~ubuntu-branches/ubuntu/precise/kompozer/precise

<ul><li><b>Edit Ciphers:</b> Don't attempt to edit ciphers individually unless you know exactly what you are doing and have cleared the changes with your system administrator. For more information, see <a href="#cipher_help">Edit Ciphers</a>. </li></ul>

<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.

<h3>SSL Warnings</h3>

<p>It's easy to tell when the web site you are viewing is using an encrypted connection.

If the connection is encrypted, the lock icon in the lower-right corner of the Navigator

window is locked. If the connection is not encrypted, the lock icon is unlocked.</P>

<p>If you want additional warnings, you can select one or more of

the warning checkboxes in the SSL preferences panel. Some people find these warnings annoying.

<p>To activate any of these Navigator warnings, select the corresponding checkbox:

</P>

<ul>

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<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.

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<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.)

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<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.

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<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. If you send unencrypted information over the Internet, it can easily be intercepted by other people.

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<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.

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</ul>

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<p>For short definitions, click <a href="glossary.html#authentication">authentication</a>, <a href="glossary.html#encryption">encryption</a>, or <a href="glossary.html#certificate">certificate</a>.</P>

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<hr>

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<h2>Edit Ciphers</h2>

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<p>This section describes how to use the Edit Ciphers dialog box. If you're not already viewing it, follow these steps:

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<ol>

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<li>Open the Edit menu (Mozilla menu on Mac OS X) and choose Preferences.

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<li>Under the Privacy & Security category, click SSL. (If no subcategories are visible, double-click Privacy & Security to expand the list.)

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<li>Click the Edit Ciphers button.

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</ol>

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<p>The Edit Ciphers dialog box allows you to select or deselect ciphers, or <a href="glossary.html#cryptographic_algorithm">cryptographic algorithms</a>. Consult your system administrator before changing any of these settings.

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<p>Each checkbox corresponds to a cipher suite, or set of cryptographic algorithms.

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<p>For more information about ciphers and encryption, see the following online documents:

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<ul>

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<li><a href="http://developer.netscape.com/docs/manuals/security/pkin/index.htm" target="_blank">Introduction to Public-Key Cryptography</a>

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<li><a href="http://developer.netscape.com/docs/manuals/security/sslin/index.htm" target="_blank">Introduction to SSL</a>

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<li><a href="http://www.mozilla.org/projects/security/pki/nss/nss-3.4/nss-3.4-algorithms.html" target="_blank">Encryption Technologies Available in NSS 3.4</a>.

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</ul>

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<p> 

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</body>

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</html>

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