发明授权
US08966266B2 Method for obtaining encryption keys corresponding terminals, server and computer program products 有权
用于获取对应终端,服务器和计算机程序产品的加密密钥的方法

Method for obtaining encryption keys corresponding terminals, server and computer program products
摘要:
A method and apparatus for obtaining an encryption key for an item of data transmitted from a client to a server. The method includes: determining a number R of registers available within the client for carrying out a plurality of calculations of encryption keys; determining a maximum number N of iterations necessary for obtaining at least one encryption key at the server; obtaining a structure of data representative of a key calculation state effected within the R available registers; calculating the at least one encryption key as a function: —of the number of available registers R, by performing at most N calls to a pseudo-random function F and —of the data structure; so that the at least one encryption key can be obtained from a combination of at most T=CR+NN−1 encryption keys based on a secret previously shared between the server and client.
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