Locked Shields
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{{short description |Cyber-defence exercise}}
Locked Shields is an annual cyber defence exercise organised by NATO's Cooperative Cyber Defence Centre of Excellence in Tallinn since 2010. The format is usually that a red team simulates a hostile attack while blue teams from the participating nations simulate their coordination and defence against this.{{r|Smeets}}
The performance of teams is assessed using a mix of automated and manual scoring.{{r|SCD}} In 2022, there were 24 teams with an average of 50 experts in each team.{{r|CCDCOE}} The team from Finland was declared as the 2022 winner for the excellence of their situation reporting and solid defence.{{r|HT}}
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