About this app

Written by A. Peirson using MIT's AppInventor
NB, The Caesar Cipher used in this App is highly unsecure.

While the Ceasar Cipher might keep the casual observer from reading your texts,
it will pose no problem for the NSA GCHQ etc.

Version 1.08 has the ability to select the Caesar Shift, defaults to 13 (ROT 13) on load.
This app does Not interfere with your Network billing I have no influence on your billing in any way,
so your Messages are sent at your normal charge rate unless this copy has been hacked of course.
Did you download this app from a reputable site ?

The method of operation is largely self explanatory.

Enter SMS message to be 'encrypted',
Select recipient's Mobile number using the select phone no Button.
Select the Ceasar Shift, you and the recipient must use the same shift to
be able to read each other's messages.
Press Scramble, this will scramble up your message.
Then press send SMS.

All being well, your scrambled message should end up with your intended recipient.
All messages sent are prefixed with /%*1 so that at the receiving end, their App can
tell that a scrambled message has been received and will display it.

PS Your recipient must also be running this app and have the same Caesar shift selected.,

When your recipient replies, his message too will be prefixed by /*%1 and be displayed
in the Scrambled SMS box, press unscramble to decode his or her message.
In this way, you and they can have two way scrambled SMS messaging.

This version works with standard Characters, letters numbers etc and some
punctuation characters, try to keep your messages standard just plain alphabet a-z 0-9.

Problems may arise if you utilize a character which the recipient's phone does not have installed.

Background image by Freepik.com
Buttons by prodraw.net
Icon by Findicons.com

In order to operate, this App requires access to your phone state and contacts.
This app does NOT use these facilities in a way which would violate your privacy,
no private (or any other details) are used in ways which violate your privacy.
I believe this app conforms to Googles Privacy requirements as stipulated here ...

https://play.google.com/about/privacy-security/user-data/

Polite Feedback and feature requests are welcome (be gentle with me :)

New features

Fixed bug creating wrong shift
Rewrote and Simplified internal code
Added Spinner populated with 'Caesar'

App Permissions

Allows applications to call into AccountAuthenticators.
Allows an application to send SMS messages.
Allows applications to open network sockets.
Allows applications to access information about Wi-Fi networks.
Allows an application to receive SMS messages.
Allows an application to read the user's contacts data.
Allows access to the list of accounts in the Accounts Service.
Allows applications to access information about networks.
Allows an application to write to external storage.
Allows read only access to phone state, including the phone number of the device, current cellular network information, the status of any ongoing calls, and a list of any PhoneAccounts registered on the device.
Allows an application to read from external storage.
Allows an application to read the user's call log.