Update SECURITY.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: aramb-dev

SECURITY.md

@@ -38,7 +38,13 @@ Instead, please report security issues through one of these methods:
    - Provide detailed information about the vulnerability
 
 2. **Direct Contact**:
-   - Contact the maintainers through the channels listed on the [MTWS GitHub profile](https://github.com/mtwsnc)
+   - Email us at **security@mtws.org** for confidential disclosures.
+   - For encrypted communication, use our PGP key:
+     ```
+     -----BEGIN PGP PUBLIC KEY BLOCK-----
+     [Insert PGP public key here]
+     -----END PGP PUBLIC KEY BLOCK-----
+     ```
    - Include "SECURITY" in the subject line
 
 ### What to Include