Abstract
Personal computers are often used in small office and home environment for different purposes ranging from general web browsing and e mail processing to processing data that are sensitive regarding their confidentiality and/or integrity. Common operating systems do not provide sufficient protection. We present asecurity model combining the well known benefits of mandatory access control in classified information processing systems with the typical home and small office computer use. We use a simple two-dimensional data classification scheme and present a security model with provable properties that significantly reduces the risks of confidentiality and/or integrity protection violation.
Highlights
IntroductionDuring the past few years we have been observing a significant increase in the number of people who use computers to perform tasks where security is important
While a larger organization can dedicate some computers to security-critical applications and protect them against unauthorized access, modification or software installation, it can hardly be expected in home or small office environments
We present a security model designed to protect confidentiality and integrity of data classified in terms of the confidentiality and integrity protection requirements in the home and small office environments
Summary
During the past few years we have been observing a significant increase in the number of people who use computers to perform tasks where security is important. Unauthorized access to information stored or processed by all of the mentioned applications (and many others) can often cause a substantial loss to the affected person or organization It is usually the user’s responsibility to protect the sensitive data. While a larger organization can dedicate some computers to security-critical applications and protect them against unauthorized access, modification or software installation, it can hardly be expected in home or small office environments. In such environments, the same computer is usually used for many different purposes – such as web browsing, e mail processing, running programs from untrustworthy sources, etc. The typical examples are text processors, spreadsheets, presentation software, graphic editors,
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