Home     Contact     Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science     RSS     Terms of services     Privacy policy  
 Home      Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science   

<< Back to INDEX

Playing with eTokens [Hack]
posted October 16 2013 7:18.59 by spic0m

Most of us have seen theses OTP/eToken devices around. They are cheap, plentiful, easily available on eBay, and actually somewhat useful. The theory of operation for these is relatively simple and well-understood. The two main varieties are time-based tokens and event-based tokens. Time-based tokens are usually the ones that always have the display on and generate a new passcode every minute or so. Event-based ones are the kind that generate a new passcode when the user presses a button, and after that go back to sleep. These are the ones that usually do not have their screen on at all times. The actual codes are usually generated by hashing a secret key and a counter together. The particular token displayed (Aladdin PASS) uses SHA1 and is event-based.

[Link: dmitry]

You might also like...

GPS for Graphing Calculators [Project]

The Math Hidden in Futurama [Video]

Peltier Module Cooling - The Peltier Effect [Science]

A global look at personal income taxes [Infographic]

First laser-driven electron accelerator demonstrated [Science]

Climate Change Impact: NASA's 21st Century Predictions [News]

Arduino Tutorials - the AREF pin [Tutorial]

Will This Go Faster Than Light? [Education]

<< Back to INDEX



  Email (shall not be published)


Notify me of new posts via email

Write your comments below:
BEFORE you post a comment:You are welcome to comment for corrections and suggestions on this page. But if you have questions please use the forum instead to post it. Thank you.


No comment yet...

Be the first to comment on this page!

 Contact     Forum     Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science     RSS   

Site design: Giorgos Lazaridis
© Copyright 2008
Please read the Terms of services and the Privacy policy