Symmetric encryption - options?

jpemail2001-321 at jpemail2001-321 at
Tue Mar 13 10:01:27 CET 2012


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?
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