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An OTP (One Time Password) is valid for exactly 30–60 seconds.
Even though no one stores it anywhere. So, how does the server verify it without ever saving it?
Well, that’s usually called a Time-based One-Time Password (TOTP).
Here’s how it actually works:
• A secret key is shared between your device and the server (only once)
• Both use the current time window (like 30 seconds)
• And a secure algorithm (HMAC)
Using these, both sides generate the same OTP independently.
✅ No storage
✅ No database lookup
✅ Just math + time
When you enter the OTP, the server simply regenerates it and checks:
👉 “Does this match?”
That’s how your OTP is verified… without ever being saved. 🔐
Frequent VPN disconnections can expose your real IP address, online activity, and unencrypted data traffic to your Internet Service Provider (ISP), hackers, or government surveillance. The most common reasons for VPN disconnections include network instability, incorrect settings, overloaded servers, or software issues.
If you find this helpful, share it with loved ones. ❤️
#vpn #security #privacy #tech #TechGuide #technology #techinfo #TechInnovation #howto
Resetting Windows 11 (using the Reset this PC feature) reinstalls the operating system and fixes performance issues by reverting settings to their defaults. You can choose to either keep personal files (removes apps/settings) or remove everything (full factory reset). It generally takes 30 minutes to one hour, depending on system configuration.
#windows11 #windows10 #Microsoft #Tech #howto #technology #Techguide #Techinfo #computer #learn
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