• Cisco Blogs/Networking/Why post-quantum cryptography matters for securing campus and branch networks Why post-quantum cryptography matters for securing campus and branch networks 3 min read Albert Chiang As quantum computing rapidly advances, it presents a profound threat to the cryptographic foundations that currently secure our digital communications. • This risk is particularly pronounced in the campus and branch networks that connect a vast array of today’s users, IoT and OT devices, and applications across multiple, diverse locations. • This extensive connectivity significantly expands the attack surface and increases network complexity, which makes security enforcement more challenging and heightens vulnerability to sophisticated threats, including those posed by quantum computing. • Consequently, these environments require robust, quantum-resilient security measures to safeguard critical communications and data integrity. • For organizations like Cisco, ensuring the security of campus and branch networks against future quantum attacks is critical. • This blog provides a gentle introduction to post-quantum cryptography (PQC), explaining why it matters and how it is shaping the future of network security.
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- Summary
The rapid progress of quantum computing threatens the public‑key cryptographic algorithms (RSA, DH, ECC) that secure campus and branch networks, which connect thousands of users, IoT, and OT devices across multiple sites. These environments have expanded attack surfaces and complex infrastructures, making them vulnerable to quantum‑powered attacks. Post‑quantum cryptography (PQC) offers mathematically‑based algorithms resistant to both classical and quantum attacks. In August 2024, NIST released its first PQC standards, with enterprise and government adoption slated for 2025‑2026. Organizations such as Cisco are emphasizing PQC to protect critical communications, authentication, and key exchange in campus and branch networks against future quantum threats.
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