Krupuk (javanese), kerupuk (indonesian), keropok (malay), kroepoek (dutch) or kropek (tagalog) is a cracker made from starch or animal skin and other ingredients that serve as flavouring. most krupuk are deep fried, while some others are grilled or hot sand fried. they are a popular snack in maritime southeast asia (indonesia, singapore, malaysia, brunei, and philippines), and is most closely associated with the culinary traditions of indonesia, in particular javanese cuisine. it is an ubiquitous staple in its country of origin, and has spread to other countries either via the migration of diaspora populations or exports.

Source: Wikipedia