A security device for luggage, which security device comprises: (i) attachment means for attaching the security device to hand grip means on the luggage; (ii) memory means containing: (a) first contents data of an X-ray of the contents of the luggage at a time of a first departure; (b) second contents data of an X-ray of the contents of the luggage at a time of a second departure; (c) first weight data of the weight of the luggage at the time of the first departure; (d) second weight data of the weight of the luggage at the time of the second departure; and (iii) global positioning system means for enabling the establishment of the position of the luggage, and the security device being such that: (iv) the attachment means is constructed to go around the hand grip means and to remain permanently on the hand grip means; (v) the first departure is a departure from a first departure point for a first journey, and the second departure is a departure from a departure point for a second journey; (vi) the first contents data and the second contents data are for being compared in order to conduct a security check for anomalies between the contents of the luggage at the time of the first departure and the contents of the luggage at the time of the second departure; (vii) the first weight data and the second weight data are for being compared in order to conduct a security check for anomalies between the weight of the luggage at the time of the first departure and the weight of the luggage at the time of the second departure; and (viii) the global positioning system means enables the position of the luggage always to be established. (i) attachment means for attaching the security device to hand grip means on the luggage; (ii) memory means containing: (a) first contents data of an X-ray of the contents of the luggage at a time of a first departure; (b) second contents data of an X-ray of the contents of the luggage at a time of a second departure; (c) first weight data of the weight of the luggage at the time of the first departure; (d) second weight data of the weight of the luggage at the time of the second departure; and (a) first contents data of an X-ray of the contents of the luggage at a time of a first departure; (b) second contents data of an X-ray of the contents of the luggage at a time of a second departure; (c) first weight data of the weight of the luggage at the time of the first departure; (d) second weight data of the weight of the luggage at the time of the second departure; and (iii) global positioning system means for enabling the establishment of the position of the luggage, and the security device being such that: (iv) the attachment means is constructed to go around the hand grip means and to remain permanently on the hand grip means; (v) the first departure is a departure from a first departure point for a first journey, and the second departure is a departure from a departure point for a second journey; (vi) the first contents data and the second contents data are for being compared in order to conduct a security check for anomalies between the contents of the luggage at the time of the first departure and the contents of the luggage at the time of the second departure; (vii) the first weight data and the second weight data are for being compared in order to conduct a security check for anomalies between the weight of the luggage at the time of the first departure and the weight of the luggage at the time of the second departure; and (viii) the global positioning system means enables the position of the luggage always to be established.