Category
Security & Privacy
Encryption, redaction, GDPR/HIPAA, and protecting sensitive documents.
34 posts
Europe Is About to Miss Its Digital Identity Wallet Deadline
All 27 EU member states are legally required to offer their citizens a digital identity wallet by 24 December 2026. With four months left, fewer than half are…
Malicious PDFs and How to Stay Safe
PDF is a container format with an execution model, an embedded-file mechanism, a scripting engine and a network-capable link system. That combination is…
PDF JavaScript: What It Does and What It Risks
PDFs can run code. Not the JavaScript of a web page — a separate, older dialect with a document-oriented API — but code nonetheless, executing when a document…
Sending Documents Securely by Email
Email was designed in the 1980s to move plain text between trusted machines, and every security property it now has was bolted on later. Most of the time that…
How to Verify a Digital Signature in a PDF
Someone sends you a signed PDF. Your viewer shows a green tick, or a yellow warning triangle, or nothing at all. Working out what those actually mean — and…
Long-Term Validation and PDF Timestamps
A digital signature that verifies perfectly today can become unverifiable in three years, without anybody touching the document. The certificate expires, the…
How to Add Initials to a PDF Online
Create drawn, typed, or uploaded initials and place them on the required PDF pages without installing desktop software.
How to Compress a Password-Protected PDF Safely
Understand why encrypted PDFs cannot be compressed directly, how to make an authorized working copy, and why compression can affect digital signatures.
How to Create a Transparent Signature for a PDF
Create a signature without a white background by drawing or typing it in Docento, or prepare a transparent PNG before uploading.
Digital Signature Internals in PDF
A digital signature on a PDF is more than a scribbled image. It's a cryptographic operation that proves who signed, when, and that the document hasn't been…
Certified PDFs Explained: Document-Level Signatures and What They Allow
A regular signed PDF carries a signature on a specific form field. A certified PDF is signed at the document level, one signature that covers the entire file…
PDFs and Zero Trust Document Security
Zero Trust is the security model that replaced the old perimeter-based approach. Instead of "trust everything inside the network, distrust everything outside"…
How to Detect Tampered PDFs: Signs, Tools, and Forensics
A PDF that has been altered after being shared, signed, or archived can have legal, financial, or operational consequences. Detecting tampering is sometimes…
PDF Permissions Explained: Print, Copy, Edit, and Why They Are Advisory
When you encrypt a PDF, your tool usually offers checkboxes: allow printing? allow copying? allow form filling? allow modifications? These are PDF permissions…
Hidden Data in PDFs: What Lurks Inside and Why It Matters
A PDF on screen looks like a clean rendering of pages. The actual file is a complex container holding text, images, fonts, structure trees, metadata…
How to Anonymize PDF Documents Properly
Anonymizing a PDF means removing every piece of information that could identify an individual or organization. It is what you do before publishing a case…
GDPR and PDF Documents: What Compliance Actually Looks Like
The General Data Protection Regulation (GDPR) governs how organizations handle personal data of EU residents. Almost every business operating in or selling to…
HIPAA-Compliant PDF Handling for Healthcare Documents
If your organization touches protected health information (PHI) in the United States, the Health Insurance Portability and Accountability Act (HIPAA) governs…
AES-128 vs AES-256 for PDF Encryption: What the Difference Actually Means
When you encrypt a PDF, your tool usually offers a choice between AES-128 and AES-256. Pick the bigger number and move on, right? Mostly yes, but the choice…
PDF Redaction Failures: Real Cases and How to Avoid Them
Every few years, a high-profile organization releases a redacted PDF, and within hours someone discovers the redactions can be defeated by selecting the text…
How to Add a Signature Field to a PDF Form
A signature field is a specific PDF form field designed to capture a signature, either an electronic signature drawn or typed in the moment, or a digital…
How to Create an Electronic Signature in 5 Minutes
Creating an electronic signature is one of those small adult skills nobody teaches but everybody needs. The first time someone asks you to "sign and return" a…
How to Edit PDF Metadata: Author, Title, Keywords, and Beyond
Every PDF carries metadata, information about the file rather than its visible content. Title, author, subject, keywords, creation and modification dates, the…
E-Signature Laws Around the World: A 2026 Overview
Electronic signatures are now legal in most jurisdictions, but "legal" means different things in different places. Knowing what kind of e-signature is required…
How to Strip Metadata From a PDF for Privacy
Every PDF you create silently records information about you, your software, and your workflow. Most of it is harmless. Some of it is embarrassing. A bit of it…
PDF Encryption Explained: AES, Passwords, and Permissions
PDF encryption is one of those features everyone uses occasionally but few understand well. The result is files that feel secure but aren't, or files that are…
Digital Signatures vs Electronic Signatures: What Is the Difference?
The two terms get used interchangeably and mean genuinely different things. The confusion is harmless right up until the moment a counterparty says "we need a…
How to Share a PDF Securely
Most document leaks are not sophisticated. They are a file sent to the wrong address, a link forwarded to someone it was never meant for, an attachment sitting…
How to Remove a Password from a PDF
Your bank sends statements encrypted with your date of birth. A client sends a locked contract you need to annotate. Your own archive from three years ago is…
How to Redact Text in a PDF Securely
Redaction failures are among the most reliably embarrassing mistakes in professional document handling, and they keep happening to organisations that should…
How to Password Protect a PDF for Free
PDF encryption is genuinely strong — modern files use AES-128 or AES-256, and there is no back door. But whether it protects anything depends almost entirely…
Is It Legal to Sign Documents Electronically?
For the great majority of everyday agreements, yes — and it has been for over two decades. Electronic signatures are recognised in law across most of the…
Why Your Privacy Matters: The Security of In-Browser PDF Editing
Think about the last five PDFs you edited. There is a good chance the list includes something you would not post publicly: a signed contract, a payslip, a…
How to Sign a PDF Online Without Downloading Software
You have been sent a contract, an offer letter, a rental agreement, or a permission slip, and it needs your signature back today. You do not have a printer…