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[REBOL] Re: RSA Encryption

From: mattsmac:hotmai:l at: 13-Nov-2003 10:34

And then I guess if there is ongoing communication, each side would need to have their own (different) private and public key?
>From: "Matt MacDonald" <[mattsmac--hotmail--com]> >Reply-To: [rebol-list--rebol--com] >To: [rebol-list--rebol--com] >Subject: [REBOL] Re: RSA Encryption >Date: Thu, 13 Nov 2003 10:20:09 -0500 > >Is it possible to encrypt binary files (pictures, pdfs etc) this way? or >only text files? >Matt >------------------------------------------------------ >On Thu, 13 Nov 2003 09:22:41 -0500, "Matt MacDonald" < >[mattsmac--hotmail--com]> said: > > >Can someone please explain to me, in as few mathematical equations as > >possible, why RSA public/private encryption works? The way it looks to >me > >in the documentation that came with REBOL, you have to send the recieving > >party the public key. If this is the case, what stops some hacker from > >intercepting that public key and using it to decrypt the data? How is >this > >any different from using a syncronous encryption method and then just > >sending the encryption key along with the data? It just doesn't make >sense > >to me. > >You misunderstood how it works. Let's suppose you (A) is trying to send >an encrypted text to a friend (B): > >(A) gets the public key associated with (B). >(A) encrypts the text to be sent using that key and send the encrypted >text to (B). >(B) will receive the encrypted text and uses his private key to decrypt >it. > >Note it is not possible to decrypt the text with just the public key, >so that's why a third person that somehow got the encrypted text would >not be able to decrypt it without knowing the private key from (B). > >If all you want to do iss sign adocument, then you use your private >lkey to sign it and anyway that knows your public key will be able to >verify if the text was changed or something like that. > >-Bruno > >_________________________________________________________________ >Compare high-speed Internet plans, starting at $26.95. > (Prices may vary by service area.) > >-- >To unsubscribe from this list, just send an email to >[rebol-request--rebol--com] with unsubscribe as the subject. >
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