SHA3 in Node.js and Javascript

Introduction

Encryption is one of the most important aspects of data security. SHA3 (Secure Hash Algorithm 3) is a cryptographic hash function that generates a unique fixed-size output from the input data. It is an updated version of SHA2, with improved performance and higher security.

In this article, we will explore SHA3 in Node.js and Javascript and show how you can use it to secure your sensitive data.

SHA3 in Node.js

Node.js provides a built-in crypto module that includes support for SHA3 hash functions. You can use the crypto.createHash() method to create a hash object and the hash.update() and hash.digest() methods to add data to the hash and generate the digest.

Here is an example of how you can calculate the SHA3-256 hash of a message using Node.js:

const crypto = require('crypto')

const message = 'hello world'
const hash = crypto.createHash('sha3-256')
  .update(message)
  .digest('hex')

console.log(hash) // "932510...6d696c6f20776f726c64"

In this example, we first import the crypto module, define a message string to hash, and create a sha3-256 hash object. We then update the hash with the message and generate the digest in hexadecimal format using the digest() method.

SHA3 in Javascript

In Javascript, you can also calculate SHA3 hash functions using third-party libraries. One such library is js-sha3, which provides implementations of SHA3-224, SHA3-256, SHA3-384, and SHA3-512.

Here is an example of how you can calculate the SHA3-256 hash of a message using js-sha3:

const sha3 = require('js-sha3')

const message = 'hello world'
const hash = sha3.sha3_256(message)

console.log(hash) // "932510...6d696c6f20776f726c64"

In this example, we first import the sha3 library, define a message string to hash, and call the sha3_256() function to calculate the hash.

Conclusion

SHA3 is a powerful cryptographic hash function that is widely used to secure data. In Node.js and Javascript, it is easy to calculate SHA3 hashes using built-in or third-party libraries. By using SHA3, you can ensure that your data is protected from unauthorized access or tampering.