access circuitry configured to access a memory also accessible by the host processor. Pointer receiving circuitry is configured to receive at least one pointer to data in the memory pertinent to the overhead function. Function performing circuitry is configured to perform the overhead function to operate on the data in the memory pointed to by the at least one pointer. Result passing circuitry configured to pass a result back to the main processor. For example, overhead functions that may be performed by the coprocessor include bytecode verification, just-in-time compiling and garbage collection.

Abstract: Archive files can be streamed from a server to a client device by extracting individual files from the archive and streaming the extracted files from the server to the client device. The received files can then be stored at the client device for access by an application. A new archive file may be formed at the client device to contain the received streamed files. Predictive critiera may be used to determine the order in which the extracted files are streamed from the server to the client device.