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| ECC key length? https://forum.yubico.com/viewtopic.php?f=35&t=2333 |
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| Author: | jcross [ Mon Jun 06, 2016 3:06 pm ] |
| Post subject: | ECC key length? |
Hello, On this page, Yubico indicates that the YubiKey 4 support up to 521 bit ECC: Quote: "The YubiKey 4 is a single-chip design without a Java Card/Global Platform environment, featuring RSA with key lengths up to 4096 bits and ECC up to 521 bits." But on this page it says 384. I am thinking that they both might be wrong as 512 seems much more likely. Which is it? Thanks. |
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| Author: | larryv [ Sat Jun 11, 2016 5:42 pm ] |
| Post subject: | Re: ECC key length? |
I can’t speak to which figure is correct, but “521” is probably not a typo. The NIST-recommended elliptic curve for 256-bit equivalent security is called P-521 and is based on a 521-bit prime. |
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| Author: | jcross [ Sat Jun 11, 2016 6:09 pm ] |
| Post subject: | Re: ECC key length? |
Thanks for pointing that out. Is this just for PIV or also OpenPGP keys that use ECC? |
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| Author: | larryv [ Tue Jun 14, 2016 10:02 pm ] |
| Post subject: | Re: ECC key length? |
Both PIV and OpenPGP use the NIST curves.
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| Author: | jcross [ Tue Jun 21, 2016 2:30 pm ] |
| Post subject: | Re: ECC key length? |
Quote: YubiKey 4 only supports RSA keys Thanks. That is unfortunate! |
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