Node.js crypto.pbkdf2() Method Last Updated : 11 Oct, 2021 Comments Improve Suggest changes Like Article Like Report The crypto.pbkdf2() method gives an asynchronous Password-Based Key Derivation Function 2 i.e. (PBKDF2) implementation. Moreover, a particular HMAC digest algorithm which is defined by digest is implemented to derive a key of the required byte length (keylen) from the stated password, salt, and iterations. Syntax: crypto.pbkdf2( password, salt, iterations, keylen, digest, callback ) Parameters: This method accepts six parameters as mentioned above and described below: password: It can holds string, Buffer, TypedArray, or DataView type of data. salt: It must be as unique as possible. However, it is recommended that a salt is arbitrary and in any case it is at least 16 bytes long. It is of type string, Buffer, TypedArray, or DataView. iterations: It must be a number and should be set as high as possible. So, the more is the number of iterations, the more secure the derived key will be, but in that case it takes greater amount of time to complete. It is of type number. keylen: It is the key of the required byte length and it is of type number. digest: It is digest algorithms of string type. callback: It is a function with two parameters namely err, and derivedKey. Return Type: It returns the derived password based key. Below example illustrate the use of crypto.pbkdf2() method in Node.js: Example 1: javascript // Node.js program to demonstrate the // crypto.pbkdf2() method // Including crypto module const crypto = require('crypto'); // Implementing pbkdf2 with all its parameters crypto.pbkdf2('secret', 'salt', 100000, 64, 'sha512', (err, derivedKey) => { if (err) throw err; // Prints derivedKey console.log(derivedKey.toString('hex')); }); Output: 3745e482c6e0ade35da10139e797157f4a5da669dad7d5da88ef87e 47471cc47ed941c7ad618e827304f083f8707f12b7cfdd5f489b782 f10cc269e3c08d59ae Example 2: javascript // Node.js program to demonstrate the // crypto.pbkdf2() method // Including crypto module const crypto = require('crypto'); // Implementing pbkdf2 with all its parameters // but digest is null crypto.pbkdf2('secret', 'salt', 677, 6, null, (err, derivedKey) => { if (err) { console.log(err); } else { // Prints derivedKey without encoding console.log(derivedKey); } }); Output: Here, a buffer is returned as a derived key is not changed to string. Buffer 71 1e 7b 7b 9b 53 Reference: https://nodejs.org/api/crypto.html#crypto_crypto_pbkdf2_password_salt_iterations_keylen_digest_callback Comment More infoAdvertise with us Next Article Node crypto.createHash() Method N nidhi1352singh Follow Improve Article Tags : Web Technologies Node.js Node.js-crypto-module Similar Reads Node.js cipher.final() Method The cipher.final() method in Node.js is used to signal to the cipher object that the encryption or decryption process is complete. This method must be called after all data has been passed to the cipher object using the cipher.update() method. The cipher.final() method returns the remaining encrypte 2 min read Node.js cipher.update() Method The cipher.update() method is an inbuilt application programming interface of class Cipher within crypto module which is used to update the cipher with data according to the given encoding format. 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