Abstract: A system for preventing successful denial of service attacks comprises a first communication device, a second communication device, and a network. The first and second communication devices establish a communication session via the network. Based on various information, such as a pre-shared secret, one of the communication devices determines a network access filter value and compares this value to at least one data frame in order to authenticate such data frame without committing significant computing resource and any memory space. By updating the network access filter over time, an unauthorized user who discovers the outdated network access filter values is prevented from successfully launching a denial of service attack.

Abstract: The invention relates to thrombin compositions with reduced levels of high molecular weight impurities. In particular, the levels of factor Va, prions and/or viral agents are greatly reduced. Ts invention also relates generally to methods for the preparation of thrombin having a high degree of purity and high specific activity. More specifically, the invention encompasses steps to exclude high molecular weight impurities from thrombin preparations by size exclusion filtration. In additional embodiments, the preparation of thrombin additionally includes an ion exchange filtration step. The methods of the invention are particularly suited for large scale purification of thrombin. This invention also relates generally to stabilized formulations containing thrombin cormpositions. More specifically, the present invention relates to stabilized, liquid formulations containing thrombin having a high degree of purity and high specific activity and methods of making and using such formulations.

Abstract: A system for buffering data received from a network comprises a network socket, a plurality of buffers, a buffer pointer pool, receive logic, and packet delivery logic. The buffer pointer pool has a plurality of entries respectively pointing to the buffers. The receive logic is configured to pull an entry from the pool and to perform a bulk read of the network socket. The entry points to one of the buffers, and the receive logic is further configured to store data from the bulk read to the one buffer based on the entry. The packet delivery logic is configured to read, based on the entry, the one buffer and to locate a missing packet sequence in response to a determination, by the packet delivery logic, that the one buffer is storing an incomplete packet sequence. The packet delivery logic is further configured to form a complete packet sequence based on the incomplete packet sequence and the missing packet sequence.