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<title>Microsoft Point-to-Point Encryption</title>

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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Microsoft Point-to-Point Encryption</span></span>

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<div id="mw-content-text" class="mw-body-content mw-content-ltr" lang="en" dir="ltr"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><p><b>Microsoft Point-to-Point Encryption (MPPE)</b> encrypts data in <a href="Point-to-Point_Protocol" title="Point-to-Point Protocol">Point-to-Point Protocol (PPP)</a>-based dial-up connections or <a href="Point-to-Point_Tunneling_Protocol" title="Point-to-Point Tunneling Protocol">Point-to-Point Tunneling Protocol</a> (PPTP) virtual private network (VPN) connections. 128-bit key (strong), 56-bit key, and 40-bit key (standard) MPPE encryption schemes are supported. MPPE provides data security for the PPTP connection that is between the <a href="Virtual_private_network" title="Virtual private network">VPN</a> client and the VPN server.

</p><p>MPPE alone does not compress or expand data, but the protocol is often used in conjunction with <a href="Microsoft_Point-to-Point_Compression" title="Microsoft Point-to-Point Compression">Microsoft Point-to-Point Compression</a> which compresses data across PPP or <a href="Virtual_private_network" title="Virtual private network">VPN</a> links.

</p><p>Negotiation of MPPE happens within the <a href="Compression_Control_Protocol" class="mw-redirect" title="Compression Control Protocol">Compression Control Protocol</a> (CCP), a subprotocol of PPP. This can lead to incorrect belief that it is a compression protocol.

</p><p>RFC 3078, which defines this protocol, defines <a href="RC4" title="RC4">RC4</a> with either 40-bit or 128-bit key lengths as the only encryption options with this protocol.

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<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>

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</style>RFC <a rel="nofollow" class="external text" href="https://www.rfc-editor.org/rfc/rfc3078">3078</a> (the protocol), RFC <a rel="nofollow" class="external text" href="https://www.rfc-editor.org/rfc/rfc3079">3079</a> (deriving initial session keys)</li>

<li><a rel="nofollow" class="external text" href="http://www.networksorcery.com/enp/protocol/mppe.htm">MPPE, Microsoft Point-To-Point Encryption Protocol</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20130730084201/http://www.networksorcery.com/enp/protocol/mppe.htm">Archived</a> 2013-07-30 at the <a href="Wayback_Machine" title="Wayback Machine">Wayback Machine</a></li></ul>

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</style><div id="Virtual_private_networking143" style="font-size:114%;margin:0 4em"><a href="Virtual_private_network" title="Virtual private network">Virtual private networking</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Communication_protocol" title="Communication protocol">Communication protocols</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<li><a href="DirectAccess" title="DirectAccess">DirectAccess</a></li>

<li><a href="IPsec" title="IPsec">IPsec</a></li>

<li><a href="Split_tunneling" title="Split tunneling">Split tunneling</a></li>

<li>(<a href="Opportunistic_encryption" title="Opportunistic encryption">Opportunistic</a>: <a href="Tcpcrypt" title="Tcpcrypt">tcpcrypt</a>)</li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Connection applications</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="FreeLAN" title="FreeLAN">FreeLAN</a></li>

<li><a href="FreeS/WAN" title="FreeS/WAN">FreeS/WAN</a></li>

<li><a href="Libreswan" title="Libreswan">Libreswan</a></li>

<li><a href="OpenConnect" title="OpenConnect">OpenConnect</a></li>

<li><a href="OpenIKED" title="OpenIKED">OpenIKED</a></li>

<li><a href="Openswan" title="Openswan">Openswan</a></li>

<li><a href="OpenVPN" title="OpenVPN">OpenVPN</a></li>

<li><a href="Social_VPN" title="Social VPN">Social VPN</a></li>

<li><a href="SoftEther_VPN" title="SoftEther VPN">SoftEther VPN</a></li>

<li><a href="StrongSwan" title="StrongSwan">strongSwan</a></li>

<li><a href="Tcpcrypt" title="Tcpcrypt">tcpcrypt</a></li>

<li><a href="WireGuard" title="WireGuard">WireGuard</a></li>

<li><a href="Shadowsocks" title="Shadowsocks">Shadowsocks</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Enterprise_software" title="Enterprise software">Enterprise software</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Avast_SecureLine_VPN" title="Avast SecureLine VPN">Avast SecureLine VPN</a></li>

