MLBEDSW-2232: Update Readme with security info

 - Create new SECURITY.md

Signed-off-by: Tim Hall <tim.hall@arm.com>
Change-Id: Ia2885300e488355057b3bbcd8eb6873d82599708
diff --git a/SECURITY.md b/SECURITY.md
new file mode 100644
index 0000000..0a63463
--- /dev/null
+++ b/SECURITY.md
@@ -0,0 +1,7 @@
+# Vela Security
+
+If you believe you have identified a security related issue or vulnerability, then we encourage you to responsibly disclose it to us as soon as possible.
+
+## Reporting Security Issues and Vulnerabilities
+
+Please send an email to <MLG-Security@arm.com> with the subject `Vela Security`.  In the body of the email include as much information as possible about the issue or vulnerability and any additional contact details.
diff --git a/ethos-u-vela/SECURITY.md b/ethos-u-vela/SECURITY.md
new file mode 100644
index 0000000..0a63463
--- /dev/null
+++ b/ethos-u-vela/SECURITY.md
@@ -0,0 +1,7 @@
+# Vela Security
+
+If you believe you have identified a security related issue or vulnerability, then we encourage you to responsibly disclose it to us as soon as possible.
+
+## Reporting Security Issues and Vulnerabilities
+
+Please send an email to <MLG-Security@arm.com> with the subject `Vela Security`.  In the body of the email include as much information as possible about the issue or vulnerability and any additional contact details.