-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 El 17-06-2015 a las 11:15, Robert J. Hansen escribió: ... > The most common one I've found is not understanding the material as > well as they think. This tends to come through most in the > metaphors an instructor uses. For instance, I frequently encounter > instructors who tell the class to imagine a lock with two keys, one > that locks it and one that unlocks it, and they proceed to use that > lock metaphor to explain crypto. > > It's absurd. Who in the class has ever seen a lock with two keys, > one that locks it and one that unlocks? The metaphor's ridiculous: > the locks the students are familiar with require *no* keys to lock > and only one key to unlock.
I remember a tutorial that compared it to a lock and 1 key. I keep the key, and send the lock to the person that will send messages to me. The person writes the message, put it in a box, and locks the box with the lock. I think that is very accurate, because I can encrypt messages to your public key, even if I don't have a key of my own (of course, in that case I can't sign the message, but that is a different operation). Maybe the magical wax could be useful to explain signatures? Or... I can send you a sample of my DNA. Then I write a message, and sign it using my blood as ink (ouch!), you get the message, run a DNA test... The only way somebody can fake my signature would involve stealing a sample of my blood, but then, it would be like stealing my private key. Best Regards -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBCAAGBQJVg23fAAoJEMV4f6PvczxAhWkH/2oOKNgGU76BEf4Mo4xNZOIJ n/tVzzIRX5Oygjk//RRe9qwWCXSAU7CCOuqqy2xDyHcrVCxgI1lwhd6KBFx6uNOe g1xSkhHRDyJxd/67etgo0BaV4g0MrB0/LZHp5LXxUDXJjWOg3zpdS8X+TECIh2TA pFyfr+aL2Tu0BhylcOoZYvK7WDp7QCDgAW+jOHciwvTK3WfY1ArXrJ8dTxPNT1qn VlpgxrzbVoyZ/hD707qMdvjYjf9vUI5DNBZ6vPVcHBFIcwMsjzWSzeZHwSx8nbu2 zD7Z1UyvIBHN5cyProuBQJFmiIbzyNZ+m5R5kSSQZzX+rkA9g7tkQSla1Rr+PYo= =usmm -----END PGP SIGNATURE----- _______________________________________________ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
