Why a subkey?

Mike - EMAIL IGNORED m_d_berger_1900 at yahoo.com
Sat Feb 24 18:49:17 CET 2007

On FC4 with gpg 1.4.1:

I created a new user account and used gpg --gen-key .
I selected RSA (sign only) since it was the only RSA

It says the key cannot be used for encryption, and a
subkey must be generated. Why?  Is it related to
(sign only)?  If so, why was (sign and encrypt)
not offered as an option?

I did this a year or two ago, and I do not remember
needing a subkey.  I still have that keyring in
under another user.

Thanks for your help.

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