Darren Anstee

Darren Anstee is Chief Technology Officer, SBO International, NETSCOUT. Anstee has 20 years of experience in pre-sales, consultancy and support for telecom and security solutions. As Chief Technology Officer, SBO International, at NETSCOUT, Darren works across the research, strategy, and pre-sales aspects of Arbor's traffic monitoring, threat detection and mitigation solutions for service providers and enterprises around the world. He is an integral part of Arbor's Security Engineering & Response Team (ASERT).

Disappearing DNS: DoT and DoH, Where one Letter Makes a Great Difference

Darren Anstee

February 6, 2020

There seems to be a consensus for advocates of private Internet use that encryption is a good thing, and that encryption of DNS is needed to prevent network operators from gaining visibility into the sites and services their users lookup (and then visit). Two protocols have been created to achieve this encryption: DNS over TLS (DoT) and DNS over HTTPS (DoH). While both offer encryption of DNS data using the same TLS protocol, there are some very important differences:

The Rise of the Internet of Things

Darren Anstee

January 20, 2020

They are already here. And they might already outnumber us.

LIVE: August 19, 2026 at 2 PM EDT We'll examine where AI can deliver meaningful value, where incomplete context or black-box reasoning can introduce risk, and what governance, validation, and evidence-traceability controls organizations should establish.

LIVE: August 25, 2026 at 2 PM EDT Learn why critical infrastructure security has become a national security imperative, and the strategies organizations can adopt to improve visibility, collaboration, and response across their security operations.

Darren Anstee

ARTICLES

Disappearing DNS: DoT and DoH, Where one Letter Makes a Great Difference

The Rise of the Internet of Things

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