The vendor can revoke his private/public key, generate a new
private/public key pair and - hopefully this time - publish only the
public key.
 
BTW I believe a public key can be associated with more than one PGP
private key, although doing so would still not explain the vendor's
publishing a private key that could decrypt his public key encrypted
data - regardless of how many other private keys could do so too.
 
Just my ha'penny.
 
Chris Poncelet (retired sysprog)


On 22/08/2019 20:41, Paul Gilmartin wrote:
> On Thu, 22 Aug 2019 14:13:58 -0500, Joel M Ivey wrote:
>
>> Thanks all for the response.   I'm glad I wasn't missing something.   I will 
>> discuss further with the vendor, hoping they will recognize the risks.
>>
> How can the vendor recover from this without causing great
> disruption, even an indefinite time in the future, to existing
> customers who are rely on the improperly distributed private key?
>
> -- gil
>
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