Upskirting or upskirt photography is the practice of taking photographs under a person's skirt or kilt, capturing an image of the crotch area, underwear, and sometimes genitalia. An "upskirt" is a photograph, video, or illustration which incorporates such an image, although the term may also be used to refer to the area of the body inside a skirt, usually from below and while being worn.

Secret photography is the use of an image or video recording device to photograph or film a person who is unaware that they are being intentionally photographed or filmed. It is sometimes called covert photography.