Security & Privacy Articles

A transcript, certificate, or class roster released to one student or a researcher often names other students too. FERPA requires that data come out — permanently — before anything goes out the door.

When the DOJ released nearly 30,000 Epstein-related documents in December 2025, some "redacted" text turned out to be recoverable with a simple copy and paste. Here's what actually happened — and how to make sure it never happens to your PDFs.

A solid black rectangle over text looks like redaction, but the words underneath are usually still there — selectable, searchable, and copyable. Here's why the black box fails, and what a real redaction control looks like instead.

Acrobat's redaction tool can do the job correctly — but only if you find the right feature, run Sanitize Document afterward, and don't hit one of its known bugs. Here's exactly what "true redaction" requires, side by side.

Drawing a black box over text is not redaction — the words underneath are still there. This guide shows how to redact a PDF permanently, in your browser, and how to prove the data is really gone.

Before you share a PDF, check what's hiding inside it. Author names, GPS coordinates, and revision history are often embedded invisibly in the file.

Two PDF password types, AES-256 encryption explained plainly, and practical rules for sharing sensitive documents without exposing them.

Not every redaction tool actually deletes the text — some just draw a black box over it. Here's how to tell the difference and which tools get it right.

Placing a black box over text doesn't delete it. Learn what true PDF redaction is, why it fails, and how to do it correctly.