<li><a href="Check_Point_VPN-1" class="mw-redirect" title="Check Point VPN-1">Check Point VPN-1</a></li>

<li><a href="LogMeIn_Hamachi" title="LogMeIn Hamachi">LogMeIn Hamachi</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Risk vectors</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Content-control_software" class="mw-redirect" title="Content-control software">Content-control software</a></li>

<li><a href="Deep_content_inspection" title="Deep content inspection">Deep content inspection</a></li>

<li><a href="Deep_packet_inspection" title="Deep packet inspection">Deep packet inspection</a></li>

<li><a href="IP_address_blocking" title="IP address blocking">IP address blocking</a></li>

<li><a href="Network_enumeration" title="Network enumeration">Network enumeration</a></li>

<li><a href="Stateful_firewall" title="Stateful firewall">Stateful firewall</a></li>

<li><a href="TCP_reset_attack" title="TCP reset attack">TCP reset attack</a></li>

<li><a href="VPN_blocking" title="VPN blocking">VPN blocking</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="VPN_service" title="VPN service">VPN Services</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:10em"><a href="Avast" title="Avast">Avast</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

<li><a href="Avast_SecureLine_VPN" title="Avast SecureLine VPN">SecureLine</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:10em"><a href="Kape_Technologies" class="mw-redirect" title="Kape Technologies">Kape Technologies</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em">

<ul><li>CyberGhost</li>

<li><a href="ExpressVPN" title="ExpressVPN">ExpressVPN</a></li>

<li><a href="Private_Internet_Access" title="Private Internet Access">Private Internet Access</a></li>

<li>Zenmate</li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:10em"><a href="McAfee" title="McAfee">McAfee</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="TunnelBear" title="TunnelBear">TunnelBear</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:10em">Tesonet</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="NordVPN" title="NordVPN">NordVPN</a></li>

<li><a href="NordLayer" title="NordLayer">NordLayer</a></li>

<li><a href="Surfshark" class="mw-redirect" title="Surfshark">Surfshark</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:10em"><a href="Ziff_Davis" title="Ziff Davis">Ziff Davis</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="IPVanish" title="IPVanish">IPVanish</a></li>

<li><a href="StrongVPN" class="mw-redirect" title="StrongVPN">StrongVPN</a></li></ul>

</div></td></tr></tbody></table><div>

<li><a href="Mozilla_VPN" title="Mozilla VPN">Mozilla VPN</a></li>

<li><a href="Mullvad" title="Mullvad">Mullvad</a></li>

<li><a href="PrivadoVPN" title="PrivadoVPN">PrivadoVPN</a></li>

<li>FineVPN</li>

<li><a href="Proton_VPN" title="Proton VPN">Proton VPN</a></li>

<li><a href="PureVPN" title="PureVPN">PureVPN</a></li>

<li><a href="SaferVPN" title="SaferVPN">SaferVPN</a></li>

<li><a href="Tailscale" title="Tailscale">Tailscale</a></li>

<li><a href="Windscribe" title="Windscribe">Windscribe</a></li></ul></div></td></tr></tbody></table></div></div><div><div class="zim-footer">

This article is issued from <a class="external text" title="Last edited on 2023-10-17" href="https://en.wikipedia.org/wiki/?title=Microsoft_Point-to-Point_Encryption&oldid=1180505125">Wikipedia</a>. The text is available under <a class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-Share Alike 4.0</a> unless otherwise noted. Additional terms may apply for the media files.

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