This post is the selection of useful npm modules:

1. OTPAuth - One Time Password (HOTP/TOTP) library for Node.js, Deno, Bun and browsers.

HOTP (HMAC-based One-Time Password) and TOTP (Time-based One-Time Password) are two commonly used algorithms for generating one-time passwords (OTP) in two-factor authentication systems.
HOTP generates OTPs based on a counter value and a secret key using a hash-based message authentication code (HMAC) algorithm. Each time a new OTP is generated, the counter value is incremented.
TOTP, on the other hand, generates OTPs based on a combination of a secret key and the current time. A timestamp is used as the counter value, and the OTP changes every 30 seconds (default value).

2. Concurrent.js - Non-blocking Computation for JavaScript RTEs (Web Browsers, Node.js & Deno).

Non-blocking computation is a technique used to allow JavaScript runtime environments (RTEs) to perform computationally intensive tasks without blocking the main thread of execution. This is achieved by executing these tasks asynchronously, using features such as web workers or worker threads.
In JavaScript, blocking the main thread can lead to performance issues and a poor user experience, as the user interface may become unresponsive while the script is running. Non-blocking computation helps to mitigate this issue by allowing these tasks to be performed in the background, without affecting the responsiveness of the user interface.

3. Malibu - Framework-agnostic CSRF middleware for modern Node.js

CSRF (Cross-Site Request Forgery) is a type of web attack where an attacker tricks a user into performing an unintended action on a web application. The attack typically involves the attacker crafting a request to the application, and then tricking the user into submitting that request through some form of social engineering, such as by clicking on a malicious link or visiting a page with a hidden form.
One common example of a CSRF attack is when an attacker creates a malicious form on a website, which is designed to submit a request to a different website that the user is already logged in to. If the user is tricked into submitting the form, the attacker can execute a malicious action on the targeted website on behalf of the user.
To prevent CSRF attacks, developers can implement security measures such as using anti-CSRF tokens or implementing same-site cookies. These measures can help to ensure that a request is only processed if it originates from an authorized source, and can help to prevent unauthorized actions on the targeted website.

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#nodejs #deno #bun #npm #csrf