Support for RSA keys > 4096 bits

[Wiktor Kwapisiewicz]

Hi Nicolas,

There is also this site that may be of interest:

https://www.keylength.com/

As for your question, actually that was answered in GnuPG FAQ:

https://www.gnupg.org/faq/gnupg-faq.html#default_rsa2048

Kind regards,
Wiktor

On 07.11.2018 07:53, Nicholas Papadonis wrote:
> For those interested, link to the NIST document:
> 
> https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-57pt1r4.pdf
> 
> On Wed, Nov 7, 2018 at 1:50 AM Nicholas Papadonis
> <nick.papadonis.ml at gmail.com <mailto:nick.papadonis.ml at gmail.com>> wrote:
> 
>     I read in NIST 800-57 Part 1 Rev. 4 pg 53 that RSA keys length of
>     15360 bits is equivalent to a 256 bit AES symmetric key.  I also
>     read in other documentation that NIST recommends such key lengths to
>     protect data beyond 2030.  As email may be retained for many years
>     it would seem appropriate to secure such communications with a
>     larger key.
> 
>     Does this data agree with security experts?  Is there a reason why
>     GnuPG limits RSA key length to 4096 bits?
> 
>     Thank you,
>     Nicholas
> 
> 
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