+<a name="f1_380"></a>
+<samp class="highlight">Q: It is said SILC is designed security in mind
+from the day one. What does it mean?</samp><br />
+A: It means that when SILC was designed it was designed as security
+protocol, not as conferencing protocol which has security features. It
+means that security was the top priority and security issues was analyzed
+when adding new features to the protocol. It also means, that SILC was
+designed from attacker's point of view. Instead of just adding security
+measures to the protocol we first analyzed attacks against the protocol
+(and other protocols) and then designed the SILC to resist the attacks.
+The protocol of course easily gets very complex and then analyzing gets
+harder and harder, new attacks are discovered that we didn't know about,
+and for this reason the analyzing is constant and ongoing process.
+<br /> <br />
+
+<a name="f1_390"></a>
+<samp class="highlight">Q: If someone joins/leaves the channel, how is
+assured that he cannot decrypt old/new channel messages?</samp><br />
+A: Channel key is always regenerated when someone joins or leaves the
+channel. This assures that it is not possible to decrypt channel messages
+before you have joined the channel, you cannot decrypt old channel
+messages after you have joined the channel since they were encrypted with
+different key, and you cannot decrypt channel message after leaving the
+channel since all new messages will be encrypted with differnet key. In
+short, you will know the channel key only when you are joined on the
+channel, and this is the only time when channel messages can be sent or
+received.
+<br /> <br />
+