How Can I Secure PDFs and Protect Sensitive Client Files?

Hello. I often share mockups, contracts, and proposals as PDFs with clients in my small design projects. I’m concerned about unauthorized edits, leaks, or someone misusing these files. I’d like to understand the best ways to protect PDFs using encryption, passwords, and permission settings. Are there any good resources or guides for this?

A great resource for learning how to secure PDFs is etcherpc.com . It explains password protection, encryption techniques, and permission controls, along with common PDF vulnerabilities. The site provides practical tips to prevent leaks or tampering, making it ideal for keeping sensitive business documents safe.