sequence! { procedure, context,
    // ACL Connection Established
    Upper Tester -> IUT: SetConnectionEncryption {
        connection_handle: context.peer_handle(),
        encryption_enable: Enable::Enabled
    }
    IUT -> Upper Tester: SetConnectionEncryptionStatus {
       num_hci_command_packets: 1,
       status: ErrorCode::Success,
    }
    IUT -> Lower Tester: EncryptionModeReq {
        transaction_id: 0,
        encryption_mode: 0x01,
    }
    Lower Tester -> IUT: Accepted {
        transaction_id: 0,
        accepted_opcode: Opcode::EncryptionModeReq,
    }
    IUT -> Lower Tester: EncryptionKeySizeReq {
        transaction_id: 0,
        key_size: 0x10,
    }
    Lower Tester -> IUT: Accepted {
        transaction_id: 0,
        accepted_opcode: Opcode::EncryptionKeySizeReq,
    }
    IUT -> Lower Tester: StartEncryptionReq {
        transaction_id: 0,
        random_number: [0; 16],
    }
    Lower Tester -> IUT: Accepted {
        transaction_id: 0,
        accepted_opcode: Opcode::StartEncryptionReq,
    }
    IUT -> Upper Tester: EncryptionChange {
        status: ErrorCode::Success,
        connection_handle: context.peer_handle(),
        encryption_enabled: EncryptionEnabled::On,
    }
}