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>_ connect via ssh
ssh app.hacktheflag.net
Works on macOS, Linux & Windows Terminal
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Online · Open · Global

Players from everywhere.
Flag from anywhere.

Hack The Flag is fully online. No venue, no visa, no barrier. Connect from wherever you are, compete against the world, prove yourself.

The competition

What is HTF?

Hack The Flag is a cryptography competition. You connect, you get a cipher, you break it. The output is a flag — submit it, earn points, climb the leaderboard.

No prior experience required. Every cipher is solvable. The only question is how fast.

A flag looks like this: <HTF-this_is_a_flag/>

Getting started

How it works

  1. 01
    Connect

    SSH into the competition server when the event goes live.

    ssh app.hacktheflag.net
  2. 02
    Solve

    Pick a cipher challenge. Break it — classical, modern, steganography, whatever it takes.

  3. 03
    Capture

    Every solved cipher reveals a flag. Submit it.

    <HTF-your_flag_here/>
  4. 04
    Repeat

    More flags, more points. The leaderboard updates live.