crypto Archives | JS FAQ - JavaScript Guides Online

RSA encryption using the `publicEncrypt` method in the crypto module allows secure data transmission. Base64-encoded ciphertext ensures compatibility, while the `privateDecrypt` method retrieves the original message. Implementing hybrid encryption and hashing techniques enhances security and data integrity in Node.js applications.

Crypto and Utilities

How to verify HMAC signatures in Node.js

Crypto and Utilitiescrypto, hmac, node.js, validate

HMAC validation is crucial for application security, but common pitfalls can undermine its effectiveness. Key issues include inconsistent message serialization, neglecting timing-safe comparisons, and poor key management. Using secure hash algorithms and handling replay attacks effectively are essential practices for maintaining integrity and reliability.

Crypto and Utilities

How to create HMAC signatures in Node.js

Crypto and Utilitiesauthentication, crypto, hmac, node.js

Implementing HMAC in Node.js involves using the crypto module to generate HMACs for message integrity and authenticity. The process includes importing the crypto module, defining a function with a secret key and message, and using algorithms like sha256. This method is essential for secure API communication and validation.

How to return a value from a function in JavaScript

Crypto and Utilities

How to encrypt and decrypt text in Node.js

Crypto and Utilitiesaes, crypto, encryption, node.js

Implementing decryption in Node.js involves using the crypto module's createDecipheriv method with the same algorithm, key, and IV as encryption. This guide covers creating a decryption function, securely managing keys, and highlights potential vulnerabilities. Additionally, it introduces RSA for asymmetric encryption, enhancing data security in applications.

Crypto and Utilities

How to generate cryptographically secure random numbers in Node.js

Crypto and Utilitiescrypto, node.js, randomBytes, secure

The crypto module in Node.js offers secure random number generation methods like randomBytes and randomUUID, essential for creating cryptographic keys, tokens, session IDs, and unique identifiers. These methods provide cryptographically strong randomness not achievable with Math.random().

Crypto and Utilities

How to hash a password securely in Node.js

Crypto and Utilitiesbcrypt, crypto, node.js, password

Secure password hashing in Node.js using bcrypt: implement algorithms like Argon2, PBKDF2, salting, iterations, and verification code for robust user authentication.

Crypto and Utilities

How to hash a string using SHA256 in Node.js

Crypto and Utilitiescrypto, hash, node.js, sha256

SHA256 is a cryptographic hash function that produces a 256-bit hash, crucial for data integrity in applications like SSL/TLS and blockchain. This article covers its implementation in Node.js, including hashing data and files, securing passwords with salts, and common pitfalls like encoding issues and object serialization errors.