Locked In: Prep for CISSP

Locked-In is a bite-sized study companion for the (ISC)2 Certified Information Systems Security Professional (CISSP) exam. Built for working security pros who study in 10-minute windows — on the train, on lunch, or between meetings. Every lesson is short, focused, and ends with a quick-check so you know what stuck. WHAT'S INSIDE - All 8 CISSP exam domains, broken into bite-sized lessons - Visual diagrams for key concepts — security models, OSI layers, cryptography, IAM, network architecture, the risk lifecycle, and more - Inline quick-checks at the end of each lesson - A practice bank of 320 multiple-choice questions, organized by domain and difficulty - Scenario-style questions with detailed answer explanations - A full 50-question, 75-minute timed mock exam with flag-for-review and a final review screen - Flashcard deck of must-know terms with SM-2 spaced repetition - Searchable glossary covering every acronym you'll see on test day - Progress tracking, streaks, bookmarks, and personal notes - Weak-spot review that surfaces the topics you keep missing WHO IT'S FOR - Security analysts and engineers preparing for the CISSP alongside a day job - IT pros moving into security management and governance roles - Career changers building toward a senior security credential WHY LOCKED-IN - Works fully offline — no account, no tracking, no ads - One-time unlock, no subscription - Content aligned with the current CISSP exam outline FREE TIER AND FULL UNLOCK Domain 1's first topic is fully free, plus a preview lesson from every other domain. The one-time $14.99 unlock opens everything — all 8 domains, the full 320-question practice bank, every flashcard, and the timed mock exam. Not affiliated with, endorsed by, or sponsored by (ISC)2. CISSP and (ISC)2 are registered marks of International Information System Security Certification Consortium, Inc. Locked-In is an independent study aid.