"Crypto - RSA encryption" by Cronkhinator is an app for encrypting and decrypting text based messages and images*. It can be used with (or without) RSA encryption. The application supports all international character sets.

RSA system:
- Generate your own private and public key (up to 4096 bit)
- Share your public key with friends
- Manage contacts and save your friends' public keys
- Encrypt your messages/images for exclusively one of your contacts
- Decrypt messages only meant to be for you
- Export your data to a new device

Without RSA system:
- When not choosing a contact encrypt and decrypt messages with a simple text converter on base 36

* Images up to 75kb and only with rsa encryption