Spaced-repetition flashcards across 543 SecOps concepts. FSRS-5 algorithm schedules each card by your retention. Rate Again / Hard / Good / Easy; cards reappear when memory says they should.
Card states are stored in browser localStorage under key nexus_fsrs_v1. Export to back up or move to another browser.
Free Spaced Repetition Scheduler v5 (Open Spaced Repetition Project) replaces the older SM-2
algorithm used by Anki defaults. FSRS predicts retrievability based on stability and difficulty
per card, then schedules the next review at your target retention rate (default 90%).
Implementation lives in docs/javascripts/fsrs.js; see source for the 19 weights.
Educational note: the cards in this tool are auto-generated from the knowledge-graph node titles + descriptions. They are SOC-foundational starter cards, not a curated deck. For exam prep against a specific cert, supplement with a curated deck from the chapter you're studying.