noun
tailgating; piggybacking through a locked door
Refers to the act of following someone through a secured door or gate without authorization, often in the context of building security or access control.
オフィスビルでは共連れによる不正入室が問題になっている。
Unauthorized entry by tailgating has become a problem in office buildings.
セキュリティゲートで共連れを防ぐために、一人ずつ通るようにしてください。
To prevent tailgating at the security gate, please go through one at a time.
A loanword from English 'piggybacking', often used in IT/security contexts with a broader meaning including network access; 共連れ specifically refers to physical tailgating through a door.
Compound of 共 (tomo, 'together') and 連れ (tsure, 'companion'), with rendaku voicing. The exact origin is uncertain, but it likely emerged in modern security contexts.