In brief, encryption works by:
1.Starting with plain data
2.Applying a key (secret code) to transform the data
3.Ending with encrypted data
The encrypted data is only readable by someone with the original key used to encrypt the data.Modern encryption algorithms work on this principle, with the second step being very complex and worthy of doctoral- level research. What you need to look for is your data being encrypted with the AES algorithm of at least 128 bits. Many of the top VPNs out there go a step above that and offer AES-256 encryption, and Buffered. If you’re interested, you can learn more about AES encryption.
Your VPN can be super secure, but it all comes down to the connection protocol the encryption mechanism used to handle your information.
The encrypted data is only readable by someone with the original key used to encrypt the data.