DEV Community

Apurv Upadhyay
Apurv Upadhyay

Posted on

1 1 1 1 1

๐Ÿ’ก ๐—›๐—ฎ๐˜ƒ๐—ฒ ๐˜†๐—ผ๐˜‚ ๐—ฆ๐—ฒ๐—ฐ๐˜‚๐—ฟ๐—ฒ๐—ฑ ๐—–๐—น๐—ถ๐—ฒ๐—ป๐˜-๐—ฆ๐—ฒ๐—ฟ๐˜ƒ๐—ฒ๐—ฟ ๐——๐—ฎ๐˜๐—ฎ ๐˜„๐—ถ๐˜๐—ต ๐—˜๐—ป๐—ฐ๐—ฟ๐˜†๐—ฝ๐˜๐—ถ๐—ผ๐—ป? ๐Ÿ”’

In todayโ€™s digital landscape, securing the communication between clients and servers is critical. Encrypting data on the client side and decrypting it on the server ensures your information remains private ,safe and unreadable, even if intercepted.

Image description

๐ŸŒ ๐—›๐—ผ๐˜„ ๐—œ๐˜ ๐—ช๐—ผ๐—ฟ๐—ธ๐˜€:

  1. ๐—˜๐—ป๐—ฐ๐—ฟ๐˜†๐—ฝ๐˜๐—ถ๐—ผ๐—ป ๐—ผ๐—ป ๐˜๐—ต๐—ฒ ๐—–๐—น๐—ถ๐—ฒ๐—ป๐˜ ๐—ฆ๐—ถ๐—ฑ๐—ฒ: The client encrypts the payload using a shared ๐—ฒ๐—ป๐—ฐ๐—ฟ๐˜†๐—ฝ๐˜๐—ถ๐—ผ๐—ป ๐—ธ๐—ฒ๐˜† before sending the request to the server.
  2. ๐——๐—ฒ๐—ฐ๐—ฟ๐˜†๐—ฝ๐˜๐—ถ๐—ผ๐—ป ๐—ผ๐—ป ๐˜๐—ต๐—ฒ ๐—ฆ๐—ฒ๐—ฟ๐˜ƒ๐—ฒ๐—ฟ ๐—ฆ๐—ถ๐—ฑ๐—ฒ: The server, using the ๐˜€๐—ฎ๐—บ๐—ฒ ๐—ฒ๐—ป๐—ฐ๐—ฟ๐˜†๐—ฝ๐˜๐—ถ๐—ผ๐—ป ๐—ธ๐—ฒ๐˜†, decrypts the payload to process the original information.

๐Ÿ”ง๐—–๐—ผ๐—บ๐—บ๐—ฝ๐—ผ๐—ป๐—ฒ๐—ป๐˜๐˜€:
โ€ข ๐—–๐—ฟ๐˜†๐—ฝ๐˜๐—ผ๐—๐—ฆ: A popular JavaScript library used for cryptographic operations like encryption and hashing.
โ€ข ๐—”๐—˜๐—ฆ ๐—”๐—น๐—ด๐—ผ๐—ฟ๐—ถ๐˜๐—ต๐—บ: A symmetric key algorithm that uses the same key for encryption and decryption.
โ€ข ๐—–๐—•๐—– ๐— ๐—ผ๐—ฑ๐—ฒ: Cipher Block Chaining mode, ensuring that each block of plaintext is encrypted with the previous one for added security.
โ€ข ๐—œ๐—ป๐—ถ๐˜๐—ถ๐—ฎ๐—น๐—ถ๐˜‡๐—ฎ๐˜๐—ถ๐—ผ๐—ป ๐—ฉ๐—ฒ๐—ฐ๐˜๐—ผ๐—ฟ (๐—œ๐—ฉ): A randomly generated value used to ensure that the encryption produces different outputs, even for identical inputs.
โ€ข ๐—ฃ๐—ž๐—–๐—ฆ๐Ÿณ ๐—ฃ๐—ฎ๐—ฑ๐—ฑ๐—ถ๐—ป๐—ด: Padding ensures the plaintext aligns with the block size requirements.

๐Ÿ›ก๏ธ ๐—•๐—ฒ๐—ป๐—ฒ๐—ณ๐—ถ๐˜๐˜€ ๐—ผ๐—ณ ๐—ง๐—ต๐—ถ๐˜€ ๐—”๐—ฝ๐—ฝ๐—ฟ๐—ผ๐—ฎ๐—ฐ๐—ต:
โ€ข ๐——๐—ฎ๐˜๐—ฎ ๐—ฃ๐—ฟ๐—ถ๐˜ƒ๐—ฎ๐—ฐ๐˜†: Even if the payload is intercepted, it remains unreadable without the encryption key.
โ€ข ๐—ฆ๐—ฒ๐—ฐ๐˜‚๐—ฟ๐—ถ๐˜๐˜†: Adding a random IV ensures that the same plaintext encrypted multiple times will yield different ciphertexts.
โ€ข ๐—œ๐—ป๐˜๐—ฒ๐—ด๐—ฟ๐—ถ๐˜๐˜†: Decrypting with the same key guarantees that only the intended recipient can read the data.

๐Ÿ“Œ ๐—•๐—ฒ๐˜€๐˜ ๐—ฃ๐—ฟ๐—ฎ๐—ฐ๐˜๐—ถ๐—ฐ๐—ฒ๐˜€:
โ€ข ๐—ž๐—ฒ๐—ฒ๐—ฝ ๐˜๐—ต๐—ฒ ๐—ฒ๐—ป๐—ฐ๐—ฟ๐˜†๐—ฝ๐˜๐—ถ๐—ผ๐—ป ๐—ธ๐—ฒ๐˜† ๐˜€๐—ฒ๐—ฐ๐˜‚๐—ฟ๐—ฒ: Never hard-code it directly; store it securely on both client and server.
โ€ข ๐—จ๐˜€๐—ฒ ๐—›๐—ง๐—ง๐—ฃ๐—ฆ alongside encryption to protect data in transit and prevent man-in-the-middle attacks..
โ€ข ๐—ฅ๐—ผ๐˜๐—ฎ๐˜๐—ฒ ๐—ฒ๐—ป๐—ฐ๐—ฟ๐˜†๐—ฝ๐˜๐—ถ๐—ผ๐—ป keys regularly to maintain a high level of security.

By implementing these steps, you can safeguard your client-server communication effectively. ๐Ÿ”’

Iโ€™ve created a detailed post on Medium with step-by-step instructions and code examples. Feel free to check it out!๐Ÿ—ž๏ธ๐Ÿ“œ๏ธ:https://lnkd.in/ek9pXF5t

Please repost this ๐Ÿ” if you find it useful. ๐Ÿ”” Follow Apurv Upadhyay โ˜๏ธ for more content like this

encryption #webSecurity #javaScript #cryptoJS #dataProtection#programmingTips #secureCoding #clientServer

Image of Datadog

Create and maintain end-to-end frontend tests

Learn best practices on creating frontend tests, testing on-premise apps, integrating tests into your CI/CD pipeline, and using Datadogโ€™s testing tunnel.

Download The Guide

Top comments (0)

Billboard image

The Next Generation Developer Platform

Coherence is the first Platform-as-a-Service you can control. Unlike "black-box" platforms that are opinionated about the infra you can deploy, Coherence is powered by CNC, the open-source IaC framework, which offers limitless customization.

Learn more