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Defense in Depth

Defense in Depth

David Spark, Steve Zalewski, Geoff Belknap 362 Episodes Aug 20, 2026

Defense in Depth is a weekly cybersecurity podcast that tackles controversial and confusing debates in the InfoSec community. Each episode focuses on a single hot topic, leveraging insights from security professionals to drive the discussion. The show aims to provide clear, balanced analysis on issues that divide the industry.

Episodes

Will AI Replace Detection Roles in Cybersecurity?
Will AI Replace Detection Roles in Cybersecurity? Aug 20, 2026 35:13 All links and images can be found on CISO Series Check out this post from Caleb Sima of Whiterabbit for the discussion that is the basis of our conversation on this week's episode co-hosted David Spark, the producer of CISO Series, and Yaron Levi, CISO, Dolby. Joining is Adrian Ludwig, CSO, Rippling. In this episode: The messy middle The automatable part Where automation stops The influence ga
What Makes a Good AI Security Deployment?
What Makes a Good AI Security Deployment? Aug 13, 2026 31:19 What Makes a Good AI Security Deployment? All links and images can be found on CISO Series Check out this post by Chris Matthews of UpGuard for the discussion that is the basis of our conversation on this week's episode co-hosted by me, David Spark, the producer of CISO Series, and Edward Contreras, senior evp and CISO, Frost Bank. Joining us is Peter Liebert, CISO, Salesloft & Clari. In this epi
The Office Politics of Remediation
The Office Politics of Remediation Aug 6, 2026 28:48 All links and images can be found on CISO Series Check out this post for the discussion that is the basis of our conversation on this week's episode co-hosted by David Spark, the producer of CISO Series, and Dan Walsh, CISO, Datavant. Joining is our sponsored guest, Elizabeth Nammour, founder and CEO, Teleskope. In this episode: Data ownership before automation A shared vocabulary for agent risk
Why is Preventative Security So Difficult?
Why is Preventative Security So Difficult? Jul 30, 2026 30:16 All links and images can be found on CISO Series Prevention in cybersecurity is a lot like flossing: everyone knows they should do it, but few do it enough. What's stopping us? Check out this post by Ross Haleliuk of Venture in Security for the discussion that is the basis of our conversation on this week's episode co-hosted by me, David Spark, the producer of CISO Series, and Edward Contreras,
Identity and Access Management (IAM) in an Agentic AI World
Identity and Access Management (IAM) in an Agentic AI World Jul 23, 2026 30:20 All links and images can be found on CISO Series Check out this post by Tomás Maldonado, CISO, NFL, for the discussion that is the basis of our conversation on this week's episode co-hosted by me, David Spark, the producer of CISO Series, and Yaron Levi, CISO, Dolby. Joining is Will Gregorian, vp of information technology & security, Galileo Medical. In this episode: From who to what The manipu
Protecting AI Agents in O365 and Google Workspace
Protecting AI Agents in O365 and Google Workspace Jul 16, 2026 33:53 All links and images can be found on CISO Series Check out this post for the discussion that is the basis of our conversation on this week's episode co-hosted by David Spark, the producer of CISO Series, and Steve Zalewski. Joining is their sponsored guest, Rajan Kapoor, vp, security, Material Security. In this episode: Pre-existing conditions Architecture over rollout Access isn't legitima
Humans Are Bottleneck in a Machine-Speed World
Humans Are Bottleneck in a Machine-Speed World Jul 9, 2026 35:36   All links and images can be found on CISO Series We're evolving fast to secure AI. But are we evolving fast enough to secure WITH AI? Check out this post by Rinki Sethi, CSO, Upwind Security, for the discussion that is the basis of our conversation on this week's episode co-hosted by me, David Spark, the producer of CISO Series, and Howard Holton, former CEO, GigaOm. Joining is Adam Gli
Even With All These Security Vendors We Still Have Glaring Gaps
Even With All These Security Vendors We Still Have Glaring Gaps Jul 2, 2026 33:56 All links and images can be found on CISO Series There are thousands of cybersecurity vendors across categories. If there's a gap in the market, it's likely not for technical reasons. So, how do you actually find vendors that are a good fit rather than one that just meets technical requirements? Check out this post by Joe Head of REFLEX Solutions for the discussion that is the basis of our co
Is the "Attackers Only Need to Be Right Once" a Misnomer?
Is the "Attackers Only Need to Be Right Once" a Misnomer? Jun 25, 2026 27:40 All links and images can be found on CISO Series Check out this post for the discussion that is the basis of our conversation on this week's episode co-hosted by me, David Spark, the producer of CISO Series, and George Finney, CISO, University of Texas System. Joining is Sean Walls, CISO, Bob's Discount Furniture. In this episode: Asymmetric accounting Sometimes it really is that easy The s
What It Takes To Be Successful in Cyber Media
What It Takes To Be Successful in Cyber Media Jun 18, 2026 55:27 What It Takes To Be Successful in Cyber Media All links and images can be found on CISO Series Check out this post for the discussion that is the basis of our conversation on this week's episode co-hosted by me, David Spark, the producer of CISO Series, and Dave Bittner, producer and host, The CyberWire. Joining is Graham Cluley, host of Smashing Security podcast and Leo Laporte, founder of T
CISOs Buy For Selfish and Politically Risk-Averse Reasons (Not Because Your Product is the Best)
CISOs Buy For Selfish and Politically Risk-Averse Reasons (Not Because Your Product is the Best) Jun 11, 2026 31:21 All links and images can be found on CISO Series Check out this post for the discussion that is the basis of our conversation on this week's episode co-hosted by me, David Spark, the producer of CISO Series, and Howard Holton, CEO, GigaOm. Joining is Tyler King, senior director - threat operations and response, Sinclair. In this episode: Career insurance In the trenches together Who are you
Has Cybersecurity Become a Cult?
Has Cybersecurity Become a Cult? Jun 4, 2026 33:57 All links and images can be found on CISO Series We think of cybersecurity as a discipline. But when do ideas like best practices and NIST frameworks change into a system of belief? Check out this post for the discussion that is the basis of our conversation on this week's episode co-hosted by David Spark, the producer of CISO Series, and Davi Ottenheimer, principal, Flying Penguin. Joining is

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