<p><b>Important note re TLS:</b> Some servers that do not implement SSL correctly cannot negotiate the SSL handshake with client software (such as the browser) that supports TLS. Such servers are known as "TLS intolerant."
<p>When the Enable TLS option in the SSL preferences panel is selected, the browser attempts to use the TLS protocol when making secure connections with a server. If that connection fails because the server is TLS intolerant, the browser will fall back to using SSL 3.0.
<LI><b>Loading a page that supports encryption.</b> Select this warning if you want to be reminded whenever you are loading a page that supports encryption.
<LI><b>Loading a page that uses low-grade encryption.</b> Select this warning if you want to be reminded whenever you are loading a page that supports low-grade encryption. (Low-grade encryption is the weakest encryption available, using 40-bit keys.)
<LI><b>Leaving a page that supports encryption.</b> Select this warning if you want to be reminded whenever you are leaving a page that supports encryption for one that does not.
<LI><b>Sending form data from an unencrypted page to an unencrypted page.</b> Select this warning if you want to be reminded whenever you are submitting data over an unencrypted connection. <b>You may want to select this option even if you don't want any of the others, so you don't inadvertently send sensitive
information that isn't encrypted. </b>If you send unencrypted information over the Internet, it can easily be intercepted by other people.
<LI><b>Viewing a page with an encrypted/unencrypted mix.</b> Select this warning if you want to be alerted whenever you are viewing a page that includes any information that's not encrypted.
<p>For short definitions, click <ahref="glossary.html#authentication">authentication</a>, <ahref="glossary.html#encryption">encryption</a>, or <ahref="glossary.html#certificate">certificate</a>.</P>
