Me again.. [ Sorry if this post is more about cryptography in general than about cryptoPP ; just let me know if I'm really out of the scope of this mailing-list. ]
I would like to perform a selective signature (based on RSA) on a file made of distinct blocks. The aim would be to sign some blocks, but not all of them. My knowledge of signature techniques being quiet limited, I'm looking for methods that would allow me to do so. I'm not aware of any algorithm doing so. If I'm not wrong, the three RSA signature schemes defined in PKCS #1 v2.0 only work on single blocks. Among the things I thought of : - putting the selected blocks together as a simple file and signing the result : this is not really satifying since the order of the blocks should not matter - signing each block separately, and XOR-ing each of the signatures I get. I would be really grateful for any opinions about those ideas, or any better one. Regards, -- C�dric Mallet
