Vernam Cipher

About Vernam Cipher

Using this app, you can create and share secret keys that you can then use to encrypt and decrypt messages using the Vernam Cipher. This implementation acts as a one time pad as it discards the part of the key used to encrypt/decrypt messages.

Source code is available at https://github.com/jeffisaak/vernam_cipher

Changelog (from v1.1 onwards):

Version 1.10
- Upgraded Android SDK and Gradle versions.
- Updated the 'about' text.

Version 1.9:
- Fixed a couple of bugs that were causing crashes

Version 1.8
- Added a message to the user indicating their password protected secret keys are broken (terribly sorry everyone)

Version 1.7
- Fixed a bug that was causing secret key importing to fail.
- Fixed a bug that was causing password-protected secret keys to fail.

Version 1.6
- Fixed a bug that was causing the number of bytes remaining in a password-protected secret key to be misrepresented
- Added the display of the cipher text when decrypting a message.
- Added the ability to view a secret key (long press on a secret key in the list, then select 'View secret key').

Verison 1.5
- Fixed a bug that caused the app to crash when decryption was attempted with no secret keys generated

Version 1.4
- Fixed a bug that caused the app to crash on startup for new installations

Version 1.3
- Added ability to share encrypted messages as text or as a file - this opens up new sharing options
- Miscellaneous code cleanup
- Added a link to my donation page (yes, shameless self-promotion)

Version 1.2
- Fixed an error connecting to random.org

Version 1.1
- Fixed a rather crippling Nougat bug
- Expanded the error message when random.org data fetching fails