The Crypto Stamp Android application is now freely available through Google Play.
The application allows you to easily timestamp photos on your phone.
Also, it allows you to enable automatic stamping which periodically performs stamping for all of your photos.
You can turn it on and forget about it, later on you can always prove timestamps of your photos if it ever becomes necessary.
Hashes are computed on the phone and then sent to the server, so privacy of your photos are preserved.
Only sending hashes also means the application is quite efficient, requiring only minor bandwidth.
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