NDLI: On the computational soundness of cryptographically masked flows

Content Provider	ACM Digital Library
Author	Laud, Peeter
Abstract	To speak about the security of information flow in programs employing cryptographic operations, definitions based on computational indistinguish ability of distributions over program states have to be used. These definitions, as well as the accompanying analysis tools, are complex and error-prone to argue about. Cryptographically masked flows, proposed by Askarov, Hedin and Sabelfeld, are an abstract execution model and security definition that attempt to abstract away the details of computational security. This abstract model is useful because analysis of programs can be conducted using the usual techniques for enforcing non-interference. In this paper we investigate under which conditions this abstract model is computationally sound, i.e. when does the security of a program in their model imply the computational security of this program. This paper spells out a reasonable set of conditions and then proposes a simpler abstract model that is nevertheless no more restrictive than the cryptographically masked flows together with these conditions for soundness.
Starting Page	337
Ending Page	348
Page Count	12
File Format	PDF
ISSN	03621340 15581160
DOI	10.1145/1328897.1328479
Journal	ACM SIGPLAN Notices (SIGP)
Volume Number	43
Issue Number	1
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1983-05-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Secure information flow Encryption Computational soundness Cryptographically masked flows
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Software

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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