Re: secure channel support via PACE

Jacob Bachmeyer via Gnupg-devel <[email protected]> Thu, 12 Feb 2026 21:52:23 -0600
Newsgroups gmane.comp.encryption.gpg.devel
Message-ID <[email protected]>
On 2/12/26 10:39, Mario Haustein via Gnupg-devel wrote:
> [...]
>
> [...] One just need to send an APDU to the card reader at the
> beginning to establish the secure channel or alternatively to send a cached
> card access number (CAN) to the reader so the reads skips querying it from the
> card holder. The latter method should be preferred as it is very annoying to
> enter the CAN every time. There is now drawback in caching a CAN.

Assuming you meant "no drawback", are you sure about that?  What if a 
cached CAN leaks somehow?  Could malware abuse a cached CAN to perform 
operations without the user's knowledge?


-- Jacob



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