Abstract: Methods and devices for determining camera tampering are disclosed. In some aspects, a device includes one or more processors and a memory coupled to the one or more processors. The memory includes instructions that, when executed by the one or more processors, cause the device to determine a first sum vector of intensity values from a first image frame captured by a camera at a first time, determine a second sum vector of intensity values from a second image frame captured by the camera at a second time after the first time, compare the first sum vector to the second sum vector, and detect a tampering of the camera based on the comparison.