alphaPlan · Play
Games and practice
Learn by doing. Short games, interactive tools and guided exercises, each with about how long it takes.
Daily challenge
One quick question a day · build your streak.
Today's term
Which term means: Turning data into a short fixed 'fingerprint' that shows if it changed, but cannot be turned back.
Reveal
hashing
Why: Two files with the same fingerprint are identical; a different one means it changed.
№ 01 · Games
Term MatchMatch each definition to the right term, round after round. Beat your best.~3 min№ 02 · Quiz arcade
Quiz arcadeAll the quiz cards in one place, flip to check.~6 min№ 03 · Interactive tools
Spot the phishing
Find the red flags in a real-looking message.
~4 minCaesar cipher
Encrypt a message, then crack one back.
~4 minRisk matrix
Sort risks by how bad they'd be and how likely they are.
~3 minBig-O race
How fast does your code stay?
Race two ways of doing the same job and see which stays fast as it grows.
~3 minSequence sorter
Put the steps of an attack in the right order.
~3 min