An agent computer system, acting on behalf of the user, provides the
personal information to various wide area network sites for conducting
online transactions. A user has a secure device with a built-in device
identifier. A backup center has a computer system to be coupled to the
secure device during backup of the personal information. The personal
information is encrypted with a unique user ID as a key. The user ID is
entered by the user. The user ID is irreversibly encrypted to a unique
irreversibly encrypted user identifier. The secure device includes data
executable to establish a new account, renew an old account, and
transmission of the encrypted information along with the unique device
identifier and the unique irreversibly encrypted user identifier to the
backup center. The unique device identifier and the unique irreversibly
encrypted user identifier are used for indexing the storage of the
encrypted information.