[Ssc-dev] JavaMediaHasher for verifying JPEG images

[Nathan of Guardian]

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Here is our standalone utility for producing SHA-1 pixel hashes from
JPEGs. It requires Java and a command line, which is easy to be had on
Mac (Terminal), Windows (Command shell), or Linux.

java -jar dist/JavaMediaHasher.jar <image path>

for example:
> java -jar dist/JavaMediaHasher.jar 12345.jpg 
> 0a0033e4ca746247901fae9297a2706ec34d7308

The hash value returned is the SHA-1 hash of the RGB values of each
pixel in the photo. It should be able to be used to search on j3m.info
for any file shared there. It can also be matched against the
pixelhash value that InformaCam allows you to post/send using the
"Share IDs" feature.

Download JAR: https://guardianproject.info/releases/JavaMediaHasher.jar
GPG Sig: https://guardianproject.info/releases/JavaMediaHasher.jar.asc

Source: https://github.com/n8fr8/JavaMediaHasher
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