The hardest measurement problem in security, worked honestly. It begins with why fewer incidents is not proof, in five specific ways, and with the counterfactual problem stated plainly: to know whether your programme improved your security you would need to observe the year you did not have. From there it sets out what can actually be demonstrated, with a four part admission test, and works each measure arithmetically on hypothetical data: control coverage against a denominator you did not produce yourself, time to remediate compared as two distributions where the middle and the tail disagree, escape rate per release and the recurrence of a defect class, and the exposure window on issues publicly known to be exploited. A module on before and after comparison covers the five conditions such a comparison must meet, the discipline of choosing it before you see the result, and four confounds worked line by line: a new scanner, a scope change, a reorganisation and seasonality. The course then covers what an auditor means by improvement and what a customer's security review means by it, both of which are about evidenced process rather than a number, and closes with a four sentence answer to the question a board eventually asks and the two page case you can defend for a year. No industry, sector or peer figure is quoted anywhere, and the course explains at length why that is a refusal rather than an omission.
Nothing. Every course, exam, and certificate on the catalog is free — including retakes. All you need is a free Safeguard account.
None. The flagship course, Safeguard Certified Practitioner, is a beginner-level course — basic familiarity with how software is built helps, but every exam question is answerable from the lessons themselves.
You can retake it after a 24-hour cooldown, as many times as you need. Retakes are free, and each attempt draws a fresh random set of questions.
The Safeguard Certified Practitioner credential is valid for 24 months from issue. The expiry date is printed on the certificate and shown live on its public verification page. Renewing means passing the current exam again.
