diff --git a/src/core/operations/DerivePBKDF2Key.mjs b/src/core/operations/DerivePBKDF2Key.mjs
deleted file mode 100644
index e4b9c406..00000000
--- a/src/core/operations/DerivePBKDF2Key.mjs
+++ /dev/null
@@ -1,78 +0,0 @@
-/**
- * @author n1474335 [n1474335@gmail.com]
- * @copyright Crown Copyright 2016
- * @license Apache-2.0
- */
-
-import Operation from "../Operation.mjs";
-import Utils from "../Utils.mjs";
-import forge from "node-forge/dist/forge.min.js";
-
-/**
- * Derive PBKDF2 key operation
- */
-class DerivePBKDF2Key extends Operation {
-
-    /**
-     * DerivePBKDF2Key constructor
-     */
-    constructor() {
-        super();
-
-        this.name = "Derive PBKDF2 key";
-        this.module = "Ciphers";
-        this.description = "PBKDF2 is a password-based key derivation function. It is part of RSA Laboratories' Public-Key Cryptography Standards (PKCS) series, specifically PKCS #5 v2.0, also published as Internet Engineering Task Force's RFC 2898.<br><br>In many applications of cryptography, user security is ultimately dependent on a password, and because a password usually can't be used directly as a cryptographic key, some processing is required.<br><br>A salt provides a large set of keys for any given password, and an iteration count increases the cost of producing keys from a password, thereby also increasing the difficulty of attack.<br><br>If you leave the salt argument empty, a random salt will be generated.";
-        this.infoURL = "https://wikipedia.org/wiki/PBKDF2";
-        this.inputType = "string";
-        this.outputType = "string";
-        this.args = [
-            {
-                "name": "Passphrase",
-                "type": "toggleString",
-                "value": "",
-                "toggleValues": ["UTF8", "Latin1", "Hex", "Base64"]
-            },
-            {
-                "name": "Key size",
-                "type": "number",
-                "value": 128
-            },
-            {
-                "name": "Iterations",
-                "type": "number",
-                "value": 1
-            },
-            {
-                "name": "Hashing function",
-                "type": "option",
-                "value": ["SHA1", "SHA256", "SHA384", "SHA512", "MD5"]
-            },
-            {
-                "name": "Salt",
-                "type": "toggleString",
-                "value": "",
-                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
-            }
-        ];
-    }
-
-    /**
-     * @param {string} input
-     * @param {Object[]} args
-     * @returns {string}
-     */
-    run(input, args) {
-        const passphrase = Utils.convertToByteString(args[0].string, args[0].option),
-            keySize = args[1],
-            iterations = args[2],
-            hasher = args[3],
-            salt = Utils.convertToByteString(args[4].string, args[4].option) ||
-                forge.random.getBytesSync(keySize),
-            derivedKey = forge.pkcs5.pbkdf2(passphrase, salt, iterations, keySize / 8, hasher.toLowerCase());
-
-        return forge.util.bytesToHex(derivedKey);
-    }
-
-}
-
-export default DerivePBKDF2Key;