Apparatus and methods for granting access to computers

摘要: When a computer user is granted access to certain capabilities of he often given password signifying these capabilities. A problem arises in that unauthorized users may copy the and so gain In present invention an enciphered message relating stored tamper-resistant store circuit contained by token. The also holds secret key public encryption system distinctive can be transformed ("signed") using passed computer. corresponding then used carry out inverse transverse form check messages against signals sent from If this successful required granted. Preferably part message, especially where token grants distributed or fragmented system, since avoids necessity making keys available throughout system.