BigSpeed Peer-to-Peer SDK Version 1 descriptions BigSpeed Peer-to-Peer SDK is a set of two COM components that lets you set up a virtual private peer-to-peer network for secure file sharing & messaging. The transfered data are scrambled using on-the-fly 128-bit AES encryption without need of SSL certificates. NAT traversal is implemented by using TCP hole-punching technology. The security is provided in two different modes: symmetric encryption with shared secret key and asymmetric encryption with 1024-bit public/private keys. The hub is responsible for keeping information on & authentication of online peers. All peers connected to a particular hub build a single private community. Each agent acts as both a client & a server at the same time. Fine grained access control is realized by a user-oriented permissions. They grant access control privileges to system resources & services in a flexible & secure manner. Two different kind of instant information can be exchanged between peers: alert & chat messages. In addition to standard FTP operations such as upload download rename delete etc. the SDK also offers several advanced features. The broken file transfers are resumed automatically with MD5 integrity checking. The agent is able to run search operation on the peers. The server module is able to perform file compression & decompression by a request from the remote client module. There is an option to compress on-the-fly the outgoing data before encrypting which may reduce greatly the transfer time for large files. BigSpeed Peer-to-Peer SDK utilizes an elegant event-driven paradigm for easy integration into Windows applications. A special attention is paid to provide responsive user interface while avoiding multithreading problems & maintaining maximum bandwidth efficiency. Sample applications are included in VB . NET VB 2005 & Delphi 7.