Latest COVID-19 Information for Purdue University

The Center for Education and Research in Information Assurance and Security (CERIAS)

The Center for Education and Research in
Information Assurance and Security (CERIAS)

Jonathan Millen - Mitre

Students: Fall 2021, unless noted otherwise, sessions will be virtual on Zoom.

Covert Channels

Jan 30, 1997

Abstract

A Trojan horse might attempt to send sensitive information belonging to its user to whoever wrote or planted the program. In most systems this is easy because a program runs with the privileges of its user. Systems with "mandatory" access controls make the attacker's job harder because they prevent obvious subversions such as copying files or sending messages to unauthorized parties. However, it is usually possible to bypass those controls by leaking information one bit at a time through shared operating system resources, sometimes at tens or hundreds of bits per second. This talk gives some examples of covert channels and discusses the problem of detecting them and estimating leakage rates.


About the Speaker




Ways to Watch

YouTube

Watch Now!

Over 500 videos of our weekly seminar and symposia keynotes are available on our YouTube Channel. Also check out Spaf's YouTube Channel. Subscribe today!