PGP signed, encrypted messages

    % cat sample
    This is a sample.

    This is a sample text file.  I created it with an editor.  If it were
    an actual message, it would contain some useful information.

    This has been a sample.
    % pgp -seat sample john
    Pretty Good Privacy(tm) 2.6.2 - Public-key encryption for the masses.
    (c) 1990-1994 Philip Zimmermann, Phil's Pretty Good Software. 11 Oct 94
    Uses the RSAREF(tm) Toolkit, which is copyright RSA Data Security, Inc.
    Distributed by the Massachusetts Institute of Technology.
    Export of this software may be restricted by the U.S. government.
    Current time: 1996/11/09 13:12 GMT

    A secret key is required to make a signature. 
    You specified no user ID to select your secret key,
    so the default user ID and key will be the most recently
    added key on your secret keyring.

    You need a pass phrase to unlock your RSA secret key. 
    Key for user ID "Donald A Watrous <watrous@cs.rutgers.edu>"

    Enter pass phrase:  (does not echo) Pass phrase is good.  
    Key for user ID: Donald A Watrous <watrous@cs.rutgers.edu>
    1024-bit key, Key ID 85082CD5, created 1996/11/09
    Just a moment....

    Recipients' public key(s) will be used to encrypt. 
    Key for user ID: John E Doe <jd@somewhere.net>
    1024-bit key, Key ID F4DD25F1, created 1996/11/07
    .
    Transport armor file: sample.asc
    % cat sample.asc
    -----BEGIN PGP MESSAGE-----
    Version: 2.6.2

    hIwD1vwet/TdJfEBBADUFRZNPHORV8arhVNtdjvZxaVA3TttJn3pieWJqBck6xbl
    f4Kl0EBF8w64nr7tNZsoTasz2PsKXsNnbV4Vyfva/mWfUB9UKdHKhjM6qLmfvWJt
    CBs0FSb7P5y7VAR3dtcSRxVEy1kEObnWOO8xFodjbFcmrTKknEZMnMVSSuO0vKYA
    AAFBMmRW1YLPm3zftySCTaHbBSBfY7yEXB1SsMnBqMNR24FokTrFd6LjepbbeWMo
    TzdgBO8zmuF2xpIm9ham6LXyGTmiolLqsXA1Jux+j/eG6H3R/WZzyCjvwAeCzs0y
    vtwQH1DVjeDcK4SaXk+JhIJiPoWOyhUv5T2anvoPLhD4OLCM/xZ6C3r/0EN2W3Sd
    K8yIZL+qiFWxd6d4JWI4FE8lUmcxnF6u85ddbkpdPq6gbq2558L6Vxszg7hkRmE1
    d5oeRGqQaA0h0W0jKkjW8IVK9wMIaYNd6ZDg4q5MwPbqe5+QC2Ojeo3xOYYVu6Wy
    oP2FNnl2gKsxJEMfamnrT0BxZTT5at3wuT8sWP7MrtTKp/OzCD+87lFRbTFivH54
    Smb2GkgEVUd+aOQy/fTOw9R/QLaZs0ZWxo/DWhYpLNSyYGpX
    =x5z/
    -----END PGP MESSAGE-----
    %