Security '01 Abstract
SC-CFS: Smartcard Secured Cryptographic File System
Naomaru Itoi, Center for Information Technology Integration, University of Michigan, Ann Arbor
Storing information securely is one of the most important roles
expected for computer systems, but it is difficult to achieve with current
commodity computers. The computers may yield secrets through
physical breach, software bug exploitation, or password guessing
attack. Even file systems that provide
strong security, such as the cryptographic file system, are not
perfect against these attacks. We have developed SC-CFS, a file system that encrypts files and takes advantage of a
smartcard for per-file key generation. SC-CFS counters password
guessing attack, and minimizes the damage caused by physical attack and
bug exploitation. The performance of the system is not yet
satisfactory, taking 300 ms for accessing a file.
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