In addition, the DS1957B can store hundreds of user names and passwords, a color ID picture and the application programs of many different service providers. Because the i Button is carried on a key chain, it is always close at hand.
Button can span personal, corporate, financial and governmental applications.
Button can be updated for Web-based applications not yet invented. Because its memory contents can be revised after issuance as often as desired, future software can be downloaded from the Internet, adding new services to the i Button. This security protocol requires keeping the key private at all costs. If logically attacked, the firewall of the i Button prevents access to the private keys. If physically attacked, the i Button has a tamper response that erases the private key rather than reveal it in order to preserve confidentiality.