The most secure level of encryption is 256-bit encryption. This type of encryption uses a key that contains 256 0s and 1s, making it extremely difficult for unauthorized users to decrypt the data or gain access to it. It is widely considered the highest level of security available today, as it would take billions of years for a computer to crack the code. This makes 256-bit encryption a popular choice for organizations and individuals who need to protect sensitive data from cyber criminals or malicious actors.