From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jim Choate To: 9fans@cse.psu.edu Subject: Re: [9fans] secret stuff In-Reply-To: <36cecabb67b6c8621de499a79aba4519@plan9.bell-labs.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Date: Sat, 15 Jun 2002 11:32:15 -0500 Topicbox-Message-UUID: aec5a32e-eaca-11e9-9e20-41e7f4b1d025 On Sat, 15 Jun 2002 presotto@plan9.bell-labs.com wrote: > That's not really true. We've had numerous smart cards come through with > tamper protection. You couldn't get at the image without tearing it > apart, filing down the chips, and probing the memory physicaly. IBM > made that even hard to do. Certainly not something you did in 10 > minutes. There are a variety of ways to get to the data on the card. There is even a 'strobe attack' whereby one can flash extremely bright light on the card. You can 'jitter' the power supply and clocks, etc. The 'tamper proof' mechanisms are there to prevent PHYSICAL attacks only. There are other attacks. ps I work for IBM. -- ____________________________________________________________________ When I die, I would like to be born again as me. Hugh Hefner ravage@ssz.com www.ssz.com jchoate@open-forge.org www.open-forge.org --------------------------------------------------------------------