Science Knowings: JavaScript Course For Social Media

Secure Password Storage (Hashing)

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We all know that data encryption is critical for protecting sensitive information, and copywriting is powerful in conveying messages. By combining these concepts, we gain a unique advantage in securing our online presence.

Secure Password Storage (Hashing)

Storing passwords securely is paramount in today's digital world. Hashing plays a vital role in achieving this, ensuring that even if a database is compromised, the passwords remain protected.

Why Hashing?

Hashing is employed to prevent the storage of plaintext passwords, making it extremely difficult for attackers to access them. It irreversibly converts passwords into a fixed-length string, making them useless to unauthorized individuals.

How Hashing Works

Hashing algorithms take an input of any length and generate a fixed-length output called a hash. This output is unique and cannot be reversed to retrieve the original input. It acts as a digital fingerprint, representing the input.

Uses of Hashing

Hashing finds applications beyond password storage. It's used in:

  • Verifying data integrity
  • Creating digital signatures
  • Securing blockchain transactions

Salting: Enhance Security

Salting involves adding a random string to the password before hashing. This makes it even harder for attackers to perform pre-computed dictionary attacks, as the hash value will be unique for each password and salt combination.

Popular Hashing Algorithms

Various hashing algorithms are available, each with its strengths and weaknesses. Some popular choices include:

AlgorithmHash Length
MD5128 bits
SHA-256256 bits


MD5 is a widely used hashing algorithm that produces a 128-bit hash value. However, it is no longer considered secure due to its vulnerability to collision attacks.


SHA-256 is a more secure alternative to MD5, producing a 256-bit hash value. It is widely used in various security applications.


bcrypt is a password hashing function designed to be slow and computationally intensive. It produces a customized hash length and is highly resistant to brute-force attacks as it slows down the hashing process.


scrypt is another password hashing function similar to bcrypt. It uses a memory-hard function to make brute-force attacks more challenging and is suitable for high-security applications.

How to Implement Hashing in JavaScript

Several libraries and frameworks in JavaScript provide hashing functionality. One popular option is the crypto module, which offers a range of hashing algorithms:

const crypto = require('crypto');
const hash = crypto.createHash('sha256');
const hashedPassword = hash.digest('hex');

Use Cases for Hashing

Hashing has various use cases in web development, including:

  • Storing passwords securely in databases
  • Verifying user logins
  • Securing data transmitted over networks

Security Considerations

While hashing is a powerful tool, it's essential to consider the following security factors:

  • Use a strong and secure hashing algorithm
  • Implement salting to enhance security
  • Store hashes securely and avoid exposing them to unauthorized parties

Best Practices for Secure Password Storage

Follow these best practices to ensure secure password storage:

  • Never store passwords in plaintext
  • Use a strong hashing algorithm with salting
  • Implement rate-limiting to prevent brute-force attacks
  • Regularly review and update your security measures

Next Up: Two-Factor Authentication (2FA)

In the next session, we'll delve into Two-Factor Authentication (2FA) and its importance in enhancing account security. By adding an extra layer of protection, you can safeguard your users' accounts from unauthorized access. Follow us to stay informed!