NDLI: Beyond secure channels

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Beyond secure channels

Content Provider	ACM Digital Library
Author	Stewin, Patrick Unger, Martin Asokan, N. Sadeghi, Ahmad-Reza Gasmi, Yacine
Abstract	A Trusted Channel is a secure communication channel which is cryptographically bound to the state of the hardware and software configurations of the endpoints. In this paper, we describe secure and flexible mechanisms to establish and maintain Trusted Channels which do not have the deficiencies of previous proposals. We also present a concrete implementation proposal based on Transport Layer Security (TLS) protocol, and Trusted Computing technology. We use Subject Key Attestation Evidence extensions to X.509v3 certificates to convey configuration information during key agreement (TLS handshake). The resulting session key is kept within the Trusted Computing Base, and is updated in a predetermined manner to reflect any detected change in the local configuration. This allows an endpoint to detect changes in the configuration of the peer endpoint while the Trusted Channel is in place, and to decide according to a local policy whether to maintain or tear down the Trusted Channel.
Starting Page	30
Ending Page	40
Page Count	11
File Format	PDF
ISBN	9781595938886
DOI	10.1145/1314354.1314363
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2007-11-02
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Remote attestation Trusted computing Trusted channel Microkernel Hypervisor Relay attack Tls State changes Virtualization
Content Type	Text
Resource Type	Article

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