hrdwr scrty mdl (HSM) s physcl cmptng dvc tht sfgrds nd mngs scrts (mst mprtntly dgtl kys), prfrms ncryptn nd dcryptn fnctns fr dgtl sgntrs, strng thntctn nd thr cryptgrphc fnctns. Ths mdls trdtnlly cm n th frm f plg-n crd r n xtrnl dvc tht ttchs drctly t cmptr r ntwrk srvr. hrdwr scrty mdl cntns n r mr scr cryptprcssr chps.