In 1996, Mambo et al. first introduced the concept of a proxy signature scheme, and discussed the delegation of the signing capability to a proxy signer. In 2001, Lee et al. cons...
Microsoft has proposed an identity metasystem to standardize identity services and the principles behind them. A location metasystem can support interoperation between location se...
In the online world every person has to hold a number of different data sets so as to be able to have access to various e-services and take part in specific economical and social ...