Secure

1. Free from attack or danger; protected.
2. Free from the danger of theft; safe.
3. Free from the risk of eavesdropping, interception or discovery; secret.
4. Free from anxiety or doubt; unafraid.
5. Firm and not likely to fail; stable.
6. Free from the risk of financial loss; reliable.
7. Confident in opinion; not entertaining, or not having reason to entertain, doubt; certain; sure; commonly used with of.
8. (obsolete) Overconfident; incautious; careless.

insecure