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Secrecy by Typing and File-Access Control Avik Chaudhuri Martin Abadi

Summary: Secrecy by Typing and File-Access Control
Avik Chaudhuri Mart´in Abadi
Computer Science Department
University of California, Santa Cruz
Secrecy properties can be guaranteed through a combi-
nation of static and dynamic checks. The static checks may
include the application of special type systems with notions
of secrecy. The dynamic checks can be of many different
kinds; in practice, the most important are access-control
checks, often ones based on ACLs (access-control lists). In
this paper, we explore the interplay of static and dynamic
checks in the setting of a file system. For this purpose, we
study a pi calculus with file-system constructs. The calcu-
lus supports both access-control checks and a form of static
scoping that limits the knowledge of terms--including file
names and contents--to groups of clients. We design a sys-
tem with secrecy types for the calculus; using this system,
we can prove secrecy properties by static typing of pro-
grams in the presence of file-system access-control checks.


Source: Abadi, Martín - Department of Computer Science, University of California at Santa Cruz


Collections: Computer Technologies and Information Sciences