Core ModulesLesson 30Free preview

Crypto Module

This lesson is part of Node.js · All levels

Summary

Crypto modules provide inborn cryptographic capabilities such as hashing, encryption, decryption, and random value creation. You can create a SHA-256 hash to verify integrity or generate a secure random token. This module is particularly relevant for application authentication and security.

Key points

CreateHash produces a fixed hash like sha256 from a data
CreateCipheriv/createDecipheriv for symmetric encryption (e.g. aes-256-cbc)
RandomBytes generate a cryptographically secure token or IV
Hash is one-way and cannot be reversed to the original text

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