Send Encrypted SMS with ProSMS
ProSMS is application for encrypting SMS messages. Encryption algorithm is AES-256 and hash function for generating keys from passwords is SHA-256. This is end-to-end encryption, meaning that Mobile providers can’t read your messages. It can only be read by the recipient who has the right password.
Note: Encryption will work only if both sides install ProSMS.
http://www.getjar.com/mobile/30522/prosms/
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