Re: e$ as "travellers check?
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From: Jonathan Cooper <entropy@IntNet.net> Date: Monday, August 29, 1994 6:45PM
traveller's checks are an extremely easy way to defraud any bank that issues them, what will happen to this difficulty factor if they are anonymous ?
Digitally signed notes are not forgeable.
Right.
I doubt very seriously that there is anything on the planet that is *ABSOLUTELY* unforgable. It all comes down to how much energy and resources one is willing to sink into the project.
This comment, unless I misunderstand it, supports (rather than refutes) Perry's rebuttal to the claim that forging digital traveller's checks would be "extremely easy." Sticking in my nose where it doesn't belong, JD -----BEGIN PGP SIGNATURE----- Version: 2.6 iQCVAgUBLmJxiEGHwsdH+oN9AQFu3gP/c2toIn3PFVFREc/L3cNVlLuskLTAAwBW v7qjR3Lwc01vXgoze14uIxtkrSY9fIyXyZOyBqaOUGB1lJGlXpLjINjbBUIWa5QO h/SHkAc96FXVioYClXaBvPG2fn+mOy1/thIorvDCc3lcq9/es0oCDroAahgGgj5M DgHu4X+1+UQ= =E1Lt -----END PGP SIGNATURE-----
Digitally signed notes are not forgeable.
I doubt very seriously that there is anything on the planet that is *ABSOLUTELY* unforgable. It all comes down to how much energy and resources one is willing to sink into the project.
This comment, unless I misunderstand it, supports (rather than refutes) Perry's rebuttal to the claim that forging digital traveller's checks would be "extremely easy."
No - it just makes the point that there is almost nothing which is "not forgeable" with a suitable expenditure of effort & resources. -jon ( THEY CAN STOP THE PARTY, BUT THEY CAN'T STOP THE FUTURE ) ( --------------------[ entropy@intnet.net ]------------- )
Jonathan Cooper says:
No - it just makes the point that there is almost nothing which is "not forgeable" with a suitable expenditure of effort & resources.
That depends on definitions. For instance, if I say "without stealing a copy of our one-time pad, or using coercion on one or the other of us, it would be impossible to forge a message between myself and my correspondant who shares a one-time pad with me, given that we properly use the one-time pad only once", I'm being reasonably correct -- no amount of expenditure of resources will do better for you than a random guess. It isn't true that "anything can be done given enough effort". Some things cannot be done period, and some things cannot be done given that we live in a finite universe. Myself, I worry about the physical security of my keys a lot more than about someone factoring them in most instances. Perry
participants (3)
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John Douceur -
Jonathan Cooper -
Perry E. Metzger