Wes Widner - The Sound of Evil

Recorded at Knoxville's 5th annual BSides on May 3rd, 2019 Our ears are the original nexus of information security. The environments we're in are constantly streaming valuable information to us. All we have to do is listen properly. "Let he who has ears" and all that. Join me as we explore the fascinating world of audio security. We'll cover: - some meta information about audio - the basics of digital signal processing - the fascinatingly complex world of determining what "silence" means - modern machine learning approaches to sound event detection - attacks on audio interfaces like Alexa