How to Sign Word Documents with Post-Quantum ML-DSA Certificates in Python
A contract signed today may need to be defensible in twenty years, and RSA-2048 is not expected to last that long. This guide signs a Word document with post-quantum ML-DSA certificates from Python in four steps, compares the three NIST security levels on measured file sizes rather than description, verifies the result against a public certificate, and covers the two limits worth knowing before you migrate.
Signing PDFs from Python: Three Controls That Decide Whether Your Signature Holds Up
A PDF signed with an expired certificate looks signed and validates as broken. This guide compares the three controls GroupDocs.Signature for Python gives you over that outcome - the digest written into the signature, the validity check and its two deliberate overrides, and the log level that decides whether anyone finds out - with runnable code for each and a note on the two binding details that trip people up.
Your Python Service Used to Fetch Whatever a Document Told It To
A linked picture lets whoever sends you a document choose which URLs your server requests. GroupDocs.Signature 26.9 flips the default so those addresses are skipped, and this article shows the difference in three measured preview sizes, explains why the whitelist needs long fragments, and covers the one property name that silently inverts your intent.
GroupDocs.Signature for Python 26.10 – October 2026 Release Highlights
The 26.10 release introduces Python callbacks for preview, logger/encryption interfaces, custom sign hash, .NET 10 runtime, and Python 3.14 compatibility.
GroupDocs.Viewer for .NET 26.9 – September 2026 Release Highlights
GroupDocs.Viewer for .NET 26.9 introduces one performance enhancement and plenty of fixed bugs.
How to Redact Text in a PDF on Linux with Docker
Learn how to redact text in a PDF on Linux with Docker using GroupDocs.Redaction for .NET 26.9 and .NET 10. The sample uses ExactPhraseRedaction to cover a phrase with a black box and shows how to run it from Visual Studio or the Docker command line.
Post-Quantum Signing Arrives Quietly: ML-DSA for Word Documents in .NET
Post-quantum cryptography usually arrives as a migration project. For document signing in .NET it arrives as a different PFX file: GroupDocs.Signature 26.9 signs Word documents with ML-DSA certificates through the same DigitalSignOptions call used for RSA. This article contrasts the expected effort with the actual one, covers the three security levels and their cost, and is honest about the two limits.
Three Ways to Load a Document, Only One of Them Safe
A document that links to a remote picture asks whoever opens it to fetch that address. On a server, that hands an uploader control over your outbound requests. GroupDocs.Signature 26.9 changes the default so linked resources are skipped; this article compares the three load modes, shows how to whitelist one host without opening the door, and explains why signing needs no network access at all.
Your Signing Pipeline Just Got Stricter: Certificate Validity in GroupDocs.Signature 26.9
Three changes in GroupDocs.Signature 26.9 turn silent problems into loud ones: an expired certificate now throws instead of signing, PDF digital signatures default to SHA-256 instead of SHA-1, and SignatureSettings.LogLevel actually filters. This article covers what each change means for a pipeline that has been running for years, and what to do about the cases where you genuinely need the old behaviour.
GroupDocs.Redaction for .NET 26.9 – September 2026 Release Notes
GroupDocs.Redaction for .NET 26.9 completes the move away from System.Drawing and improves cross-platform support for Linux and other supported operating systems.
