Patent ID: 7747540

Claim:
A computer system, the computer system comprising: a processor unit; and a computer-readable storage medium storing instructions that, when executed by the processor unit, cause the processor unit to: generate a first encryption key and a second encryption key different from the first encryption key, the computer system using the first encryption key to encrypt communications with a first web site, and the computer system using the second encryption key to encrypt communications with a second web site; receive a request to link a first user account with a second user account, the computer system receiving the request from the first web site, the first user account being associated with the first web site, the second user account being associated with the second web site; present a first option to link the first user account and the second user account, the first option being presented to a user of the computer system; generate a coupon comprising a linking agreement, the first encryption key, and the second encryption key in response to the user of the computer system approving linking between the first user account and the second user account; present a second option to the user of the computer system to forward the coupon to the first web site directly from the computer system; and forward the coupon to the first web site when the user selects the second option.