Path: utzoo!attcan!uunet!husc6!mailrus!purdue!decwrl!ucbvax!SNYCENVM.BITNET!EPRF From: EPRF@SNYCENVM.BITNET (Peter Flass) Newsgroups: comp.os.vms Subject: Re: Software Protection Message-ID: <8807041734.AA23271@ucbvax.Berkeley.EDU> Date: 1 Jul 88 15:28:51 GMT References:Sender: usenet@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 27 > >a friend of mine has a problem with his software. He wants to protect it >against using without having his licence. > >There might be 3 ways for doing such a protection: > >- Reading the CPU identification and testing it in the program >- ... > >- How can we get the cpu identification (F$GETSYI("SID")??) from within > the program and is this a secure method? My experience has been that the SID register is *NOT* a constant, at least on the 750. We have had major problems with a purchased software package which tries to use it for protection. After several problems the vendor finally had to send us an unprotected version. -Pete +-----------------------------------------------------------------------------+ | | | PETER FLASS BITNET: EPRF@SNYCENVM (PREFERRED) | | Director of Computing Services INTERnet: ESCFLASS@UBVM.CC.BUFFALO.EDU | | SUNY Empire State College AT&Tnet: (518)587-2100 X350 | | 2 Union Avenue | | Saratoga Springs NY 12866 | | | +-----------------------------------------------------------------------------+