'Re: Symmetric encryption - options?'

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List:       gnupg-users
Subject:    Re: Symmetric encryption - options?
From:       "jpemail2001-321 () yahoo ! com" <jpemail2001-321 () yahoo ! com>
Date:       2012-03-13 14:02:28
Message-ID: 1331647348.88654.YahooMailNeo () web24701 ! mail ! ird ! yahoo ! com
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> It isn't RSA because this is symmetric encryption.  CAST5 is a 128-bit block \
> cypher.
So its not really safe, is it?

@Robert 

> If you choose to use someone's public certificate to encrypt a message,
> they use the private part of that certificate to decrypt it -- different
> things for encryption and decryption, thus a different kind of
> algorithm, an asymmetric one, is used.So you would suggest, to use RSA? I think so \
> because it seems to be stronger encryption.

The problem is I need to encrypt a message but I dont know the recipient yet. So I \
considered a passphrase method. Cause he dont need to send me his public key (if he \
has any). 

But.... OK I will try to encrypt the message with a new created private key \
(specially created for the recipient) which I will send later to him, so he will be \
able to decrypt the message. A bit complicated but possible, I think!? ^^

[Attachment #5 (text/html)]

<html><body><div style="color:#000; background-color:#fff; font-family:arial, \
helvetica, sans-serif;font-size:10pt"><div style="font-family: arial, helvetica, \
sans-serif; font-size: 10pt;"><div style="font-family: times new roman, new york, \
times, serif; font-size: 12pt;"><div id="yiv1113227165"> <div>&gt;It isn't RSA \
because this is symmetric encryption.&nbsp; CAST5 is a 128-bit block \
cypher.</div><br>So its not really safe, is it?<br><br>@Robert <br><pre>&gt;If you \
choose to use someone's public certificate to encrypt a message, &gt;they use the \
private part of that certificate to decrypt it -- different &gt;things for encryption \
and decryption, thus a different kind of &gt;algorithm, an asymmetric one, is \
used.</pre>So you would suggest, to use RSA? I think so because it seems to be \
stronger encryption.<br><br>The problem is I need to encrypt a message but I dont \
know the recipient yet. So I considered a passphrase method.<br>Cause he dont need to \
send me his public key (if he has any). <br><br>But.... OK I will try to encrypt the \
message with a new created private key (specially created for the recipient) which I \
will send later to him, so he will be able to decrypt the message. A bit complicated \
but possible, I think!? ^^<br><br><br></div><br> </div> </div>  </div></body></html>

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