mbabuskov / mimic

[ab]using Unicode to create tragedy

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mimic

[ab]using Unicode to create tragedy

Introduction

monster

mimic provokes:

  • fun
  • frustration
  • curiosity
  • murderous rage

It's inspired by this terrible idea floating around:

MT: Replace a semicolon (;) with a greek question mark (;) in your friend's C# code and watch them pull their hair out over the syntax error

— Peter Ritchie (@peterritchie) November 16, 2014
<script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>

There are many more characters in the Unicode character set that look, to some extent or another, like others – homoglyphs. Mimic substitutes common ASCII characters for obscure homoglyphs.

Fun games to play with mimic:

  • Pipe some source code through and see if you can find all of the problems
  • Pipe someone else's source code through without telling them
  • Be fired, and then killed

Installation

Install from a local directory if you've cloned:

pip install -e .

Install straight from the repo:

pip install git+git://github.com/reinderien/mimic.git

Example usage

Before installation, invoke via python -m mimic. After, simply use mimic.

mimic --list           # Show all of the homoglyphs
mimic --explain=o      # What crazy things can we do with this letter?
mimic --me-harder 100  # Type some lines in and mess with every single char
mimic --reverse        # Undo the mayhem. Boooring.
cat somefile | mimic   # Pipe some source through at 1%

# Turn up the knob and save the results
cat somefile | mimic --me-harder 25 > mimicked

# Or, if your code acts strange, but you have seen this prank before:
cat mimicked | mimic --reverse > fixedfile
diff fixedfile somefile

Results

Observe the mayhem:

some bad code "BUT WHY?"

Or, if you've been mimicked a little harder,

some worse code

Solutions

vim-troll-stopper: vim plugin that alerts you by highlighting "troll" Unicode characters in red.

Discussion

People have noticed how terrible this is.

Reddit

ycombinator

See also

[Wikipedia: Unicode Equivalence] (https://en.wikipedia.org/wiki/Unicode_equivalence)

Wikipedia: IDN homograph attack

Online homoglyph generator

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[ab]using Unicode to create tragedy


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