Re: encrypting modem links
I'm wondering if there is a way to do this with PCs? Yes, with difficulty, and not transparently.
Is there a way to encrypt a remote users entire connection with the BBS, so that they would have to have a special term program to access the system?
For PC's, replacing the terminal software is really the best way. There is no effective abstraction of serial port hardware in the PC world. The int 0x14 driver in the BIOS was rampantly defective, and MSDOS does not provide a standard interface.
Or, we could impliment an "external protocal" like zmodem. This would simply take keystrokes, buffer them, then encrypt/decrypt them. Make the source portable, and obtainable.
-----BEGIN PGP SIGNED MESSAGE-----
Or, we could impliment an "external protocal" like zmodem. This would simply take keystrokes, buffer them, then encrypt/decrypt them.
Make the source portable, and obtainable.
I'm doing something like this for my Thesis (i.e., wait a couple of weeks.. ;-) It's based upon Kerberos, but it will securely get you a TGT on a server machine that is on the Internet from a client terminal that is dialled up to it... Moreover, you can extract the session key from the protocol, which would allow for DES encryption of the session. While I haven't yet implemented the encryption of the session, I have been able to obtain kerberos tickets securely.... More info on request, or you can wait to read my thesis when it's done... Enjoy! - -derek PGP 2 key available upon request on the key-server: pgp-public-keys@toxicwaste.mit.edu - -- Derek Atkins, MIT '93, Electrical Engineering and Computer Science Secretary, MIT Student Information Processing Board (SIPB) MIT Media Laboratory, Speech Research Group warlord@MIT.EDU PP-ASEL N1NWH -----BEGIN PGP SIGNATURE----- Version: 2.2 iQBuAgUBK8NMvzh0K1zBsGrxAQFQwwLECieud4DvqHhkxsjwmrHt4Unpq2eR9hlT DKuKF2CqCfYVabks11r7TaZvrsSQ9Vs5zZFbXhfihaiQywTpdj2Bp8aSo0B+7paR ukzbY3GT1RLcSRrK+6KjPGw= =lzg8 -----END PGP SIGNATURE-----
participants (2)
-
Derek Atkins -
J. Michael Diehl