变形性：杀毒软件技术面临的一项数学挑战
Metamorphism: A mathematical challenge for antivirus technology
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中文总结 AI 辅助
本文指出变形病毒的变形性可通过van Wijngaarden文法实现，这给杀毒软件带来需嵌入判定该文法语言的图灵机的数学挑战。
中文摘要 AI 辅助
野外环境中目前最先进的计算机病毒是变形病毒，它具备将自身代码变异为数量极多、高度相似且功能完全相同副本的独特能力，这种变形性与其他高级混淆技术结合，使得现有市场上的杀毒软件几乎无法检测到这类病毒。本文表明，通过使用van Wijngaarden文法完全可以实现病毒变形性，因此杀毒软件面临的挑战是要嵌入能够判定该文法生成语言的图灵机。
英文摘要
Metamorphic viruses, currently the most advanced computer viruses in the wild, have the unique ability of mutating their own code virtually into infinitely many highly dissimilar copies of themselves that nevertheless have the same functionality. This ability -- metamorphism -- together with other advanced ob- fuscation techniques makes these computer viruses virtually undetectable by the antivirus software available in the market today. In this paper, we show that viral metamorphism is fully attainable by the employment of van Wijngaarden grammars. The challenge then for an antivirus software is to embed the Turing machine that decides the language generated by the grammar.
