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I'm not sure about the format of writable CD-ROMs; but with other write-only media the default state of a bit is X and you write by changing some of the bits to Y. This being the case, you could conceivably zap part of the disk by writting them as all Ys. This would require everyone to have a CD-ROM writer not just a reader. Another problem is even if the media itself has this capability the standard writer devices are going to want to write block checksums etc.; which is probably going to fail.
Right, but as the price drops more people will be able to afford one? I would sure be willing to spend a few hundred on a CD-ROM writer (that's how much the readers cost now, right?) in order to make/destroy OTPs. (And by the time the price *does* go down that far, I should have the money to buy it, hopefully.) On checksums-- I wouldn't know how the devices work, but that looks like a task for a talented cypherpunks hardware hacker. -----BEGIN PGP SIGNATURE----- Version: 2.3a iQCVAgUBLQtWpXi7eNFdXppdAQELCQP8CR73zD0OLf6cmmGz+eAk19WkDw+lMmK3 WAoHpa1exR/LWvP9sWycxbshVuqIRDPfA+exM6gqzuuMxdfTIS/OiocTlKHy7+oW /OY+drLhMIS+W6w66r44LgPzk3cquRMEtkZVHoFTXdNb6qlL1DxjWRbKs6xkEs/V KMhCDLPqH2U= =WhDM -----END PGP SIGNATURE-----