Microsoft Technology Licensing, LLC

International Business Machines Corporation

Qixiang Sun

Yi-Min Wang

Daniel Ron Simon

Wilfred G Russell

Venkata N Padmanabhan

Lili Qiu

Daniel Charles Sturman

A system and method is provided for handling network communications between a client and a target server on the Internet to protect the privacy and anonymity of the client. For a session between the client and the target server, a routing control server sets up a routing chain using a plurality of Web servers randomly selected from a pool of participating Web servers as routers for routing messages between the client and the target server. To prevent traffic analysis, an 'onion encryption' scheme is applied to the messages as they are forwarded along the routing chain. A payment service cooperating with the routing control server allows a user to pay for the privacy protection service without revealing her real identity.

System and method for protecting privacy and anonymity of parties of network communications

A system and method is provided for evaluating the effectiveness of data encryption for hiding the identity of the source of Web traffic. A signature is constructed from encrypted Web traffic for a Web page sent by a target Web site, and the signature is compared with archived traffic signatures obtained by accessing various Web pages of interest in advance. If the signature of the detected encrypted Web traffic matches a stored traffic signature beyond a pre-set statistical threshold, a positive match is found, and the source of the traffic is identified. Countermeasures for reducing the reliability of source identification based on traffic signature matching are provided.

System and method for evaluating and enhancing source anonymity for encrypted web traffic

A group-based multicast messaging system implementing dedicated logger member for logging all multicast messages sent in the system, and a reliable recovery method for missing messages. The reliable recovery method includes soliciting retransmissions of fresh missing messages to other group members and soliciting of retransmissions of stale missing messages to logger members of the group. One of the loggers or other group members repairs the missing message to thereby ensure reliable delivery of messages in the multicast messaging system. The soliciting of retransmissions makes use of negative gossips for fresh missing messages in the system, with the system implementing a mechanism for propagating the latest state information of members to enable garbage collection of archived messages at logging servers in the system. Further, employed is a selective hashing technique to further reduce control traffic and a relaxed group membership protocol for tracking multicast group membership.

Gossip-based reliable multicast message recovery system and method

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Amarillo, TX, United States of America

Qixiang Sun