Endpoint Encryption

I am Having a problem trying to decrypt a share.

I get the message

This object was encrypted to the following public key(s):

1 unknown key(s)

It is not possible to decrypt this message becasue your keyring does not cntain usable private key(s) correcponding to any of the above public key(s).

I know the Key Id for this key. But I cannot find the key any where. Even when I search for the key on pgp it cannot find the key.

Maybe you should check with the person who split the key to see if you were suppose to have a share of it.

Do you mean instead mean to be referring to an encrypted file.  If so, this would usually mean that the file was not actually encrypted to your key.

The problem is.there is only three of us with pgp on one else and none of us have the key. I have checked the Key ID to all of our keys and none of our keys match.

Please clarify if you are referring to a split key that you are trying to unite, or if this is in regards to a file or message that you cannot decrypt.  If it is a file or email, it would just mean  that someone didn't encrypt to your key.

My problem is we use netshare on a server.  we encrypted all of these shares ont he serving using the servers key. Then we added access to the netshares for the three useres. All was working fine until one of us reinstalled windows and did not save their old key. So they generated a new key. Then we started having share problems so they deleted their new key that was created and found their old key. So what i think is some how some of the files were encrypted to the new key but we no longer have that key. So what can we do I have the Key ID that is need but none of our keys that we have match the KEY ID of the required.

Files placed in a NetShare protected folder should be encrypted to all of the public keys of the users who have been granted access to the folder (each should be able to use their private key to access the symmetric key needed to decrypt and use the files).  It sounds like those files none of you can decrypt may be ones that were encrypted to some other key and placed there by a non authorized user; if this is the case, they would not have been encrypted to the NetShare folder's symmetric key and none of you should be able to decrypt them.  Could this be what is happening?

There are only 4 installations of PGP in the office us three and the server so I'm not sure how an unauthorized user would have gotten there. Is there a fail safe that PGP has to decrypt files of a lost key? 

I was thinkng that it might be something the user with the key problem may have done. 

If these are files encrypted directly to a public key instead of to the NetShare symmetric key, there is no way to decrypt them without having the corresponding private key.