gpg key generation options

[Francesco Savino]

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I have installed gpg version 1.4.10 , the last I think.
When I run --gen-key the menù display 4 voices while the guide and
manual saw on gpg web page show only 3 voices.
Maybe the online documentation is out of date ?
My final problem is to get an explanation of fourth voice RSA and RSA
, why I can't encrypt a file with a key pair generated with this option ?

thanks
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