- Important when you don't trust the computer you are using, such as a library computer or internet kiosk.
- Available by default in Free/Net/Open BSD.
- FreeBSD uses OPIE, Net/Open use S/Key.
- One time passwords are based on your pass phrase, a non-repeating sequence number, and a seed.
- Initial setup should be done directly on the server.
- "skeyinit" for Net/Open, "opiepasswd -c" for FreeBSD.
- Enter a pass phrase that is not your regular account password.
- Find your current sequence number and seed with "opieinfo" or "skeyinfo", for example: "497 pc5246".
- Generate a list of the next 10 passwords and write them down, using "opiekey -n 10 497 pc5246" or "skey -n 10 497 pc5246".
- When you log in from a remote machine that might have a keystroke logger, you can now use a one time password instead of your regular password.
- For OpenBSD, log in as account:skey, for example "bob:skey", which will cause the system to present the s/key challenge.
- For NetBSD, the system will always present you with the s/key challenge if it is configured for your account, although you can still use your regular password.
- FreeBSD by default will force you to use a one time password if it is configured for your account.
- If you want both OPIE and password authentication, FreeBSD allows you to list trusted networks or hosts in /etc/opieaccess.
- Instead of carrying a list of passwords around, you can use s/key generators on a portable device that you trust, such as a palm pilot.
- For more info, check the man pages.
Ogg Link:
https://archive.org/download/bsdtalk117/bsdtalk117.ogg
Instead of carrying a list of passwords around, you can use s/key generators on a portable device that you trust, such as a palm pilot.
ReplyDeleteI installed an OTP calculator on my mobile phone: jotp, the Java OTP Calculator.
What happened to the Ogg feed? Amarok complains about "invalid data" and if I click on the feed link in Firefox, it comes up empty... :(
ReplyDeleteThe ogg feed is hosted by a listener. Maybe his server is having problems.
ReplyDeletethanks alot for this. i always wondered about one time passwords but never took the time to look into it.
ReplyDeleteI discovered the other day that I can get this podcast through iTunes--very cool!
ReplyDeleteHowever, this episode didn't appear.
I tried downloading the mp3 and got...
Safari can’t connect to the server.
Safari can’t open the page “http://cisx1.uma.maine.edu/~wbackman/bsdtalk/bsdtalk117.mp3” because it could not connect to the server “cisx1.uma.maine.edu”.
Sorry. Server upgrades today, so the files might be unavailable for a bit.
ReplyDeleteDragonFly works like FreeBSD.
ReplyDeleteNeat, thanks :-) I didn't even know about OTP on BSD before this.
ReplyDeleteCould you please correct the URL to the Ogg in the Ogg feed ? In feed, it is stored as "http://www.example.com/none.ogg" . And also tonnes of thanks for producing such great stuff. I just found this today, and listened to no. of Oggs. Thanks :)
ReplyDeleteInstead of carrying a list of passwords around, you can use s/key generators on a portable device that you trust, such as a palm pilot.
ReplyDelete