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        !             5: <TITLE>Encryption (ECP) layer</TITLE>
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        !             8: 
        !             9: <A HREF="mpd.html"><EM>Mpd 5.6 User Manual</EM></A>
        !            10:  <b>:</b> <A HREF="mpd17.html"><EM>Configuring Mpd</EM></A>
        !            11:  <b>:</b> <EM>Encryption (ECP) layer</EM><BR>
        !            12: <b>Previous:</b> <A HREF="mpd22.html"><EM>Bundle layer</EM></A><BR>
        !            13: <b>Next:</b> <A HREF="mpd24.html"><EM>Compression (CCP) layer</EM></A>
        !            14: 
        !            15: 
        !            16: <HR NOSHADE>
        !            17:   <H2><A NAME="23"></A>4.5. Encryption (ECP) layer<A NAME="encryption"></A></H2>
        !            18: <p>This chapter describes commands that configure the Encryption Control
        !            19: Protocol (ECP) layer. All of these commands apply to the currently
        !            20: active bundle.</p>
        !            21: <p>To use ECP you should enable encryption at the bundle level.
        !            22: To allow encryption to be negotiated you should enable here some of 
        !            23: encryption protocols.</p>
        !            24: <p><b>Note:</b> In PPP, encryption should be handled by the ECP rather than CCP.  
        !            25: However, Microsoft combined both compression and encryption 
        !            26: into their ``compression'' algorithm (MPPC), which is confusing.</p>
        !            27: <p>
        !            28: <dl>
        !            29: 
        !            30: <dt><b><code>set ecp key <em>string</em> </code></b><dd>
        !            31: <p>Sets the encryption key.</p>
        !            32: 
        !            33: <dt><b><code>set ecp accept <em>option ...</em> </code></b><dd>
        !            34: <dt><b><code>set ecp deny <em>option ...</em> </code></b><dd>
        !            35: <dt><b><code>set ecp enable <em>option ...</em> </code></b><dd>
        !            36: <dt><b><code>set ecp disable <em>option ...</em> </code></b><dd>
        !            37: <dt><b><code>set ecp yes <em>option ...</em> </code></b><dd>
        !            38: <dt><b><code>set ecp no <em>option ...</em> </code></b><dd>
        !            39: <p>These commands configure various ECP options. Each direction of
        !            40: traffic (transmit and receive) is independent from the other.
        !            41: All options default to <code><b>disable</b></code> and <code><b>deny</b></code>.</p>
        !            42: <p>The <code><b>enable</b></code> and <code><b>disable</b></code> commands determine
        !            43: whether we desire the corresponding option on received data.
        !            44: The <code><b>accept</b></code> and <code><b>deny</b></code> commands determine
        !            45: whether we will allow the peer to request the corresponding option
        !            46: (which we must enable on our transmitted data).</p>
        !            47: 
        !            48: <p>The <b><code>yes</code></b> command is the same as
        !            49: <code><b>enable</b></code> and <code><b>accept</b></code>.
        !            50: The <b><code>no</code></b> command is the same as
        !            51: <code><b>disable</b></code> and <code><b>deny</b></code>.</p>
        !            52: 
        !            53: </dl>
        !            54: </p>
        !            55: 
        !            56: <p>The options available at the ECP layer are:</p>
        !            57: <p>
        !            58: <dl>
        !            59: 
        !            60: <dt><b><code>dese-bis</code></b><dd><p>This option enables DESE-bis (rfc 2419) encryption.
        !            61: This algorithm implemented in user-level, so require much CPU power
        !            62: on fast (&gt;10Mbit/s) links.</p>
        !            63: <p>The default is disable.</p>
        !            64: 
        !            65: <dt><b><code>dese-old</code></b><dd><p>This option enables DESE (rfc 1969) encryption.
        !            66: This algorithm implemented in user-level, so require much CPU power
        !            67: on fast (&gt;10Mbit/s) links.</p>
        !            68: <p><b>Note:</b> DESE protocol is deprecated. Because of data padding 
        !            69: to the next 8 octets boundary, required by block nature of DES encryption, 
        !            70: dese-old option can have interoperability issues with other protocols 
        !            71: which work over it. As example, it is incompatible with Predictor-1 and 
        !            72: Deflate compressions.</p>
        !            73: <p>The default is disable.</p>
        !            74: 
        !            75: </dl>
        !            76: </p>
        !            77: 
        !            78:  <HR NOSHADE>
        !            79: <A HREF="mpd.html"><EM>Mpd 5.6 User Manual</EM></A>
        !            80:  <b>:</b> <A HREF="mpd17.html"><EM>Configuring Mpd</EM></A>
        !            81:  <b>:</b> <EM>Encryption (ECP) layer</EM><BR>
        !            82: <b>Previous:</b> <A HREF="mpd22.html"><EM>Bundle layer</EM></A><BR>
        !            83: <b>Next:</b> <A HREF="mpd24.html"><EM>Compression (CCP) layer</EM></A>
        !            84: 
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