Field notes
Dispatches on encryption, privacy, and operational security — from the team behind Ciphar.

Master secure data exchange principles & best practices. Essential guide for journalists, lawyers, and security pros to protect sensitive information in 2026.
See a real encrypted message example with ciphertext, IV, and auth tag. Learn how AES-256-GCM and zero-knowledge systems work in this practical guide.

Learn how to send anonymous messages safely. This guide covers threat models, secure methods, and the legal risks of false anonymity to protect your identity.

Learn how to mark message as unread on popular apps in 2026. Understand its privacy implications and how it differs in secure chats.

Learn how to leave a note securely using ephemeral, zero-knowledge tools. Our guide covers creating private channels, safe key sharing, and best practices.

Learn the core principles of data protection in the cloud. This guide covers threat models, encryption, and compliance for securing your sensitive data.

Understand zero knowledge encryption, not just the buzzword. Learn how it works in browsers, its real-world limits, and how to use it securely in 2026.

How do i leave a group chat - Learn how to leave a group chat on iMessage, WhatsApp, and more in 2026. Get etiquette tips, message templates, & solutions for

Find the best secure collaboration tools for your team in 2026. Our expert roundup reviews 10 options for privacy, E2EE, and compliance.

Struggling with a 'message send failed' error in Ciphar? Our guide walks through quick checks, key errors, and server issues to get your private chat working.

Learn how to remove group effectively and safely with our comprehensive guide for 2026. Get expert tips and avoid common pitfalls.

Learn how to share files securely with a step-by-step workflow. Covers encryption, transport, key exchange, and tools for journalists, lawyers, and researchers.

Learn how to send a text at a certain time on iPhone, Android, and more. Our 2026 guide covers native tools, apps, and the critical privacy risks to avoid.