[EMAIL PROTECTED] wrote: > Now I'd like to know how difficult it would be to get the symmetric > key without actually having the public key? > > Should I generate or modify the RSA key in some specific way to > make this more difficult?
It's not clear to me what the application is here. If you're planning to keep a public key private (secret) that's a clear indication that this is not an application for public key cryptography. With RSA you can envelope a key such that only the recipient can open it, and you can sign it or encrypt with your private key so that the recipient knows it's from you. It's possible that you might want to use passphrase based encryption (PKCS#5), or store the key in a PKCS#12 object. Start with the CryptoFAQ at RSA Labs... http://www.rsasecurity.com/rsalabs/faq/index.html ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]