What determines the passphrase of a zero knowledge encryption key pair in a cluster?

• A. The last VA's configuration
• B. Passphrase in the cluster configuration file
• C. Passphrase in the config.yaml of the first VA
• D. The system's default configuration

Answer: (C)

The passphrase of a zero-knowledge encryption key pair in a cluster is determined by the passphrase specified in the config.yaml file of the first Virtual Appliance (VA). This is crucial because the config.yaml file acts as a configuration hub where essential parameters are defined for the initial setup of the cluster. When the first VA is configured, it establishes foundational settings that other VAs in the cluster will utilize, including the encryption mechanisms.

Since zero-knowledge encryption relies on a defined passphrase to generate and manage keys without storing any knowledge of the keys themselves, the integrity and consistency of the encryption are anchored in the setup of the first VA. Subsequent VAs will rely on this passphrase for accessing shared encrypted data and maintaining secure communication within the cluster, ensuring that they function harmoniously with the preset security configurations initiated by the first VA.