# SD-WAN security

Published articles for SD-WAN security.

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## Crypto Agility: Why PQC Is Not a One-Time Upgrade

DevFeed: [Crypto Agility: Why PQC Is Not a One-Time Upgrade](<https://devfeed.tech/articles/crypto-agility-why-pqc-is-not-a-one-time-upgrade-8419.md>)

Original publisher: [Read original article](<https://blogs.cisco.com/security/crypto-agility-why-pqc-is-not-a-one-time-upgrade/>)

Author: Hugo Vliegen

Published: 2026-09-03T15:00:56Z

Content type: article

Language: en

Sources: [Security @ Cisco Blogs](<https://devfeed.tech/sources/security-cisco-blogs.md>)

Topics: [Cryptography](<https://devfeed.tech/topics/cryptography.md>), [networking](<https://devfeed.tech/topics/networking.md>), [Network design](<https://devfeed.tech/topics/network-design.md>), [Vulnerabilities](<https://devfeed.tech/topics/vulnerabilities.md>)

Tags: [cisco-sd-wan](<https://devfeed.tech/tags/cisco-sd-wan.md>), [cryptographic](<https://devfeed.tech/tags/cryptographic.md>), [cryptography](<https://devfeed.tech/tags/cryptography.md>), [infrastructure](<https://devfeed.tech/tags/infrastructure.md>), [network-security](<https://devfeed.tech/tags/network-security.md>), [networks](<https://devfeed.tech/tags/networks.md>), [post-quantum](<https://devfeed.tech/tags/post-quantum.md>), [quantum-computing](<https://devfeed.tech/tags/quantum-computing.md>), [sd-wan-security](<https://devfeed.tech/tags/sd-wan-security.md>), [security](<https://devfeed.tech/tags/security.md>), [security-for-ai](<https://devfeed.tech/tags/security-for-ai.md>)

### AI overview

The article explains why crypto agility is essential for long-lived network infrastructure adopting post-quantum cryptography. It argues that organizations should design systems to update cryptography continuously as standards, threats, and implementations evolve.

### Source excerpt

Learn why crypto agility is essential for PQC-ready networks--and how adaptable infrastructure helps organizations keep pace with evolving threats.