Method of securing and screening luggage with dual-function locks that the TSA and similar luggage-screening entities can open to screen checked air travelers' luggage.

The present invention concerns a key housing, in particular for a motor vehicle key, comprising: a key (1) comprising an insert (5) and a key head (3) secured to said insert (5), a housing (7) comprising an insert housing (9) that is longitudinal in shape, intended to receive an insert (5), and a receiving space (70), said key head (3) forming a cover closing the housing (7) at said receiving space (70), and complementary reversible securing means carried by the housing (7) and by the key (1), allowing said key (1) to be locked onto and unlocked from the housing (7), the housing (7) comprising at least one elastic absorption means (11, 11) in contact with the key (1) in the locked position.

A key case having a housing comprising at least two walls forming a space for storing at least one key, the housing being provided with at least one locking mechanism to prevent the key from falling out of the housing. Also, a key head for storage in the housing, comprising either modified side walls of the key head securing the key head with a cap, or enclosing the key head in the housing. Also, a key box comprising at least two cases, a shell of which comprises at least two walls between which, or in at least one of which, a space is formed for storing at least one key, the case being provided with at least one locking device to prevent the key from falling out of the case, the at least two cases being connected to each other.