Encrypted Audio Broadcast Pairing Without Manual Password Entry

The patent applies preliminary action by pre-sharing passwords between the electronic device and authorized sink devices before audio transmission. The electronic device stores passwords for multiple sink devices in advance, and during transmission, it automatically selects and uses the appropriate password without requiring manual user input. This resolves the contradiction by maintaining security through pre-established authentication while eliminating the operational burden of manual password entry during each transmission session.

The patent applies self-service by implementing automatic password selection and encryption management within the electronic device. The processor automatically selects the appropriate password from stored credentials based on the target sink device, and the encryption/decryption processes are handled automatically without requiring user intervention or complex manual configuration. This resolves the contradiction by maintaining strong encryption-based security while keeping the device operationally simple through automation of cryptographic functions.