In this article we will teach you a very simple and highly effective technique to encrypt your messages manually before saving them in TestaDigi.
The most important step: The physical key at home
The Golden Rule: Write the decryption instructions (the "key") on a physical paper and keep it in a safe place in your home (inside a book, for example).
Examples: Caesar Cipher and Substitution
You can use simple rules like shifting each letter 3 positions or typing the adjacent key on the keyboard. This way you guarantee absolute security.