Protecting signing key

[S K]

Hi,

I plan to make myself a signing key and keep it
offline and as securely as possible. How do you guys
keep your signing key secure?

- Do you put it on a USB stick and encrypt the file
system?
- Do you use Knoppix MIB
(http://www.bouissou.net/knoppix-mib/doc-html/Knoppix-Mib.html)?
- Any other form of bootable USB based Linux system
that can support encrypted file systems, encrypted
swap etc.?

Thanks,
SK 

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