Huawei Technologies Co., Limited

Sony Corporation

Shanghai Jiaotong University

Zhenfu Cao

Xiaolei Dong

Jiwei Wei

Zhibin Zheng

Jun Shao

Xiaohui Liang

Dongsheng Xing

Rongxing Lu

Zhenchuan Chai

Huang Lin

The embodiments of the present disclosure disclose a method and apparatus for reducing the parameter transmission bandwidth. The parameter sender reduces the values of the parameters before sending the parameters to the parameter receiver. This scheme reduces the bandwidth consumed during parameter transmission, thus makes the transmission more efficient. The embodiment of the present disclosure also discloses a method for key exchange. This method reduces the values of the transmission parameters before sending the transmission parameters. This saves the bandwidth compared with the protocol in the prior art. Besides, the embodiment of the present disclosure discloses a system for key exchange. The parameter sender sends the transmission parameters to the bandwidth processing unit. The bandwidth processing unit performs a modulo operation on the received transmission parameters and then sends the processed transmission parameters to the parameter receiver, thus reducing the bandwidth consumed in the transmission of transmission parameters.

Method and system for key exchange and method and apparatus for reducing parameter transmission bandwidth

The embodiments of the present disclosure disclose an authentication method, a system, a server, and a user node are disclosed herein. The method includes: generating, by a server, a server session key according to the identity information, at least one login information parameter, and the validity period included in the login information, generating at least one session key parameter of a user node according to the generator point of the algebraic curve, and sending at least one session key parameter of the user node to the user node; generating, by the user node, a user node session key according to at least one session key parameter of the user node; performing, by the server and the user node, mutual authentication according to the session keys. The authentication solution under the present disclosure is simple and practicable, and is also applicable to authenticating the user node in a grid computing platform.

Authentication method, system, server, and user node

Methods and apparatuses for key generation, encryption and decryption in broadcast encryption. A public parameter and a primary key based on a first random number are generated. For each of leaf nodes in a binary tree, a right key set of the leaf node is calculated, the right key set including a right key of the leaf node and right keys of right brother nodes for all the nodes on a path from a root node to the leaf node. A left key set of the leaf node is calculated, the left key set including a left key of the leaf node and left keys of left brother nodes for all the nodes on the path. The sum of the second and third random numbers equals to the first random number. The second random number is different for different subscribers.

Methods and apparatuses for key generation, encryption and decryption in broadcast encryption

The present invention discloses a method and system for remote password based authentication using smart cards for accessing a communications network. The disclosed method does not require a remote authentication sever to maintain a table of passwords for all users. The disclosed method and system also support mutual authentication. It not only prevents the illegal use of system resources by an impersonator, the user can also authenticate the identity of the remote authentication server.

Method and system for remote password based authentication using smart cards for accessing a communications network

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Shanghai, China

Zhenfu Cao