Digital signature is a useful primitive to attain the integrity and authenticity in various wire or wireless communications. Proxy signature is one type of the digital signatures. It helps the proxy signer to sign messages on behalf of the original signer. It is very useful when the original...

Proxy signature helps the proxy signer to sign messages on behalf of the original signer. It is very useful when the original signer (e.g. the president of a company) is not available to sign a specific document. If the original signer can not forge valid proxy signatures through impersonating...

En octubre de 2008 se publicó un misterioso artículo bajo el seudónimo de Satoshi Nakamoto: «Bitcoin: a peer-to-peer electronic cash system». Meses después, a principios de 2009, Bitcoin comenzó a operar sin generar apenas atención. Desde entonces hasta hoy, el esquema ha acumulado más...