Guides
Practical, sourced explanations of how these tools work and how to use them well. Written for non-experts, detailed enough for experts.
How Browser-Based File Encryption Works
A plain-language walkthrough of what actually happens when you encrypt a file in your browser: key derivation, AES-256-GCM, chunked encryption, and why nothing is uploaded.
Updated 2026-07-14
Encryption vs. Password Protection: They Are Not the Same Thing
Many tools that ask for a password do not actually encrypt your data. Learn how to tell real encryption apart from access-control features that only look secure.
Updated 2026-07-14
How to Choose a Strong Encryption Password
Encryption passwords face offline guessing attacks, which makes them different from account passwords. Here is how to pick one that holds up.
Updated 2026-07-14
What Happens When an Encryption Password Is Lost
Why properly encrypted data cannot be reset or recovered without the password or recovery key, what you can realistically try, and how to prevent the situation.
Updated 2026-07-14
How to Send Passwords Securely
Email and chat keep copies of everything. Learn safer ways to hand someone a password, including one-time secret links and split-channel delivery.
Updated 2026-07-14
Why One-Time Links Can Be Opened by Security Scanners
Corporate email filters and chat apps often visit links before you do. Here is why that can consume a one-time secret link, and how to share secrets anyway.
Updated 2026-07-14
How to Remove Location Data From Photos
Smartphone photos usually embed precise GPS coordinates. Learn where that data lives, when it matters, and how to strip it before sharing.
Updated 2026-07-14
How to Redact a PDF Properly
Drawing a black box over text does not remove it. Learn why so many redactions fail and how flatten-to-pixels redaction actually destroys the hidden data.
Updated 2026-07-14
Blur vs. Redaction: Why Blurring Is Not Safe for Sensitive Data
Blurred and pixelated text can often be reconstructed. Understand why obfuscation is reversible, and when only true redaction will do.
Updated 2026-07-14
How to Check a Downloaded File's SHA-256 Hash
A step-by-step guide to verifying file integrity with SHA-256, what a matching hash proves, and what it does not.
Updated 2026-07-14
What File Metadata Reveals About You
Documents, spreadsheets, and images carry hidden information: names, locations, edit histories, and device details. Here is what travels with your files.
Updated 2026-07-14
How to Safely Share Tax Documents
Tax returns concentrate more sensitive data than almost any other file you handle. A practical workflow for sending them to accountants, lenders, and agencies.
Updated 2026-07-14
How to Create an Encrypted Backup
A backup you cannot trust with your secrets is a backup you will hesitate to make. How to build encrypted backups that survive both disk failure and prying eyes.
Updated 2026-07-14
What 'Zero-Knowledge' Means (and What It Does Not)
Zero-knowledge is one of the most used and misused terms in privacy tools. What the architecture actually guarantees, and the trust you still extend.
Updated 2026-07-14
Hosted Encryption Tools vs. Offline Encryption Apps
Browser-based tools, hosted services, and installed applications each place trust differently. How to choose the right kind of encryption tool for your situation.
Updated 2026-07-14
How to Verify Software Download Checksums
A downloaded installer can be corrupted or swapped without you noticing. Learn what a checksum actually proves, how to compute one in your browser, and where the limits are.
Updated 2026-07-14
How Strong Are Six-Word Passphrases?
Six random words feel too simple to be secure. The math says otherwise: what 77 bits of entropy actually means, and why randomness matters more than complexity.
Updated 2026-07-14
How to Safely Back Up Two-Factor Recovery Codes
Recovery codes are the keys you use when everything else fails. Where to keep them so a lost phone does not become a lost account, without leaving them exposed in plaintext.
Updated 2026-07-14
What a Browser Encryption Tool Can and Cannot Protect Against
An honest map of the trust boundary: the threats local browser-based encryption genuinely defends against, the ones it cannot, and how to tell which side of the line you are on.
Updated 2026-07-14
How SecretPNG Handles Advertising and Secure Workspaces
SecretPNG is free and ad-supported, which raises a fair question: how do ads coexist with a privacy tool? The answer is strict separation, and you can verify it yourself.
Updated 2026-07-14