UNIX Time-Sharing System: A Retrospective†

Ritchie, Dennis M.

doi:10.1002/j.1538-7305.1978.tb02138.x

Cited by 31 publications

(5 citation statements)

References 4 publications

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“…The *nix access control primarily follows from the original UNIX access control model [34,33]. In this discretionary access model, each file system object (file, directory, links) has an associated owner who controls the access to that object.…”

Section: *Nix Access Controlmentioning

confidence: 99%

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Privacy analysis and enhancements for data sharing in *nix systems

Singh

Liu

Ahamad

2008

IJICS

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Linux and its various flavors (together called *nix) are growing in mainstream popularity and many enterprise infrastructures now are based on *nix platforms. An important component of these systems is the ingrained multi-user support that lets users share data with each other.In this paper, we first analyze *nix systems and identify an urgent need for better privacy support in their data sharing mechanisms. In one of our studies it was possible to access over 84 GB of private data at one organization of 836 users, including over 300,000 emails and 579 passwords to financial and other private services websites. The most surprising aspect was the extremely low level of sophistication of the attack. The attack uses no technical vulnerabilities, rather inadequacies of *nix access control combined with user/application's privacy-indifferent behavior.We present two solutions to address this problem: (1) an administrative auditing tool which can alert administrators and users when their private data is at risk, and (2) a new View Based Access Control (VBAC) model which provides stronger and yet convenient privacy support. We also describe a filesystem based implementation and performance analysis of VBAC. A unique property of our implementation is that individual users can choose to switch on/off the VBAC access control model. Our evaluations with three well-known filesystem benchmarks show very little overhead of using VBAC. For example, our implementation resulted in only 3% total overhead with the popular Andrew Benchmark.

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Section: *Nix Access Controlmentioning

confidence: 99%

“…The *nix access control model follows primarily from the original UNIX access control [34,33]. It is a discretionary access control (DAC) model [16] and access is granted based on the identity of the subject (user or user group).…”

Section: *Nix Access Control Modelsmentioning

confidence: 99%

Privacy analysis and enhancements for data sharing in *nix systems

Singh

Liu

Ahamad

2008

IJICS

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“…1971-1990, July-Aug. 1978 This clearly written article describes how the Unix shell appears to the user. Bell System Technical Journal, vol.…”

Section: Articlesmentioning

confidence: 99%

The UNIX™ System Guidebook

Silvester¹

1988

Springer Books on Professional Computing

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“…The specific similarity to the UNIX system organization [25] is probably not coincidental, although it was not conscious. There are significant differences, however.…”

Section: Overall Organizationmentioning

confidence: 99%

Design of the S system for data analysis

Becker

Chambers

1984

Commun. ACM

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S is a language and system for interactive data analysis and graphics. It emphasizes interactive analysis and graphics, ease of use, flexibility, and extensibility. While sharing many characteristics with other statistical systems, S differs significantly in its design goals, its implementation, and the way it is used. This paper presents some of the design concepts and implementation techniques in S and relates these general ideas in computing to the specific design goals for S and to other statistical systems.' UNLX is a trademark of AT&T Bell [.aboriitories. © 1984 ACM 0001-0782/84/0500-048G 75C

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UNIX Time-Sharing System: A Retrospective†

Cited by 31 publications

References 4 publications

Privacy analysis and enhancements for data sharing in *nix systems

Privacy analysis and enhancements for data sharing in *nix systems

The UNIX™ System Guidebook

Design of the S system for data analysis

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