SaaS Application Security: A 10-Point Checklist
Some of the most sensitive data in the world flows through cloud applications every day, which makes SaaS application security a board-level concern, not an IT footnote. The work is more checklist than mystery. Here are ten requirements to assess against, from encryption protocols to vendor-continuity planning.
The short version. Secure a SaaS application across ten fronts: encryption, authentication, secure development, backup and recovery, third-party risk, escrow for continuity, vulnerability management, monitoring and incident response, privacy and compliance, and security awareness. The first nine reduce the chance of an incident; escrow covers what happens if the vendor itself fails.
- Encrypt in transit and at rest. Use industry-standard protocols (TLS 1.2+ in transit, AES-256 at rest), and manage and rotate keys. Encryption blocks man-in-the-middle attacks and renders stolen storage unreadable.
- Authenticate strongly. Enforce MFA and strong password policy, use SSO and federated identity where it fits, and apply least-privilege, role-based access.
- Follow secure development practices. Confirm the provider codes against the OWASP Top 10, runs code reviews and audits, and includes SAST/DAST in CI/CD.
- Back up and plan recovery. Ensure frequent automatic backups, test restoration periodically, and confirm backups are encrypted and stored separately.
- Manage third-party risk. SaaS vendors lean on cloud providers, CDNs, payment processors, and APIs. Vet them, review their certifications, and set security SLAs in contracts.
- Protect continuity with escrow. Your continuity is tied to the vendor's. A SaaS escrow agreement gives you access to source code, data, and deployment tools if the vendor fails to deliver, and a reputable agent keeps the deposit verified and current.
- Manage vulnerabilities and patch. Track CVE feeds for your stack, scan regularly, and apply patches promptly with rollback plans.
- Log, monitor, and respond. Centralized logging and real-time monitoring catch unusual activity early; integrate with SIEM and test a SaaS-specific incident response plan.
- Control privacy and compliance. Define data ownership, retention, and deletion, and meet CCPA, HIPAA, and GDPR where they apply.
- Train people. Human error drives a large share of breaches, so run regular training on phishing and credential hygiene, and require it for admins and developers.
The step most teams miss
Nine of these ten are about preventing or detecting an incident. The tenth, escrow, is about surviving the one you cannot prevent: the vendor going dark. When you depend on a hosted application, the provider's viability is part of your security posture, and SaaS escrow is what keeps a vendor failure from becoming your outage. Choose an agent that verifies deposits so the materials would actually run, see it from the vendor's side, and check provider certifications.
Frequently asked questions
What is SaaS application security?
The practices and controls that protect a cloud application and its data, spanning encryption, authentication, secure development, backups, third-party risk, vulnerability management, monitoring, privacy compliance, training, and continuity planning.
What should a SaaS security checklist include?
Encryption in transit and at rest, strong authentication and access control, secure development, backup and recovery, third-party risk management, escrow for continuity, patching, monitoring and incident response, privacy compliance, and security awareness training.
What encryption standards should a SaaS app use?
Industry-standard protocols such as TLS 1.2 or higher for data in transit and AES-256 for data at rest, with encryption keys securely managed and rotated regularly.
Why include escrow in SaaS security?
Because your continuity depends on the vendor's. A SaaS escrow agreement gives you access to the source code, data, and deployment tools needed to keep running if the vendor fails to deliver.
How important is employee training to SaaS security?
Very. Human error causes a large share of breaches, so regular training on phishing and credential management, especially for admins and developers, is a core control, not an optional one.
Close the last gap on your checklist.
See how SaaS escrow covers vendor-continuity risk, the one item the other nine controls cannot.
See how SaaS escrow works → Or talk to our team