Create SECURITY.md (#17)

Co-authored-by: Sachin Punadikar <sachin.punadikar@seagate.com>

SECURITY.md

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+# CORTX Security Policy
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+We take the security of the CORTX project seriously. If you find any security vulnerabilities in any of the CORTX-owned source code managed via our [GitHub Organisation](https://github.com/Seagate) repositories, please report it to us as described below.
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+## Reporting Security Issues
+
+:warning: **Please do not publicly report any security vulnerabilities via GitHub issues.**
+
+Instead, please report them to us by mailing us at [cortx-questions@seagate.com](mailto:cortx-questionse@seagate.com). 
+
+#### Reporting Format
+
+To make your reporting meaningful and help us understand the nature and scope of the issue, please include as much information as possible. 
+
+#### Preferred Languages
+
+We prefer all communications to be in English.