Events
QuSecure Demonstrates Tier-1 Telecom Path to Post Quantum TLS Without Rewriting Legacy Applications
A Tier-1 operator introduced post-quantum secure communications into existing network infrastructure without touching legacy application code.
Mobile World Congress Session Highlighted Tier-1 Telecom Case Study Demonstrating New Path to Post-Quantum Readiness Across Existing Telecom Infrastructure
SAN MATEO, Calif. — March 6, 2026 — QuSecure™, Inc., the market leader in post-quantum cybersecurity and cryptographic agility, this week presented a telecom case study at Mobile World Congress Barcelona (MWC) demonstrating how a Tier-1 telecommunications operator introduced post-quantum secure communications into existing network infrastructure without requiring changes to legacy application code.
The case study selected for presentation at MWC, titled “First Post-Quantum Implementations in the Telco Ecosystem,” highlighted real-world deployment of post-quantum cryptography (PQC) in telecommunications networks. Presented by QuSecure SVP of Global Strategy and Research Garfield Jones, the case study outlines how the operator upgraded services to TLS 1.3 via hybrid post-quantum key exchange using NIST PQC algorithms (X25519 combined with ML-KEM-768) while maintaining operational continuity across existing systems.
The initiative, completed by QuSecure in collaboration with Accenture, introduced centralized cryptographic policy management to provide visibility into cryptographic dependencies across the telecom network. The phased deployment spanned edge services, internal service-to-service connections, and hardened core transport links.
“This case study serves as a playbook for other telcos looking to operationalize post-quantum cryptographic readiness while building in control and agility for continued visibility,” said Jones. “This proves a realistic path for how quantum-resistant TLS can be introduced across existing networks, leaving existing applications unchanged.”
Using QuSecure’s gateway proxy layer-based cryptographic service mesh, the operator introduced PQC and quantum-safe cryptography protections at the network layer, securing legacy application communications without code changes or infrastructure replacement. TLS termination at these proxies enabled encryption upgrades across numerous services (including those supporting older TLS or plaintext), addressing the cryptographic debt common across brownfield telecom infrastructure.
In this deployment, the operator introduced PQC incrementally across its infrastructure while maintaining service availability and performance. The operator concluded that a software-based crypto-agile architecture supporting NIST PQC standards offered the most scalable path for its global telecom network (over QKD).
About QuSecure
QuSecure is a post-quantum cryptography (PQC) and crypto-agility pioneer that gives an enterprise one place to set and enforce cryptographic policy across its infrastructure. Recognized as the Global Post-Quantum Cryptography Product Leader, QuSecure enables organizations to build a complete cryptographic inventory across their networks, enforce policy-based governance, and roll out compliant cryptography, from TLS upgrades to full post-quantum migration, without application rewrites. Its QuProtect R3 platform enables security teams to swap algorithms and push cryptographic policy changes across their entire network from one place. Backwards compatible with legacy infrastructure, QuProtect R3 operates across cloud, on-premises, air-gapped, and sovereign environments, supporting compliance with CNSSP 15/NSM-10, CNSA 2.0, PCI DSS, DORA, and more. Customers include U.S. defense agencies, global financial institutions, and critical infrastructure providers.
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