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Barry Yuan

Principal Solutions Engineer

Cisco Global Partner Sales

Barry Yuan is a Principal Solutions Engineer at Cisco, an inventor with many patents, as well as a Cisco Live Distinguished Speaker. He brings 25 years of experience in cybersecurity and network architecture, design, and implementation. His career spans technology vendors, the public sector, and service providers, giving him a broad perspective on how technology, regulation, and operational realities intersect. He has maintained two CCIE certifications for 23 years and holds additional industry credentials spanning cybersecurity, project management, and software development, including recognition in the DevNet 500

Articles

Secure Claude Enterprise with Cisco AI Defense

3 min read

Teams are putting Claude Enterprise to work fast, and not just for chat. Claude, Claude Code, and Claude Cowork act on behalf of users. They read documents, call tools, and run tasks. That makes the prompt an attack surface. A jailbreak can try to..

Try Cisco AI Defense Explorer Edition in this hands-on lab

3 min read

A practical DevNet lab for connecting a public OpenAI-compatible target to Cisco AI Defense Explorer, running a Quick Scan, and reviewing AI red team findings.

Protecting Agents with Cisco AI Defense and Google Agent Development Kit

5 min read

Agents are powerful because they do more than answer questions. They call tools, retrieve context, and act across multiple steps. That is what makes frameworks like Google Agent Development Kit (ADK) so useful, and it is also what changes......

March 31, 2026

DEVELOPER

Don’t deploy OpenClaw without securing it – Try this opensource solution and hands-on lab

3 min read

OpenClaw enables powerful AI agent workflows—but introduces new security risks. Learn why securing tools, MCP servers, and agent-generated code is critical, and how DefenseClaw helps protect your environment.

March 27, 2026

DEVELOPER

Bringing AI to DevNet Learning Labs

3 min read

Start a Learning Lab, get instant LLM access. No provider signups, no LLM configuration—just open the terminal and the model is ready. AI Defense, MCP Security, A2A Protocol, and Skill Security labs are live now, with more AI-powered labs coming.

A Developer’s First 10 Minutes: Secure a LangChain Agent with Cisco AI Defense

3 min read

LangChain makes it easy to move from a working prototype to a useful agent in very little time. That is exactly why it has become such a common starting point for enterprise agent development.   Agents don’t just generate text. They call tools, retrieve data, and take actions. That means an agent can touch sensitive systems and real customer data within a single workflow.