'Symmetric encryption - options?'

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List:       gnupg-users
Subject:    Symmetric encryption - options?
From:       "jpemail2001-321 () yahoo ! com" <jpemail2001-321 () yahoo ! com>
Date:       2012-03-13 9:01:27
Message-ID: 1331629287.47282.YahooMailNeo () web24711 ! mail ! ird ! yahoo ! com
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Hello,

I´ve encrypted some text to try out the passphrase-only encryption.

I´ve got this "error" after decryting the message although the message was decrypted correctly.

-------------------------------------------------------------------------------------

C:\gnupg>gpg --decrypt doc.gpg

gpg: CAST5 encrypted data
gpg: encrypted with 1 passphrase
Test message
gpg: WARNING: message was not integrity protected
-------------------------------------------------------------------------------------

What does mean CAST5 and is it a safe alghorithmus? Why not RSA?
Can I set more than one passphrase?
And why was the message not integrity protected and how to protect it?
thanks

[Attachment #5 (text/html)]

<html><body><div style="color:#000; background-color:#fff; font-family:arial, \
helvetica, sans-serif;font-size:10pt"><div>Hello,</div><div><br></div><div>I´ve \
encrypted some text to try out the passphrase-only \
encryption.</div><div><br></div><div>I´ve got this "error" after decryting the \
message although the message was decrypted \
correctly.<br></div><div><br></div><div>-------------------------------------------------------------------------------------<br></div><div>C:\gnupg&gt;gpg \
--decrypt doc.gpg</div><div><br>gpg: CAST5 encrypted data<br>gpg: encrypted with 1 \
passphrase<br>Test message<br>gpg: WARNING: message was not integrity \
protected<br>-------------------------------------------------------------------------------------<br></div><div><br></div><div>What \
does mean CAST5 and is it a safe alghorithmus? Why not RSA?</div><div>Can I set more \
than one passphrase?</div><div>And why was the message not integrity protected and \
how to protect  it?</div><br>thanks</div></body></html>

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