A security cable, comprising: a cable (210, 410, 610, 710, 810, 910, 1010) including: a plastically-deformable central core (226, 426, 616) having shape retention characteristics; a plurality of wire groups (225, 425, 617) positioned about the central core (226, 426, 616), wherein each of the wire groups (225, 425, 617) includes a plurality of wires; and a flexible outer coating (222, 422, 614) surrounding the central core (226, 426, 616) and the plurality of wire groups (225, 425, 617); and a coupling mechanism (720, 820, 920, 1020) attached to first and second ends (712, 812, 912, 1012) of the cable (210, 410, 610, 710, 810, 910, 1010) and structured to selectively couple the first and second ends (712, 812, 912, 1012) of the cable (210, 410, 610, 710, 810, 910, 1010) to one another, the coupling mechanism (720, 820, 920, 1020) including a lock (722, 824, 924, 1024); and wherein the cable (210, 410, 610, 710, 810, 910, 1010) is manually deformable to a plurality of shapes, characterized in that the central core (226, 426, 616) is structured to substantially retain the cable (210, 410, 610, 710, 810, 910, 1010) in each of the plurality of shapes, the security cable having a manually deformed state defining one of the plurality of shapes, and the central core (226, 426, 616) structured to substantially retain the shape-retaining security cable in the manually deformed state. a cable (210, 410, 610, 710, 810, 910, 1010) including: a plastically-deformable central core (226, 426, 616) having shape retention characteristics; a plurality of wire groups (225, 425, 617) positioned about the central core (226, 426, 616), wherein each of the wire groups (225, 425, 617) includes a plurality of wires; and a flexible outer coating (222, 422, 614) surrounding the central core (226, 426, 616) and the plurality of wire groups (225, 425, 617); and a coupling mechanism (720, 820, 920, 1020) attached to first and second ends (712, 812, 912, 1012) of the cable (210, 410, 610, 710, 810, 910, 1010) and structured to selectively couple the first and second ends (712, 812, 912, 1012) of the cable (210, 410, 610, 710, 810, 910, 1010) to one another, the coupling mechanism (720, 820, 920, 1020) including a lock (722, 824, 924, 1024); and wherein the cable (210, 410, 610, 710, 810, 910, 1010) is manually deformable to a plurality of shapes, characterized in that the central core (226, 426, 616) is structured to substantially retain the cable (210, 410, 610, 710, 810, 910, 1010) in each of the plurality of shapes, the security cable having a manually deformed state defining one of the plurality of shapes, and the central core (226, 426, 616) structured to substantially retain the shape-retaining security cable in the manually deformed state. a plastically-deformable central core (226, 426, 616) having shape retention characteristics; a plurality of wire groups (225, 425, 617) positioned about the central core (226, 426, 616), wherein each of the wire groups (225, 425, 617) includes a plurality of wires; and a flexible outer coating (222, 422, 614) surrounding the central core (226, 426, 616) and the plurality of wire groups (225, 425, 617); and a coupling mechanism (720, 820, 920, 1020) attached to first and second ends (712, 812, 912, 1012) of the cable (210, 410, 610, 710, 810, 910, 1010) and structured to selectively couple the first and second ends (712, 812, 912, 1012) of the cable (210, 410, 610, 710, 810, 910, 1010) to one another, the coupling mechanism (720, 820, 920, 1020) including a lock (722, 824, 924, 1024); and