End-to-end encryption uses a combination of symmetric and asymmetric data encryption.
Symmetric encryption means that the same cryptographic key is used for both encryption and decryption. In addition, the algorithms necessary for protection are applied to it, since the key itself, as a rule, is not enough. The data is shuffled in such a way as to ensure maximum security. However, the key can still be guessed, so security professionals change values such as key length, complexity, and number of rounds of conversion.
Asymmetric encryption is the operation when a public and private key is used to protect data. The first is used to encrypt data, and the second is used to decrypt it.