How to Secure Applications During Modernization on AWS

Cloud environments are very dynamic and interconnected. A single misconfiguration or exposed API key can lead to:  

• Data breaches 

• Compliance violations 

• Costly downtime 

Attackers often target application-level weaknesses, not just infrastructure gaps. If any application handles sensitive data, financial transactions, or user credentials, security is critical. 

Common Mistakes Made When Building Applications

• Hardcoding API keys and credentials 

• Ignoring dependency vulnerabilities 

• Skipping encryption/decryption for sensitive data 

Essential Security Best Practices

1. Identity and Access Management (IAM)

• Create dedicated IAM roles for your Lambda functions, EC2 instances, or ECS tasks instead of hardcoding access keys in your application. 

• We must regularly review who has permissions using the IAM Access Analyzer. 

• We must avoid using the root account for day-to-day operations/ any operations as a developer. 

2. Don’t Store/Share Secrets in Your Code

Your appsettings.json is not the right place for secret keys. Storing API keys or database passwords ...