Providing cybersecurity advisory content to startups to establish an effective cyber program

— Join former ICE and NYSE CISO Jerry Perullo as he explores the opportunities available to tech executives after retirement
The Risk Acceptance Myth

The notion of "Risk Acceptance" has always challenged me. For the uninitiated, Risk Acceptance is a concept often discussed in cybersecurity leadership when it comes to accountability for cyber debt. The idea is that cybersecurity leaders and other professionals identify risks and recommend mitigating actions that would reduce that risk, but recognize that it is always up to business leadership to weigh the costs and benefits of change and make a final decision. Risk Acceptance has always come u

Overrated? On TPRM, SBOM, Solarwinds, and Supply Chain Security

We've all run to the same side of the boat on supply chain security when it comes to cyber. Rather than chasing the Sisyphean (and antithetical to modern product-development philosophy) task of ensuring our suppliers deliver perfectly secure software, we should be expected to architect and deploy our dependencies with the assumption they will be compromised at some point, minimizing the amount of impact that could have and ensuring we could detect such an issue timely. To expound on it, I'll sa

Encryption is Overrated

Years ago I found myself in one of those awkward elevator pairings where you are unexpectedly face to face with your CEO. It's a particularly awkward spot when you are a CISO, as beyond the usual desperation to sound brilliant that most execs feel in that spot, the CEO these days also feels pressure to demonstrate "tone at the top", "executive buy-in", and "stakeholder oversight" when given the chance. In that particular vignette I doubled down on the awkwardness, as his quick cordial cyber com

Network Egress and Ingress Fundamentals

There is a lot of confusion about network ingress and egress. This isn't limited to junior staff; I've witnessed this many times among software engineers and technology leaders alike. Often only network and firewall engineers really comprehend the topic fully, though this should not be the case. A network connection must begin with an "initiator". This is usually thought of as a "client" in a traditional "client server" model. The client is defined not by their intention, purpose, or operating

Episode 07 - Bug Bounties with guest Casey Ellis

Bugcrowd founder Casey Ellis joins #lifeafterCISO to talk about bug bounty programs in the wake of the Joe Sullivan Uber trial. Whether you've been running bounty programs for years or just learned of them last week, this conversation will take you from basics straight into the most interesting and controversial bits. 01:25 The Joe Sullivan Uber trial and its impact on bug bounties 10:30 Clearing Assurance Debt: The initial wave of bounties 15:40 Ostrich Risk Management 22:55 Vulnerability D

Episode 06 - Retire Many Times with guest Sounil Yu

Sounil Yu joins the #lifeafterCISO podcast and shares the idea of "retiring many times". Sounil is the renowned author of the Cyber Defense Matrix and lauded by the CISO community for his ability to step back and view problems in a new light. Host Jerry Perullo and Sounil go on to look at the Equifax breach from a new angle, talk about CISO accountability, and finally offer up their early thoughts on the Twitter whistleblower report. 01:43 Returning to work as a CISO 10:30 Do CISOs spend too m

How much AppSec is too much?

I've been using the term "West Coast CISO" a lot lately. While it feels like CISOs used to be either network/infrastructure CISOs or risk manager CISOs, now the split is having to make room for the CISO heavily focused on code security. The image is one of a CISO born in the cloud, focused on delivering (security) bug-free code, and thus focusing architecturally on CI/CD, change control, and automation, to oversimplify. This emphasis on code is contrasted with network controls and discussion of

The value of the True Positive

As originally published on Vectra's Unfiltered at Cybersecurity is afflicted with the duty of “proving a negative” all the way up to the Board room. We can learn some tricks from incident response and threat intelligence to tackle the art of distinguishing the lucky from the good. When it comes to incident response, it is challenging – but essential – to define criteria for closing an investigation. Enter the true positive. When someone says that they did not see

Episode 01 - The Portfolio Life

In this introductory episode, host Jerry Perullo talks about the range of opportunities available to tech executives after the day job. Perullo leverages his 20 years of experience as the founding CISO of ICE and the New York Stock Exchange to discuss what you can do 3-5 years before leaving your post to get prepared. 00:08:43 Advisory Work 00:13:20 Consulting 00:16:00 Angel Investing 00:25:05 Board Directorship 00:35:12 Entrepreneurship 00:37:06 Teaching 00:39:12 Volunteering Episode

IOCs aren't for blocking - they are for control validation

There is a misconception out there that security departments should be ingesting feeds of Indicators of Compromise (IOCs) and loading them into firewalls, endpoint software, and proxy configurations as soon as possible. This perception is amplified by product marketing focused on the task, and it's easy to get caught up in the idea that this is our mission. By the time an IOC has been published in an intelligence report, there is a high likelihood it has been neutralized. Imagine a command & co

Patching is Overrated

Patching became a household term during the Equifax security breach and Congressional hearings. While IT maintenance and hygiene have their place in running a secure environment, over-emphasis can distract limited resources from more important tasks or trigger operational risks. Patches are only relevant when a security vulnerability is known and addressed by a vendor. So whether it is a 0-day vulnerability discovery without a patch yet available or just the unavoidable window between the time

It's not the 2FA.. it's the 1TP!!!

Multifactor authentication (MFA / 2FA) is arguably the most powerful security control deployed over the past 20 years. But it dawned on me that it isn't multi that's really getting it done. It's the fact that one of those factors has been a one-time-password (OTP or 1TP) in a token or app that changes every 60 seconds. The unwritten math about MFA is that a single factor is difficult to compromise, and thus two of them = difficult^2. But in reality our static credentials have become easy thanks