초록 ▼

A value transfer system which allows value to be transferred between electronic purses comprises computer which controls the loading of purses with value and the redemption of value from purses, a special bulk purse or purses and a value meter securely linked thereto which registers the total net va

A value transfer system which allows value to be transferred between electronic purses comprises computer which controls the loading of purses with value and the redemption of value from purses, a special bulk purse or purses and a value meter securely linked thereto which registers the total net value issued to the bulk purse or purses. Draw-down of value and redemption of value transactions are effected with the bulk purses.

대표청구항 ▼

[ We claim:] [1.] A value transfer system, said system comprising:a computer system;a plurality of electronic purses;at least one exchange device whereby said purses communicate with each other to transfer value in transactions which are off-line from the computer system; anda cryptographic key syst

[ We claim:] [1.] A value transfer system, said system comprising:a computer system;a plurality of electronic purses;at least one exchange device whereby said purses communicate with each other to transfer value in transactions which are off-line from the computer system; anda cryptographic key system under which communication between purses is effected, each purse storing one or more cryptographic keys and including a microprocessor, wherein, in a transaction between a first purse having a microprocessor of a first computing power and a second purse having a microprocessor of a second computing power, said first power being superior to said second power, the microprocessors are programmed to send to the first purse a secret key of the second purse.