Public key/signature cryptosystem with enhanced digital signature certification

摘要: A public key cryptographic system is disclosed with enhanced digital signature certification which authenticates the identity of holder. hierarchy nested certifications and signatures are employed indicate authority responsibility levels individual whose being certified. The certifier in constructing a certificate generates special message that includes fields identifying certified, name certifiee. constructed by to define granted may relate wide range authorizations, delegation responsibilities or restrictions given to, placed on Methodology also multiple objects such as, for example, cover letter, an associated enclosed graphics file, etc., signed together. digitally signing documents generated both computer verification reverification if document needs be reconfirmed reentering from paper rendition.