Computer system protection

Details Computer system protection Computer system protection

2001-12-24

2008-07-08

Zand, Kambiz (Department: 2134)

Electrical computers and digital processing systems: support

Computer virus detection by cryptography

Reexamination Certificate

active

07398400

ABSTRACT:
Computer system protection to protect against harmful data from an external computer network (60) (e.g. the Internet) involves supplying incoming data (62) to a software checker (64) as the data enters a computer system (not shown). The checker (64) routes any suspect data (66) to an encryptor (68) which encrypts it to render it unusable and harmless. Encrypted data passes to a computer (72) in an internal network (74) and having a desktop quarantine area or sandbox (76) for suspect data. The computer (72) runs main desktop applications (78) receiving encrypted data (70) for storage and transfer, but not for use in any meaningful way because it is encrypted. Equally well applications (78) cannot be interfered with by encrypted data (70) because encryption makes this impossible. On entry into the sandbox (76), the encrypted data (70) is decrypted to usable form it then becomes accessible by software (204) suitable for use in the sandbox (76) subject to sandbox constraints.

REFERENCES:
patent: 5623600 (1997-04-01), Ji et al.
patent: 6006328 (1999-12-01), Drake
patent: 6691230 (2004-02-01), Bardon
patent: 6986052 (2006-01-01), Mittal
patent: 2315575 (1998-02-01), None
eSafe Protect for Windows 95, Virus Bulletin, Apr. 1998, pp. 20-23.
Anad, et al. “A Flexible Security Model for Using Internet Content”, IEEE, pp. 89-96 (1997).
Islam et al., “A Flexible Security System for Using Internet Content”, IEEE pp. 52-59 (1997).

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