A linear scanner is a device or imaging method that captures a scene one narrow strip at a time, rather than taking a full-frame picture in a single exposure. The final image is built from those sequential slices, which makes the result dependent on motion, alignment, and timing.
In cyber security, linear scanners show up in document capture, ID verification, forensic imaging, and other workflows where a precise, inspectable record matters. Their strip-by-strip design can help defenders digitize badges, forms, or evidence, but it can also create weaknesses: motion can distort the image, stitching errors can reveal tampering, and attackers may exploit predictable scanning behavior to copy documents or bypass visual checks. Understanding how a linear scanner samples data helps analysts judge image reliability and spot manipulation.