---
title: "Shubham Kumar (@chmodshubham) | Hashnode"
description: "Write whatever I knows. Read the latest articles by Shubham Kumar on Hashnode."
url: "https://hashnode.com/@chmodshubham"
---

@chmodshubham

# Shubham Kumar

@chmodshubham · Delhi, India · Joined February 2022

Write whatever I knows.

### [How LibOQS Uses Valgrind to Hunt for Constant-Time Leaks?](https://chmodshubham.hashnode.dev/how-liboqs-uses-valgrind-to-hunt-for-constant-time-leaks?utm_source=hashnode&utm_medium=feed)

Learn how liboqs utilizes Valgrind to identify non-constant-time behavior to protect against timing attacks in cryptographic implementations

7 min read · [chmodshubham.hashnode.dev](https://chmodshubham.hashnode.dev/how-liboqs-uses-valgrind-to-hunt-for-constant-time-leaks?utm_source=hashnode&utm_medium=feed)

[Nov 6, 2025](https://hashnode.com/posts/how-liboqs-uses-valgrind-to-hunt-for-constant-time-leaks/692a91969dfdc6211fd67599)

### [Constant Time Implementation for Cryptography](https://chmodshubham.hashnode.dev/constant-time-implementation-for-cryptography?utm_source=hashnode&utm_medium=feed)

Explore constant time cryptographic techniques to prevent timing attacks, protect data, and learn implementations and countermeasures

13 min read · [chmodshubham.hashnode.dev](https://chmodshubham.hashnode.dev/constant-time-implementation-for-cryptography?utm_source=hashnode&utm_medium=feed)

[Oct 26, 2025](https://hashnode.com/posts/constant-time-implementation-for-cryptography/692a90b5aa0ad83048f58a8a)

### [Understanding IPsec: How Internet Security Works](https://chmodshubham.hashnode.dev/understanding-ipsec-how-internet-security-works?utm_source=hashnode&utm_medium=feed)

IPsec secures internet communications through authentication, integrity, encryption, protocols, key exchanges, and security frameworks

15 min read · [chmodshubham.hashnode.dev](https://chmodshubham.hashnode.dev/understanding-ipsec-how-internet-security-works?utm_source=hashnode&utm_medium=feed)

[Jul 1, 2025](https://hashnode.com/posts/understanding-ipsec-how-internet-security-works/692a8fe23fae7bd169260a22)

### [QUIC: The Future of Internet Transport](https://chmodshubham.hashnode.dev/quic-the-future-of-internet-transport?utm_source=hashnode&utm_medium=feed)

QUIC revolutionizes internet transport with faster connections and improved efficiency, surpassing traditional protocols like TCP and TLS

15 min read · [chmodshubham.hashnode.dev](https://chmodshubham.hashnode.dev/quic-the-future-of-internet-transport?utm_source=hashnode&utm_medium=feed)

[Jun 26, 2025](https://hashnode.com/posts/quic-the-future-of-internet-transport/692a8f29b824351d5f99608c)

### [TLS/SSL Connection](https://chmodshubham.hashnode.dev/tlsssl-connection?utm_source=hashnode&utm_medium=feed)

Explore the fundamentals of TLS/SSL connections, their history, certificate verification, and how they secure your online communications

5 min read · [chmodshubham.hashnode.dev](https://chmodshubham.hashnode.dev/tlsssl-connection?utm_source=hashnode&utm_medium=feed)

[Jun 22, 2025](https://hashnode.com/posts/tlsssl-connection/692a8e86b2c9a8d0026e25c6)