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PBKDF2: The Million-Iteration Stretch — why every password hash runs itself a million times before it ever stores you
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Why Every Password Hash Runs Itself a Million Times Before It Ever Stores You

Posted by By xiezixing 2026年6月11日
In the end, the password you typed in is not what gets stored. What gets…
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US SSN Validator — three forbidden numbers hidden in every Social Security Number: 078-05-1120 wallet card, area 666, ITIN range
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Why Every US Social Security Number Has Three Forbidden Numbers Hidden Inside

Posted by By xiezixing 2026年6月8日
Why This Matters A friend in HR once asked me, "We just plugged in ^d{3}-?d{2}-?d{4}$.…
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Why every national ID has a hidden self-checking code you never see
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Why Every National ID Number Has a Hidden Self-Checking Code You Never See

Posted by By xiezixing 2026年6月8日
What an ID is really for Somewhere in the back of a Chinese government building…
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XSS Payload Detector: eight characters that run code in your browser — a modern detector handles 10 attack categories, 4 risk levels, and encoding tricks
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Why Every Text Field on the Web Is Quietly Waiting for the Wrong Eight Characters

Posted by By xiezixing 2026年6月8日
The cleanest way to think about XSS is to remember one thing: every web form…
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Title poster: APOSTROPHE — One quote can wipe your database. The 27-year-old SQL injection threat still breaking the web.
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Why One Apostrophe Can Wipe Out Your Entire Database

Posted by By xiezixing 2026年6月7日
A junior developer pastes a login form into production. A user types ' OR '1'='1…
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ReDoS regex denial of service: the 14-character bug, one regex pattern, days of downtime
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One Regex Pattern, 4 Days of Downtime

Posted by By xiezixing 2026年6月5日
The regex engine does not warn you. It accepts the pattern, returns true or false,…
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7 Free File Integrity & Security Tools Every Developer Needs
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7 Free File Integrity & Security Tools Every Developer Needs

Posted by By xiezixing 2026年4月25日
7 Free File Integrity & Security Tools Every Developer Needs Downloading a file from the…
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5 Free Tools to Find SQL Injection and XSS Before Hackers Do
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5 Free Tools to Find SQL Injection and XSS Before Hackers Do

Posted by By xiezixing 2026年4月21日
# 5 Free Tools to Find SQL Injection and XSS Before Hackers Do A hacker…
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5 Free Tools to Find SQL Injection and XSS Before Hackers Do
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5 Free Tools to Find SQL Injection and XSS Before Hackers Do

Posted by By xiezixing 2026年4月19日
5 Free Tools to Find SQL Injection and XSS Before Hackers Do A hacker once…
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Your UUIDs Are Lying to You

Posted by By xiezixing 2026年4月18日
Your UUIDs Are Lying to You Every UUID is a data leak waiting to happen.…
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