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| Since only a few bits of the token change from each... https://forum.yubico.com/viewtopic.php?f=4&t=43 |
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| Author: | hrag [ Wed May 14, 2008 7:56 pm ] |
| Post subject: | Since only a few bits of the token change from each... |
Q: Since only a few bits of the token change from each authentication request - Could and an attacker could guess some of the plaintext if they knew the approximate current sequence number? A: We have a 16-bit random number and and a 16-bit CRC together with the counter- and timer fields. So there is a bit more stocastic means than just the counters themseleves. We have been thinking of increasing the random part to make the string less deterministic. It would be a very simple thing to do. |
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