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Security Wiki

Clear definitions of CAPTCHA, bot protection, online fraud, and web security terms from the CaptchaFox team.

What Are Private Access Tokens (PATs)?

Private Access Tokens are cryptographic attestations from a device vendor that vouch for a client's legitimacy, letting some visitors skip CAPTCHAs.

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What Is a Bot?

A bot is a software program that performs automated tasks on the internet — some keep the web running, others drive spam, fraud, and large-scale attacks.

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What Is a Botnet?

A botnet is a network of compromised devices controlled by an attacker and used for coordinated attacks, fraud, and proxy infrastructure.

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What Is a Browser Automation Framework?

A browser automation framework is software that controls a real browser programmatically — built for testing, and repurposed by bots at scale.

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What Is a Brute Force Attack?

A brute force attack systematically tries password combinations until one works — automation makes millions of guesses feasible.

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What Is a CAPTCHA?

A CAPTCHA is a challenge designed to tell humans and automated programs apart, protecting logins, forms and checkouts from abuse by bots.

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What Is a Data Controller vs. a Data Processor?

Under the GDPR, the controller decides why and how personal data is processed while the processor acts on its instructions — a split that assigns liability.

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What Is a Datacenter Proxy?

A datacenter proxy routes traffic through servers in commercial hosting facilities — fast and cheap, but recognizable by its network of origin.

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What Is a DDoS Attack?

A DDoS attack floods a service with traffic from many sources at once to make it unavailable — from raw bandwidth floods to stealthy application-layer attacks.

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What Is a Fake Review?

A fake review is a fabricated customer rating meant to mislead — posted at scale through fake accounts and bots, and increasingly regulated as fraud.

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What Is a False Positive Rate?

The false positive rate is the share of legitimate users a security system wrongly flags as threats — the metric that decides what protection really costs.

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What Is a Good Bot?

A good bot is automated software that helps the sites it visits — search crawlers, monitors, link previews — and identifies itself honestly.

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What Is a Grinch Bot?

A grinch bot is a scalping bot aimed at seasonal must-have products — buying out holiday toys and gift electronics to resell them at inflated prices.

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What Is a Headless Browser?

A headless browser is a web browser that runs without a visible interface, controlled entirely by code — a core tool for testing and for bot operators alike.

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What Is a Honeypot?

A honeypot is a decoy resource that only automation would touch — a hidden form field, fake endpoint, or planted credential that exposes bots on contact.

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What Is a Mobile Proxy?

A mobile proxy routes traffic through cellular carrier IP addresses shared by thousands of real phone users — the hardest proxy class to block by IP.

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What Is a Residential Proxy?

A residential proxy routes traffic through IP addresses of real households, making automated requests look like ordinary home visitors.

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What Is a Risk Score?

A risk score condenses many independent signals into one number expressing how likely a request is automated or fraudulent — the basis for graduated responses.

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What Is a Scalper Bot?

A scalper bot automatically buys limited, high-demand inventory — concert tickets, sneakers, consoles — faster than any human, for resale at a markup.

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What Is a Sneaker Bot?

A sneaker bot is automation built to buy limited-edition releases faster than any human — clearing drops in seconds for the resale market.

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