Is Crypt::CBC with the Crypt::Blowfish algorithm safe for encrypting many plain text values with a single key value? I'm encrypting e-mail addresses for this application but don't know whether I'm doing things correctly or not. I recall hearing that it isn't safe to use the same key for multiple plaintexts with Crypt::RC4. So I'm just checking first.

# $self is a CGI::Application object
my $encrypted = encrypt_address(
    address => $address,
    key     => $self -> param('encryption_key'),
    cipher  => $self -> param('encryption_cipher') );

....

sub encrypt_address {
    my %arg = @_;

    require Crypt::CBC;
    Crypt::CBC -> new(
        { key    => $arg{key},
          cipher => $arg{cipher} } )

        -> encrypt_hex( $arg{address} );
}

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In reply to Safe symmetric encryption - Crypt::CBC + Crypt::Blowfish? by diotalevi

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