securely

hello Guys.... I have some very sensitive data on my pen drive... And I want to delete it securely so no body can get it back...Is there anyway to delete data????/

hi all pls answer me, Can Dataone be shared securely? n how? i have to 2 computers n one BB connection .. can it be used simutaeneously without any hacking between 2 pcs ?? If yes then how ??? pls specify i mean i want a split up of 50-50 bandwitdh . and also if one pc is of then also...