Intimate-image theft is the unauthorized collection or copying of private sexual or nude photos from an account, phone, cloud backup, or other device. It can happen after an attacker guesses or steals credentials, abuses a recovery channel, or gains physical access to a device. The core harm is not just privacy loss: once images are copied, they can be saved, forwarded, or used for extortion.
In cyber security, this term matters because a simple account compromise can become a serious personal-security incident. Defensive controls such as strong unique passwords, multi-factor authentication, device locking, encrypted backups, and careful protection of email and phone recovery paths reduce the chance of exposure. For defenders, detecting unusual logins, mass downloads, or new forwarding rules can help spot theft early. For victims, revoking sessions and changing credentials may stop further access, but it cannot always recover copied files.