Britton
4.8K posts

Britton
@BrittonBuilding
Cybersecurity by trade. Trying to build something entrepreneurial for the first time. Simple start with bigger things coming. And a little college football too.






Yes, and here's why. Every traditional authentication method has the same weakness: the secret travels across the network. you type your password; it gets sent somewhere. you type your MFA code, it gets sent somewhere. an attacker who intercepts it can use it. passkeys work differently. when you register a passkey, your device generates two mathematically linked keys. the private key never leaves your device. ever. The website only gets the public key. during login, the website sends a cryptographic challenge. your device signs it with the private key. the website verifies the signature with the public key. No password, OTP code, or anything crosses the network for them to intercept. But the important part is this: the passkey is cryptographically bound to the exact domain you registered it on. if you registered on yourbank.com, the passkey only works on yourbank.com. not yourb4nk.com. not yourbank.login-secure.com. not any fake domain an attacker controls. Even if you're tricked onto a perfect replica of your bank's website, your passkey simply won't work there. And it works: Google deployed security keys and had zero successful phishing attacks across 85,000 employees. Cloudflare survived a sophisticated phishing campaign that compromised other companies because of passkeys. Snap reported zero account takeovers for over two years after deploying FIDO2 keys. The BUT is that passkeys only protect the login. If your platform offers SMS as a fallback "in case you lose your passkey," the attacker just uses the fallback. the chain is only as strong as its weakest link.







