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Old 10-11-2007, 03:22 PM   #1
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gpg question

Is it possible for me to encrypt a message and have the recipients be everyone who has my public key instead of choosing who the recipients are?
Old 10-11-2007, 05:30 PM   #2
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No, for two simple reasons:

1.Everyone has (or can have) your public key,
2. The encryption is symmetric; two keys are used (your private key and the public key of the recipient).

If the recipient doesn't have a key, you can't encrypt using gpg. There are other encryption methods that only rely on a single key. They are less secure, but if that meets your needs then you should investigate them. For example:

To encrypt a file:
openssl des3 -salt -in infile.txt -out encryptedfile.txt
To decrypt the file:
openssl des3 -d -salt -in encryptedfile.txt -out normalfile.txt
You will be prompted for the password; you need to share that passord with the receiver. However, as with all single key encryption, anyone with the password can decrypt the file. Only the intended recipient can decrypt a gpg encrypted file.
Old 10-15-2007, 08:32 PM   #3
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Moved: This thread is more suitable in Linux -> Security and has been moved accordingly to help your thread/question get the exposure it deserves.


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