Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Protection at a particular protocol layer
Patent
1998-06-19
2000-10-24
Iqbal, Nadeem
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Protection at a particular protocol layer
380 25, G06F 1100
Patent
active
06138240&
ABSTRACT:
A security device and methodology that prevents unauthorized access to general purpose I/O pins in a computer system. In a system according to the invention, secure general purpose I/O pins are utilized as enable signals for data transfer devices such as Universal Serial Port (USB) ports. In one embodiment of the invention, access to the secure general purpose I/O pins is governed by an administrator password that is protected by a memory slot in a security device. When an administrator (or other authorized user) desires access to the general purpose I/O register that controls the secure general purpose I/O pins, the administrator enters the administrator password. If the password is correct, the relevant slot of the security device is unlocked, thereby permitting completion of write cycles to the secure general purpose I/O register. If a write cycle to the secure general purpose I/O register is attempted while the relevant slot in the security device is locked, the write cycle is ignored. Control and monitoring of various system resources in a secure manner is thereby permitted via use of the secure general purpose I/O pins.
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Simonich Christopher E.
Tran Robin T.
Compaq Computer Corporation
Iqbal Nadeem
LandOfFree
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