An overview of computer security

Summers, Rita C.

doi:10.1147/sj.234.0309

Cited by 12 publications

(7 citation statements)

References 40 publications

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“…Time and power are close, and must be, for what is power but the attempt to control time, buy time, bide time. 1…”

Section: Thesis Structurementioning

confidence: 99%

“…Have eyes to wonder, but lack tongues to praise. 1 To define the present in isolation is to kill it. 2…”

Section: Diagnosing the Presentmentioning

confidence: 99%

“…For technological man it is time that occupies the same role. 1 Security is an inherently temporal proposition. In the modern political philosophical tradition, security is an essential bulwark against the exigencies of an unknowable future.…”

Section: Introductionmentioning

confidence: 99%

“…3 In our own time, the philosopher Alfred North Whitehead would remark: 'It is impossible to meditate on time and the mystery of the creative passage of nature without an overwhelming emotion at the limits of human intelligence'. 4 These limits are keenly felt by all who would engage with the problem 1 Jan Nederveen Pieterse, 'Aesthetics of Power: Time and Body Politics', Third Text 7, no. 22 (1999): 33.…”

Section: Introduction: From Time To Temporalitymentioning

confidence: 99%

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Cyber Security and the Politics of Time

Stevens

2015

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Time is an under-represented topic in security studies and International Relations (IR). The development and implementation of security measures are often justified as necessary responses to the contemporary rate of global change yet little attention is granted time and temporality as factors influencing the politics and practices of security. This thesis proposes that security can be understood within the framework of a 'politics of time' (chronopolitics), in which collective perceptions of time and temporality are constitutive of security politics and practices. Its principal object is cyber security, which aims to regulate and exploit complex sociotechnical systems of networked and interdependent information technologies. The thesis examines how cyber security actors imagine time and temporality in (post)modernity and the implications of these temporal biases for the politics of cyber security. It explores how cyber security actors imagine the accelerating present and the relative deceleration of political decision-making; how apocalyptic narratives of imminent catastrophe illustrate concerns about the immanent dangers of technology; how the past is mobilised through historical analogies to understand dystopian futures; how the future is metaphorically inhabited through preparedness exercises and simulations, and literally populated through education, training and recruitment. These 'chronotypes' inform the cyber security imaginary and disclose a manifold of deeper chronopolitical tendencies, theorised here as the logics of assemblage, real time, event, and eschaton. The thesis makes an original contribution to IR by promoting the interdisciplinary analysis of time to help understand the politics and practices of contemporary security. DeclarationThe copyright of this dissertation rests with the author and no quotation from it or information derived from it may be published without proper acknowledgement. ContentsAcknowledgements …………………………………………………………………………………….……...

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“…Time and power are close, and must be, for what is power but the attempt to control time, buy time, bide time. 1…”

Section: Thesis Structurementioning

confidence: 99%

“…Have eyes to wonder, but lack tongues to praise. 1 To define the present in isolation is to kill it. 2…”

Section: Diagnosing the Presentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introduction: From Time To Temporalitymentioning

confidence: 99%

See 2 more Smart Citations

Cyber Security and the Politics of Time

Stevens

2015

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“…The past thirty years or more has seen a number of security models developed, meeting complementary requirements for security in computer systems. [10,11] Experimental and "small run" operating systems have been developed and deployed using these models but none, outside the basic "access control list (ACL)" structure has really been accepted in mass market operating systems and allied software products.…”

Section: Themes and Challengesmentioning

confidence: 99%

Modernising MAC: New Forms for Mandatory Access Control in an Era of DRM

Caelli

2007

New Approaches for Security, Privacy and Trust in Complex Environments

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By its definition "discretionary access control" or "DAC" was not designed or intended for use in the untrusted environment of current globally connected information systems. In addition, DAC assumed control and responsibility for all programs vested in the user; a situation now largely obsolete with the rapid development of the software industry itself. However, the superior "mandatory access control" or "MAC" specifications and resulting implementations proved to be unacceptable for commercially oriented systems and their managers. For example, the USA's National Security Agency's (NSA) "Secure LINUX" or "SELinux", program made available under open source arrangements in 2000, aims at changing this state so that the benefits of MAC technology could be used to "harden" commodity ICT products. This paper analyses the need to abandon DAC, suggests variations and enhancements to basic access control concepts and relates the technology to the particular requirements of the "home computer". However, the potential for this technology to be used to limit competition must also be considered as a new participant is considered, i.e. the "owner" of software or allied systems wishing to impose digital rights management (DRM) requirements on the legitimate user.

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Accelerated convergence for Newton‐type iterations applied to multicomponent distillation problems

Billingsley

1984

AIChE Journal

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corresponds to the phase contours and Eq. lob to the x-axis so that the resulting plot conforms to the conventional Nichols chart. Figure 2 illustrates this from where it can be Seen that incorporation of Eqs. 6, lOa, and lob as above into the Nichols chart makes it so generalized and versatile as to permit both open-and closed-loop process identification. Thus, in addition to the usual M and a contours plotted on the A and 6 coordinates, Figure 2 also provides loci of constant A and 6 superimposed on the M and a coordinates. It may be noted from the chart that, while the M and A values coincide, the a and 6 values differ from each other by a constant factor of 180" as per Eqs. 10a and lob. Using Figure 2 the closedloop (or open-loop) identification is achieved by the usual procedure of entering the chart through A and 6 (or M and a) coordinates, and reading of M and a (or A and 6) contour values by interpolation. Any existing computer program describing the conventional Nichols chart may also be used for open-loop identification simply by incorporating Eqs. 6, 10a and lob into the program. NOTATION A = open-loop magnitude ratio C = controlled variable G(s) G* (s) = open-loop process transfer function = closed-loop process transfer function i = 4-1 M = closed-loop magnitude ratio R = set point W = frequency, radians/time Greek Letters a 6 = closed-loop phase angle, degrees = open-loop phase angle, degrees LITERATURE CITED Coughanowr, D. R., and L. B. Koppel, Process Systems Analysis and Deshpande, P. B., "Process Identification of Open-loop Unstable Systems," Koppel, L. B., "Sampled Data Control of Unstable Processes," Znd. Eng. Luyben, W. L., "Sample-Data Control of Second-Order Open-loop Un-Luyben, W. L., "Effect of Reaction Rate on the Open-Loop Stability of Luyben, W. L., and M. Melcic, "Consider Reactor Control Lags," Hydroc. Control, McGraw Hill, New York (1965). AfChE

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An overview of computer security

Cited by 12 publications

References 40 publications

Cyber Security and the Politics of Time

Cyber Security and the Politics of Time

Modernising MAC: New Forms for Mandatory Access Control in an Era of DRM

Accelerated convergence for Newton‐type iterations applied to multicomponent distillation problems

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