E-commerce Security: Protecting Customer Data and Transactions
E-commerce systems handle sensitive customer data (personal information, payment data) and high-value transactions that are attractive targets for cybercriminals. Security failures result in data breaches (with GDPR fines and reputational damage), payment fraud, and loss of customer trust. Security must be designed in, not bolted on.
Key E-commerce Security Requirements
- PCI-DSS compliance: Any merchant that accepts card payments must comply with Payment Card Industry Data Security Standard. Scope varies — SAQ A (redirect checkout) is simplest; SAQ D (own card storage) most demanding. Hosted payment pages and tokenisation minimise PCI scope.
- SSL/TLS: HTTPS across the entire site — not just checkout. Free certificates via Let's Encrypt; no excuse for HTTP anywhere.
- Web Application Firewall (WAF): Protect against OWASP Top 10 vulnerabilities — SQL injection, XSS, CSRF. Cloudflare, AWS WAF, ModSecurity.
- Dependency security: E-commerce platforms have large open source dependency trees. SCA scanning (Snyk, OWASP Dependency-Check) for known CVEs.
Magecart Attacks
Magecart is a category of JavaScript skimming attacks that inject malicious code into checkout pages to steal card data as it's entered. Major breaches (British Airways, Ticketmaster) involved Magecart. Prevention: Content Security Policy headers limiting script execution, subresource integrity checking, regular script audit, third-party script management.