A way of encryptingEncryption refers to encoding and decoding (or encrypting and decrypting) data so that it can't be read unless you have the right key. It's critical for good security. data that uses the same keyA number used to encrypt (or encode) information so that no one can read it. Keys are used when encoding and decoding. You shouldn't have to mess with keys yourself. both for encrypting and decrypting.
Inside the Internet of Things - Bryon Moyer Blog