You can't trust other SMS backup programs with Internet access, right? You don't know where they are uploading your private SMS conversations. All of the SMS backup programs on the play store require Internet access. This one doesn't.
If you care about your privacy, this program is what you need. Source code is available on: https://github.com/aladagemre/EncryptedSMSBackup
We just read SMS and save them as encrypted TXT files on your phone memory, we DO NOT SEND them anywhere. You can manually move the backup files to your PC/anywhere you want and decrypt there.
- Writing each conversation to a different TXT file.
- Encryption (optional)
- Zipping all conversations (optional)
Example in the file manager:
[2013-10-02 13:49] John: Hey how are you?
[2013-10-02 13:50] Me: Fine, and you?
[2013-10-02 13:51] John: Excellent!
If you encrypt your SMS files, you can decrypt them with SMS-decrypter, a desktop GUI: https://github.com/aladagemre/sms-decrypter/releases