Browsing by Subject "analysis"

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    Attack analysis of cryptographic protocols using strand spaces
    (2003) Lukell, S A; Hutchison, A C M
    Security protocols make use of cryptographic techniques to achieve goals such as confidentiality, authentication and integrity. However, the fact that strong cryptographic algorithms exist does not guarantee the security of a communications system. In fact, it is recognised that the engineering of security protocols is a challenging task, since protocols that appear secure can contain subtle flaws that attackers can exploit. A number of techniques exist for the analysis of security protocol specifications. Individually they are not capable of detecting every possible flaw or attack against a protocol. However, when combined, these techniques all complement each other, allowing a protocol engineer to obtain a more accurate overview of the security of a protocol that is being designed. This is the rationale for multi-dimensional security protocol engineering, a concept introduced by previous projects of ours over several years. We propose an attack construction approach to security protocol analysis within a multi-dimensional context. This analysis method complements the existing inference construction analysis tools developed earlier in the group. We give a brief overview of the concepts associated with the project, including a summary of existing security protocol analysis techniques, and a description of the strand space model, which is the intended formalism for the analysis.
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    Is the golden hour optimally used in South Africa for children presenting with polytrauma?
    (2013) Zuidgeest, J; Jonkheijm, A; Van Dijk, M; Van As, A
    BACKGROUND: The major paediatric public health problem worldwide is injury or trauma. In 2004, 950 000 children died as a result of injury. OBJECTIVE: The aim of this study was to evaluate the logistics of medical care after paediatric polytrauma within the first hours after arrival into a trauma unit - the so-called Golden Hour. METHODS: Children presenting with polytrauma to the Trauma Unit at the Red Cross War Memorial Children's Hospital between May 2011 and August 2011 were considered for inclusion in the study. RESULTS: Fifty-five children were included in the final analysis. The median duration of stay in the Trauma Unit was 205 minutes (interquartile range 135 - 274). CONCLUSION: Several factors were identified that unnecessarily prolonged the time that patients stayed in the trauma unit following arrival in hospital for polytrauma management.