Re: Re: Encryption and advancement of AI and even more tools to come.

On 30.05.26 14:37, Philipp Ludwig wrote:
> On 5/30/26 13:59, Dale wrote:
>> Speaking of key sizes.  I'm thinking this is the number after the -s 
>> option on cryptsetup.  Mine is set to 512.  Is that high enough or 
>> should one think on using higher numbers, like 1024 or something? Is 
>> there a cost to higher numbers, requires more CPU or memory to 
>> perform the decryption? Mostly just curious.
> I don't know about LUKS, but for SSH the general consensus is that
> key size does not really matter _if_ you use elliptic curves.
> That is why I always use `ssh-keygen -t ed25519`. However, for more than
> 10 years know ed25519 is *still* not supported with Windows, which
> means if you rely on your key being usable on Windows, you will
> need to use the default RSA and in this case, key size still matters.

Windows 11 brings along "OpenSSH_for_Windows_9.5p2, LibreSSL 3.8.2"
and its ssh-keygen can create the "usual" keys including ed25519:

usage: ssh-keygen [-q] [-a rounds] [-b bits] [-C comment] [-f 
output_keyfile]
                   [-m format] [-N new_passphrase] [-O option]
                   [-t dsa | ecdsa | ecdsa-sk | ed25519 | ed25519-sk | rsa]
                   [-w provider] [-Z cipher]

IIRC that was also possible with at least some versions of Win10, after 
MS started
including OpenSSH with it.

Have a good weekend,
s.