# Locked Shields 2025 Event Report

DevFeed: [Locked Shields 2025 Event Report](<https://devfeed.tech/articles/locked-shields-2025-event-report-56761.md>)

Original publisher: [Read original article](<https://engineering.mercari.com/en/blog/entry/20250728-ceec77c0d4/>)

Author: Sana

Published: 2025-07-29T10:00:21Z

Content type: article

Language: en

Sources: [Mercari Engineering](<https://devfeed.tech/sources/mercari-engineering.md>)

Topics: [Security](<https://devfeed.tech/topics/security.md>), [Security Attacks](<https://devfeed.tech/topics/security-attacks.md>), [Cybersecurity](<https://devfeed.tech/topics/cybersecurity.md>), [Vulnerabilities](<https://devfeed.tech/topics/vulnerabilities.md>), [Hacking](<https://devfeed.tech/topics/hacking.md>), [Web](<https://devfeed.tech/topics/web.md>), [container](<https://devfeed.tech/topics/container.md>), [Deployment](<https://devfeed.tech/topics/deployment.md>), [Artificial Intelligence](<https://devfeed.tech/topics/ai.md>)

Tags: [2025](<https://devfeed.tech/tags/2025.md>), [authentication](<https://devfeed.tech/tags/authentication.md>), [container](<https://devfeed.tech/tags/container.md>), [cyber-attacks](<https://devfeed.tech/tags/cyber-attacks.md>), [cyber-defense](<https://devfeed.tech/tags/cyber-defense.md>), [deployment](<https://devfeed.tech/tags/deployment.md>), [event](<https://devfeed.tech/tags/event.md>), [infrastructure](<https://devfeed.tech/tags/infrastructure.md>), [networks](<https://devfeed.tech/tags/networks.md>), [report](<https://devfeed.tech/tags/report.md>), [security](<https://devfeed.tech/tags/security.md>), [vulnerabilities](<https://devfeed.tech/tags/vulnerabilities.md>), [web](<https://devfeed.tech/tags/web.md>)

## AI overview

Mercari employees report on participating in Locked Shields 2025, an international cyber defense exercise involving the protection of large-scale ICT infrastructure. They describe automated system checks, vulnerability remediation, attack detection and containment, web application hardening, and secure container deployment.

## Source excerpt

Introduction Locked Shields 2025, the world's largest cyber defense exercise, was held in early May by the NATO Cooperative Cyber Defence Centre of Excellence (CCDCOE). In the 2025 edition of this event, about 4,000 people from approximately 40 countries formed 17 multinational blue teams to participate in a scenario where they had to defend ICT [...]