A defensive catalogue of how real cryptographic systems break in practice, not through broken mathematics but through nonce reuse, Electronic Code Book mode, unauthenticated encryption, weak key derivation, hardcoded and long lived keys, weak randomness, disabled certificate checks, downgrade attacks, timing side channels, home grown primitives and stale keys. Every failure gets a symptom, the class of real incident it causes, how a scanner or reviewer detects it, and the concrete fix, with no working attack code anywhere in the course.
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.
