add link to security workshop

Author: angelarw

README.md

@@ -13,3 +13,7 @@ This repository contains a collection of workshops and other hands on content th
 - [**Image Processing**](ImageProcessing) - This module shows you how to build a serverless image processing application using workflow orchestration in the backend. You'll learn the basics of using AWS Step Functions to orchestrate multiple AWS Lambda functions while leveraging the deep learning-based facial recognition features of Amazon Rekogntion.
 
 - [**Multi Region**](MultiRegion) - This workshop shows you how to build a serverless ticketing system that is replicated across two regions and provides automatic failover in the event of a disaster. You will learn the basics of deploying AWS Lambda functions, exposing them via API Gateway, and configuring replication using Route53 and DynamoDB streams.
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+- [**Security**](https://github.com/aws-samples/aws-serverless-security-workshop) - This workshop shows you techniques to secure a serverless application built with AWS Lambda, Amazon API Gateway and RDS Aurora. We will cover AWS services and features you can leverage to improve the security of a serverless applications in 5 domains: identity & access management, infrastructure, data, code, and logging & monitoring. 
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