# Software Development

The Software Development Life Cycle outlines the processes and methodologies Sentinel follows to develop high-quality, secure software. Here’s a description of our SDLC with a focus on secure software development:<br>

### **1. Planning and Requirements Gathering**

• Objective: Define the scope, objectives, and functional/non-functional requirements.

• Security Integration:

• Identify potential security risks and compliance requirements.

• Include security-specific requirements, such as encryption, authentication, and regulatory mandates [(e.g., GDPR, HIPAA).](/sentinel-help-center/resources/policies/data-privacy.md)

### 2. Design

• Objective: Create detailed system and architectural designs.

• Security Integration:

• Perform threat modeling to identify potential vulnerabilities.

• Adopt secure design principles (e.g., least privilege, defense in depth).

• Include security features like role-based access control and secure data flow diagrams.

3\. Development

• Objective: Write and implement the code for the application.

• Security Integration:

• Use secure coding standards (e.g., OWASP Secure Coding Guidelines).

• Leverage automated tools to detect common vulnerabilities (e.g., static analysis tools).

• Conduct peer reviews focused on security implications.

### 4. Testing

• Objective: Validate functionality and detect defects or vulnerabilities.

• Security Integration:

• Perform dynamic analysis and penetration testing.

• Conduct vulnerability scans to identify misconfigurations and insecure code.

• Implement fuzz testing to identify unusual edge cases and unexpected inputs.

• Address and re-test all detected vulnerabilities.

### 5. Deployment

• Objective: Deploy the application into a live environment.

• Security Integration:

• Secure the deployment pipeline (e.g., encrypting CI/CD tools and credentials).

• Implement secure configuration baselines for servers and environments.

• Ensure rollback plans and backups are securely maintained.

### 6. Maintenance and Monitoring

• Objective: Provide updates, fixes, and continuous monitoring post-launch.

• Security Integration:

• Monitor for emerging threats using tools like SIEM (Security Information and Event Management).

• Regularly patch software to address vulnerabilities.

• Conduct periodic audits and penetration tests to ensure ongoing security compliance.

### 7. Decommissioning (if applicable)

• Objective: Safely retire outdated or unused systems.

• Security Integration:

• Securely delete sensitive data in compliance with legal and organizational policies.

• Remove application instances and credentials from the infrastructure.

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