multiset 中文意思是什麼
multiset
解釋
多集-
It is shown that the proposed refinement approaches have the commonly expected properties : the behaviour of the refined process can be inferred compositionally from the behaviour of the original process and from the behaviour of the processes substituted for actions ; the timed extensions of pomset partially ordered multiset trace equivalence and history preserving bisimulation equivalence are both congruences under the refinement ; the syntactic and semantic refinements coincide up to the aforementioned equivalence relations with respect to a cpo - based denotational semantics
然而，對于並發系統來說，時間指標是一個至關重要的因素，很多現實生活中的並發系統都跟時間密切相關，另外，緊急事件在實時並發系統中也是常見的現象，在已研究的動作精化理論當中緊急事件都僅僅只限於用來模擬超時事件，並且是不能被精化的，這對于很多現實系統來說是一個很大的限制。 -
The design and analysis of block ciphers are the hotspots in the field of information security. recently people presented multiset attack which includes square attack 、 collision attack and integral attack to attack block cipher with square - like structure. later multiset attack is also used to attack block ciphers whose structure is not square - like. this paper discusses basic theory, methods, application of the multiset attack
分組密碼的設計與分析是目前信息安全領域中的熱點問題，新出現的分組密碼基本上都採用了結構非常清晰的sp網路結構，針對這種結構的分組密碼，人們提出了multiset攻擊，包括square攻擊、碰撞攻擊和積分攻擊。 -
Obviously rc6 is not square - like cipher. square attack can only attack few rounds of rc6, because the data - rotations of rc6 affact the rules of propagation for active and passive words, which makes square attack ineffective. we analyse the square attack against serpent which is bit - oriented cipher, and the result shows that square attack on serpent is weak, because the bit - oriented linear operations interrupt the rules of propagation for active and passive multiset
我們將square攻擊應用於rc6密碼，發現square攻擊只能攻擊少數幾輪rc6 ，這主要是因為rc6的數據依賴循環運算打亂了活動位元組和固定位元組的傳播路徑，使得攻擊無法進行。我們分析了對serpent密碼的square攻擊， serpent密碼的按比特線性混合運算打亂了所構造multiset的傳播路徑，使得攻擊只能進行到3輪serpent密碼。
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