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103 Articles
Security & Privacy
Articles filed under Security & Privacy.
Showing 85–103 of 103 articles
🔑 Security & Privacy
How to See the ed25519 SSH Key Format Before Generating One
See exactly what an ed25519 SSH public key file looks like, then get the terminal command to generate a real, usable key pair, without touching a private key.
🔒 Security & Privacy
How to Spot a Phishing Link Before You Click It
Check a URL against seven common phishing red flags — @ tricks, IP hosts, brand lookalikes, and more — entirely offline, before you click something suspicious.
🕵️ Security & Privacy
How to Spot a Punycode Phishing Domain
Analyze a domain for mixed-script homoglyph tricks and reveal its punycode form to spot potential phishing links before you click them.
📧 Security & Privacy
How to Trace an Email's Origin From Its Headers
Paste raw email headers to see a clean summary of sender, subject, authentication results, and every delivery hop in order, without parsing raw text by eye.
🔒 Security & Privacy
How to use Argon2 Hash Tool for a real task
Use a argon2 hash tool to handle the details clearly, check your result before sharing it, and finish the task privately in your browser with Argon2 Hash.
🔒 Security & Privacy
How to use Have I Been Pwned Checker for a real task
Use a have i been pwned checker to handle the details clearly, check your result before sharing it, and finish the task privately in your browser with Have I.
🔒 Security & Privacy
How to use Security.txt Generator for a real task
Use a security.txt generator to handle the details clearly, check your result before sharing it, and finish the task privately in your browser with.
🔒 Security & Privacy
How to use Steganography Tool for a real task
Use a steganography tool to handle the details clearly, check your result before sharing it, and finish the task privately in your browser with Steganography.
🏦 Security & Privacy
How to Catch a Typo in an IBAN Before You Pay
Check whether an IBAN has a valid country-specific length and mod-97 checksum, catching typos before you send an international payment to the wrong place.
🔐 Security & Privacy
How to Build an SSH Config File for Multiple Hosts
Generate a multi-host SSH config file with aliases, hostnames, users, ports, and identity files, so you can type ssh prod instead of a long command every time.
🔒 Security & Privacy
How to Calculate a Password's Entropy in Bits
Calculate a password's entropy in bits and an estimated offline crack time based on its real character set and length, not just a vague colored strength meter.
🔒 Security & Privacy
How to Check if a Credit Card Number Is Valid
Learn how the Luhn algorithm catches mistyped card numbers, why network detection matters, and how to validate a card number without sending it anywhere.
🔒 Security & Privacy
How to Encrypt and Decrypt Text With a Vigenère Cipher
Learn how the Vigenère cipher's keyword-based shifting works and how to encrypt or decrypt text with it for classes, puzzles, or classic cryptography practice.
🔒 Security & Privacy
How to Generate an RSA Key Pair in Your Browser
Generate a 2048 to 4096-bit RSA public/private key pair in PEM format for signing or encryption, entirely in your browser with the Web Crypto API.
🔒 Security & Privacy
How to Grade Security Headers and Spot the WAF Behind Them
Paste a site's response headers to get a security header grade and identify the WAF or CDN provider protecting it, entirely in your browser.
🔒 Security & Privacy
Is WebRTC Leaking Your Real IP Behind a VPN?
WebRTC can expose your real local and public IP addresses even while a VPN is active. Here's why it happens and how to test your browser for the leak.
🔒 Security & Privacy
Is Your Password Actually Strong Enough?
Password meters disagree with each other constantly. Here's what actually makes a password hard to crack, and how to check yours without typing it into a random website.
🔒 Security & Privacy
What Do Those HTTP Security Headers Actually Do?
Paste your site's response headers and get plain-language explanations of what each one does, plus which commonly recommended headers might be missing.
🔒 Security & Privacy
What to Do First After a Data Breach: A Checklist
A five-phase data breach response checklist — contain, assess, notify, remediate, review — to keep your incident response organized when it matters most.