Resting end-to-end encrypted data means that the data at rest, such as stored on a device or server, remains encrypted and cannot be accessed without the appropriate decryption keys. End-to-end encryption (E2EE) provides a high level of security, ensuring that only the sender and intended recipient can access the content of the message or data, rather than any third-party or intermediary having access to the unencrypted data. This is especially important for sensitive information and communications, such as financial or medical records. E2EE also helps protect against data breaches and cyber attacks, as even if an attacker were able to access the encrypted data, they would be unable to read or use the information without the proper decryption keys.