How To Generate Unique OTP In JavaScript

How To Generate Unique OTP In JavaScript

By JavaScripts Magic

An OTP Is A One-Time Password Used For Secure Transactions.  It’s Unique And Valid For Only One Login Or Session.

What Is An OTP?

01/06

Why Generate Unique OTP? 

Unique OTPs Ensure Maximum Security By Preventing Unauthorized Access.

They Expire Quickly, Making Them Ideal For Sensitive Operations.  

02/06

Basics Of OTP Generation In JavaScript 

JavaScript Can Generate Random Numbers To Create An OTP.

OTPs Are Usually 4 To 6 Digits For Simplicity And Security.  

03/06

Simple Method To Generate OTP Using Math.random() 

Use Math.random() To Get A Random Decimal Value Between 0 And 1. 

Multiply It By A Power Of 10 And Use Math.floor() To Round Down. 

03/06

Example Code To Generate A 6-Digit OTP 

let otp = Math.floor(Math.random() * 1000000); 

This Will Generate A Random OTP Between 000000 And 999999. 

04/06

Ensuring The OTP Is Always 6 Digits 

Use String.padStart() To Add Leading Zeros If Needed. 

otp.toString().padStart(6, '0'); 

05/06

Making The OTP More Secure With Crypto API 

Use Crypto.getRandomValues() For A More Secure OTP. 

This Provides A Cryptographically Secure Random Number Generation.

05/06

Final Code Example For Secure OTP Generation 

Use This Code For Maximum Security: 

let array = new Uint32Array(1); crypto.getRandomValues(array);

Thanks For Reading!

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