安全多方計算的研究主要是針對在分散環境下的兩造(或多方)之間,如何在不透露彼此私有的資料的情況下,計算一個約定函數的問題,並要確保除了計算結果及其可能推導出的資訊,不會洩漏額外的私有資料。依此設計出來的函數算法,稱為安全的多方計算協定(protocol)。
過去兩年本實驗室根據一套基於向量內積運算(scalar product)發展出的安全多方計算方法,設計了一個雛型的分散式系統框架,開發了一套符合其安全要求的常用算數運算函數庫。
但目前個別的應用問題在此系統上發展安全協定的程式時,使用者必須相當熟悉其架構與程式庫細節,才能開發所需程式,造成推廣上的障礙。有鑑於此,本論文採用領域專屬語言(domain-specific language)的方法與技術,針對一般安全多方協定程式的特徵來進行歸納與分析,找出協助其表達計算步驟的適當抽象機制,並在設計上訂定了以下目標:
1. 設計一高階語言用以描述多方安全計算,以提供使用者撰寫安全多方計算程式。
2. 檢查並確保使用者撰寫的程式不會有資訊洩漏。
3. 多方安全運算執行上能保持一定的效率。
4. 建立多方安全計算的運算流程,讓PDL與現有的運作環境配合,達到各伺服器合作運行多方安全計算的目的。
朝向這四個目標發展出一套協定描述語言與其編譯器。以便與SMC-Protocol以及其環境合作,協助領域專家以更簡便的方式來設計與實驗更多的安全多方協定。我們稱此語言為多方安全計算協定描述語言(Protocol Description Language, PDL)。 / Protocols for secure multi-party computation (SMC) allow participants to share a computation while each party learns only what can be inferred from their own inputs and the output of the computation.
In the past two years, we developed an SMC implementation framework for both integers and floating numbers which comprises a set of arithmetic operations that manipulate secret values among involved parties using the scalar product protocol as the basis. Such a library of arithmetic operations is call building blocks.
But using this library is not easy. To solve individual SMC problem, programmer should knowing the given framework and protocol detail very well. This difficulty makes them won't consider this framework while facing the need of SMC.
To ease the writing of more complex user-defined protocols, using the technique of domain-specific language, this thesis analysis the general needs of SMC, develop a domain-specific language of SMC, and implement a compiler that coverts this language to SMC code, which is executable code composed of the protocols of given framework. We called this language Protocol Description Language, PDL.
Identifer | oai:union.ndltd.org:CHENGCHI/G0987530161 |
Creators | 黃文楷, Huang, Wen Kai |
Publisher | 國立政治大學 |
Source Sets | National Chengchi University Libraries |
Language | 中文 |
Detected Language | English |
Type | text |
Rights | Copyright © nccu library on behalf of the copyright holders |
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