NRCocker
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 Dec 17 awarded Yearling Oct 10 comment Using C_Sign to create a PKCS7 signature Sure. You can use the crypto API, however be sure that you can make these work safely with PKCS#11, because Micro$oft are no famous for their interoperability. You could use the CAPI drivers instead of PKCS#11. Usually the CAPI layer sits over the top of PKCS#11 anyway. Oct 10 answered Using C_Sign to create a PKCS7 signature Jan 4 awarded Teacher Jan 2 asked How does Clifford Cocks 'Non-Secret Encryption' work? Dec 29 answered Algorithm: How to use x and y mouse movement co-ordinates to generate random data? Dec 17 awarded Student Dec 17 comment RSA exhibits symmetrical properties — is it possible to form a cryptanalytic attack? This is because all$C$values are$mod N$. As$C_s$is the symmetric partner of$C$the two added are N. E.G. If$P=11$and$Q=7$, then$N=77$. If$E=3$and$M=2$then$C=8$($2^3 mod 77 = 8$).$C_s = (N-M)^e mod N = (77-2)^3 mod 77 = 69$. This means$C + C_s = 8 + 69 = 77$. Also$M_s = N - M = 75$and therefore$|M_s - C_s| = |M - C| = |75 - 69| = |2 - 8| = 6\$. Dec 17 asked RSA exhibits symmetrical properties — is it possible to form a cryptanalytic attack?