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Communications of the ACM

Research Archive


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The Research archive provides access to all Research articles published in past issues of Communications of the ACM.

February 2017


From Communications of the ACM

A Messy State of the Union: Taming the Composite State Machines of TLS

A Messy State of the Union

We systematically test popular TLS implementations and find unexpected transitions in many of their state machines that have stayed hidden for years. We show how some of these flaws lead to critical security vulnerabilities. 


From Communications of the ACM

Technical Perspective: Cleaning Up Flaws in TLS Implementations

One unfortunate fact about protocols is that as they get older and applied to more scenarios — and TLS is used basically everywhere — they tend to gain weight. A truism of the security community is that "complexity is the enemy…


From Communications of the ACM

Authentication Using Pulse-Response Biometrics

Authentication Using Pulse-Response Biometrics

We propose a new biometric based on the human body's response to an electric square pulse signal, called pulse-response.