[tor-talk] Rendezvous RSA Exponent

[Nick Mathewson]

On Mon, Jul 14, 2014 at 12:05 PM, Tor Talker <tortalker at hidemeta.com> wrote:
> [I hope technical questions are appropriate here.  Please let me know if there is a better place for them.]
>
> Is it OK to use an public exponent other than 65537 in hidden service RSA keys?
>
> I've received reports that a couple of hidden servers using vanity rendezvous hostnames I made are unresponsive, even thought the server looks fine from the unencrypted internet.  In one case, a hidden service was (reportedly) unresponsive for 10 hours, but was back on line when I checked it.

Any RSA exponent that meets the regular security requirements for RSA
should work fine.  (This is not deliberate, but enough people have
generated vanity hostnames that we're allowing goofy exponents for
.onion domains.)

yrs,
-- 
Nick