Confidential concurrency control for secure transaction management in database systems : C3 = 데이터베이스 시스템의 보안거래관리를 위한 기밀적 동시성 제어

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While a concurrency controller in multilevel secure database system synchronizes transactions cleared at different confidentiality levels, it should cope with the problem of covert channel. In this thesis, we propose a new concurrency control scheme for secure transaction management, named Confidential Concurrency Control scheme (C3) that founds on multiversion-based scheme. C3 maintains elaborated information about ordering relationships among transactions in a way of actively investigating and renewing the ordering relationships whenever it receives an operation. By utilizing the elaborated information, it becomes capable of aborting transactions selectively whose non-interfered executions definitely violate one-copy serializability. It can provide more recent data version to read request than the other multiversion-based secure concurrency control schemes in that it decides to select second-best version for read in only case that there is a high potential of confidentiality violation. It therefore comes to reduce the aborts and provide data versions with improved trustworthiness. By virtue of the elaborated information, moreover, C3 is able to delete unworthy versions and unworthy transactions, so that it lightens the burdens of maintaining multiple versions and accumulated transaction ordering relationships. For the aborts that are inevitable for preserving one-copy serializability, C3 preserves confidentiality by deriving the conflicts to be occurred between transactions of the same confidentiality level.
Advisors
Moon, Song-Chunresearcher문송천researcher
Description
한국과학기술원 : 정보및통신공학과,
Publisher
한국과학기술원
Issue Date
2000
Identifier
158286/325007 / 000929072
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 정보및통신공학과, 2000, [ xv, 260 p. ]

Keywords

Transaction management; Covert channel; Security; Concurrency control; Database management system; 데이타베이스 관리시스템; 거래관리; 비밀경로; 보안; 동시성제어

URI
http://hdl.handle.net/10203/39828
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=158286&flag=dissertation
Appears in Collection
ICE-Theses_Ph.D.(박사논문)
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