# Chroma-Hash

**Repository Path**: mirrors_mattt/Chroma-Hash

## Basic Information

- **Project Name**: Chroma-Hash
- **Description**: A colorful visualization of password field input
- **Primary Language**: Unknown
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-08-09
- **Last Updated**: 2026-04-11

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# Chroma-Hash

Password entry can be frustrating, 
especially with long or difficult passwords. 
On a webpage, secure fields obscure your input with •'s so others can't read it. 
Unfortunately, neither can you --- 
you can't tell if you got your password right until you click "Log In".

Chroma-Hash is a jQuery plugin that visualizes secure text-field values using ambient color bars.

Chroma-Hash displays a series of colored bars at the end of field inputs 
so you can instantly tell if your password is right. 
The script takes a hash of your input to compute the colors in the visualization;
the resulting color pattern is non-reversible, 
so no one can determine your password from the colors alone.

## Usage

```javascript
$("input:password").chromaHash({bars: 3, salt:"7be82b35cb0199120eea35a4507c9acf", minimum:6});
```

- `bars` : the number of bars displayed (1, 2, 3, or 4)
- `salt` : the value to be appended when calculating hash function
- `minimum` : the minimum number of characters needed for grayscale bars to be displayed in color

## Requirements

- jQuery 1.3+

## Ports, Implementations, and Adaptations

Chroma-Hash is also available in your choice of JavaScript libraries and languages:

- [CHChromaHashView (iOS) - @mattt (Mattt)](https://github.com/mattt/CHChromaHashView)
- [ChromaHashView (Android) - @michaelevans (Michael Evans)](https://github.com/MichaelEvans/ChromaHashView)
- [YUI3 - @foxxtrot (Jeff Craig)](http://github.com/foxxtrot/Chroma-Hash)
- [Prototype - @wki (Wolfgang Kinkeldei)](http://github.com/wki/Chroma-Hash)
- [pyChroma (Python) - @leegao (Lee Gao)](http://github.com/leegao/pyChroma)
- [ChromaHash4j (Java) - @efi (Thomas Efer)](http://github.com/efi/ChromaHash4j)

> For the more acoustically-inclined, 
> check out [Sonic-Hash](http://mattt.github.com/Sonic-Hash/), 
> which uses sounds instead of colors.

## Credit

Inspired by Arc90 Lab's HashMask, by Chris Dary
[http://lab.arc90.com/2009/07/hashmask.php](http://lab.arc90.com/2009/07/09/hashmask-another-more-secure-experiment-in-password-masking/)

Chroma-Hash uses Paul Johnston's Javascript MD5 implementation, and is distributed under the BSD License
See [http://pajhome.org.uk/crypt/md5](http://pajhome.org.uk/crypt/md5) for more info.

Thanks to [Ian Young](http://www.iangreenleaf.com/) for his [suggestion to represent color components in 4-bits](http://blog.iangreenleaf.com/2009/08/making-chroma-hash-less-leaky.html) to increase overall security.

## Contact

Mattt ([@mattt](https://twitter.com/mattt))

## License

Chroma-Hash is released under the MIT license. 
See the LICENSE file for more info.