In-depth guides, tips, and tutorials on two-factor authentication and online security.
People use the terms interchangeably, but there is a precise relationship worth knowing, plus the encodeURI vs encodeURIComponent trap that breaks real URLs. Here is the clear version.
Read more →That SHA-256 string next to a download isn't decoration. Here is how to check it on Windows, Mac, and Linux, what it proves, and why it matters for security.
Read more →One scan drops your name, phone, email, and website straight into someone's contacts. Here is how vCard QR codes work, how to make one, and how to use them on cards and email signatures.
Read more →Stop reading your WiFi password out letter by letter. A WiFi QR code lets any guest connect with one scan. Here is how to make one, the exact format, and how to do it safely.
Read more →Automation tools expect cookies as JSON objects with specific fields, but browsers export them as flat strings. Here is how to convert between the formats and reuse a logged in session.
Read more →HTTP Basic Auth is just a username, a password, and Base64. Here is how to test it with curl, build the header by hand, debug 401s, and why HTTPS is non-negotiable.
Read more →Every JWT is three Base64 blocks separated by dots, and two of them are readable by anyone. Here is how to decode a token by hand, what lives inside, and the security rules developers forget.
Read more →Those %20 and %3A codes in URLs are hiding readable text. Here is how URL decoding fixes broken links, exposes where tracking links really go, and untangles nested redirects.
Read more →Registering WhatsApp and the SMS never comes? From carrier filtering to the call option to the wait timer trap, here is every fix, plus the security warning about codes that arrive unrequested.
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