Software security: the basics every project needs

Security is often a 'we'll look at it later' topic — until an incident happens. In fact, security is part of the decisions to make at the start of a project; patching it afterward is both hard and expensive.

Identity and authorization

Clearly separate who users are (authentication) and what they can do (authorization). Passwords are never stored in plain text; sessions are managed securely; each user can access only their own data. Role-based access prevents permission chaos.

Never trust input

• Validate and sanitize every input — most SQL injection and XSS come from here.
• Use parameterized queries; never embed user data into a query.
• Use rate limiting to block brute force and abuse.
• Don't leak errors to the user; log internally, show a generic message externally.

Defense in depth

Don't rely on a single measure. Security headers (HTTPS, secure cookies), data encryption, regular backups and keeping dependencies up to date all work together. Even if one layer is breached, the others hold.

Security is not a feature but a habit: the sum of small correct decisions made on every line of code.

At Kerte we build your projects secure from the start with basics like role-based access, secure session management, parameterized queries and regular backups — and keep them updated and protected after delivery.