public-key encryption of very small payload

[Jens Peter Secher]

I have to encrypt a very small payload (< 64 bits) with an asymmetric
scheme.  The total ciphertext must be less than 200 bits.  Efficiency is
irrellevant.  What is the best non-patented way of doing this?

[If this is in a FAQ somewehere, I'm sorry, I couldn't find it]

Thanks in advance,
-- 
                                                      Jens Peter Secher
 _jpsecher get2net dk DD6A 05B0 174E BFB2 D4D9 B52E 0EE5 978A FE63 E8A1_