Vernam Cipher

Vernam Cipher

By Jeff Isaak

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Using this app, you can create and share secret keys that you can then use to encrypt and decrypt messages utilizing the Vernam Cipher. This implementation acts as a one time pad because it discards the a half 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 consumer indicating their password protected secret keys are broken (terribly sorry everyone)

Version 1.7

- Fixed a bug that was inflicting 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 variety of bytes remaining in a password-protected secret key to be misrepresented

- Added the display of the cipher textual content when decrypting a message.

- Added the power to view a secret key (long press on a secret key within the record, 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 triggered the app to crash on startup for model 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 somewhat crippling Nougat bug

- Expanded the error message when random.org knowledge fetching fails