Author: Gurdeep Gill

Gurdeep GillGurdeep Gill is a Software Engineering Technical Leader at Cisco Systems with over a decade of experience in encrypted traffic inspection, secure protocol engineering, and automation. She has contributed to advanced technologies such as TLS 1.3, QUIC, HTTP3, and Post-Quantum Cryptography, developing innovative firewall and security automation solutions. Gurdeep is passionate about mentoring and sharing knowledge to inspire the next generation of cybersecurity professionals. Her work safeguards critical sectors including healthcare, finance, and government.CISCO Systems

 

 

Beyond TLS: Simulating the Real Internet to Build Resilient Security Systems

Author(s):

Gurdeep Gill, Software Engineer Technical Leader, CISCO Systems

by
Beyond TLS: Simulating the Real Internet to Build Resilient Security Systems

The Encryption Paradox Encryption is the backbone of digital trust.  Every web session, API call, and remote connection now travel through layers of Transport Layer Security (TLS), QUIC, or VPN tunnels.  While this shields users from eavesdropping, it also blinds the very systems designed to protect them. Modern Next Generation Firewalls (NGFWs), Secure Access solutions, … Read more

From the Winter 2026 Issue

The Quantum Threat Is Already Here: We Just Can’t See It Yet

Author(s):

Gurdeep Gill, Software Engineer Technical Leader, CISCO Systems

by
The Quantum Threat is Already Here

Nation-states are harvesting encrypted data right now, banking on quantum computers to crack it open in the coming years. The Attack That Leaves No Trace Your encrypted data is being stolen right now. Not by attackers trying to break your encryption today, but by adversaries who understand that quantum computing will eventually make current cryptographic … Read more

Tested to Work, Not Tested to Secure: Why Critical Crypto Bugs Hide for Years

Author(s):

Gurdeep Gill, Software Engineer Technical Leader, CISCO Systems

by
Tested to Work, Not Tested to Secure

Heartbleed (CVE-2014-0160) lurked in OpenSSL for two years. These simple missing bounds check exposed private keys across hundreds of thousands of servers. OpenSSL had passed its tests. The encryption worked correctly. But those tests never checked if the code was secure. This isn’t isolated. Critical bugs persist in production cryptographic libraries for years despite protecting … Read more

Machine Learning in Threat Detection: What Actually Works

Author(s):

Gurdeep Gill, Software Engineer Technical Leader, CISCO Systems

by
machine-learning-in-threat-detection

December 2020. FireEye discovers they’ve been breached. The attackers had been inside for months. They used legitimate credentials. No malware signatures. No known indicators of compromise. Traditional security tools saw nothing wrong. This was the SolarWinds attack, one of the most sophisticated supply chain compromises in history. It affected 18,000 organizations including Fortune 500 companies … Read more

Cybersecurity as a Pillar of National Security: A Fight for Our Future

Author(s):

Gurdeep Gill, Software Engineer Technical Leader, CISCO Systems

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Cybersecurity as a Pillar of National Security: A Fight for Our Future

Cybersecurity is undergoing an unprecedented transformation. AI’s growing adaptability now enables autonomous, evasive attacks. Simultaneously, quantum computers draw ever closer, capable of shattering our strongest encryption. These dual forces fundamentally reshape national security. Our nations now live and breathe through vast, interconnected networks, making every critical function inherently digital. This profound reality elevates cybersecurity to … Read more

From the Fall 2025 Issue

Unmasking the Encrypted Threat: Reclaiming Visibility in TLS 1.3 & QUIC Era

Author(s):

Gurdeep Gill, Software Engineer Technical Leader, CISCO Systems

by
Unmasking the Encrypted Threat - CISCO

For decades, encryption has served as the foundational pillar of digital security. It has rigorously safeguarded sensitive data and ensuring privacy across global networks. However, this core technology, while engineered as a protective measure, has counter-intuitively introduced a significant operational hurdle for modern cybersecurity teams. The widespread adoption of advanced protocols like TLS 1.3 and … Read more