Abstract: An information processing system for protecting against denial of service attacks comprises an interface (310) to receive and send packets, wherein the packets comprise at least one synchronization packet that is part of a handshake process for establishing the connection between the source client computer (118) and the target server computer (102); a crypto engine (306) adapted to create a unique sequence number for inclusion in a packet to be sent to a client (118) requesting establishment of a connection between a client (118) and server (102), wherein the crypto engine (306) is further adapted to validate unique sequence numbers in received synchronization packets that are part of a handshake process for establishing the connection between the source client (118) and the protected server (102); and a lookup table (304) for storing information defining established connections between the server (102) and clients so that arriving packets that purport to be part of an established connection can be validated

Abstract: A system and method for prefetching instructions from a slower memory for storing them in a faster memory includes the following: prefetching the instructions from a slower memory; recognizing an opcode corresponding to an unconditional branch instruction; continuing to prefetch at a target address of the unconditional branch instruction, responsive to recognizing the opcode corresponding to the unconditional branch instruction; recognizing an opcode corresponding to a conditional branch instruction; prefetching along each of the possible branches for the conditional branch instruction, responsive to recognizing the opcode corresponding to the conditional branch instruction; taking a branch from the possible branches of the conditional branch; and canceling prefetching of other possible branches not taken.