Patent ID: 7225169

Claim:
A method of performing electronic commerce without a candidate customer being forced to disclose private data together with an identity of the candidate customer, to a business entity requiring said private data, said method comprising: establishing an intermediary relationship with a third party between the candidate customer and the business entity; providing a proprietary item to said customer such that the customer can be identified as a legitimate owner of the item without revealing the identity of said customer; performing electronic commerce between said customer and said business entity through said third party, utilizing said proprietary item and a document; and replacing, by said third party, identification data of said candidate customer in said document with an identifier, and transmitting said document including said identifier to said business entity, such that an identity of said customer is kept from said business entity, wherein said business entity is provided with information identifying said customer as a transactional party in said electronic business transaction, wherein a Fourth Party delivers to the customer a portable device P(C) which carries biometrics of the customer such that the customer can be identified as a legitimate owner of the portable device P(C) without revealing the identity of said customer, wherein the device P(C) delivers a number S(C) at each transaction, and the number S(C) is readable from the portable device P(C) only in the presence of the customer, wherein said portable device P(C) generates numbers S(C,n), where n is an integer belonging to a set {1, 2, . . . , N}, and wherein for at least one of a new business entity and another partner of the customer, a new number n is chosen for all further transactions between the customer and said at least one of said new business unit and said another partner.