<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
h2
{mso-style-priority:9;
mso-style-link:"Heading 2 Char";
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:18.0pt;
font-family:"Times New Roman","serif";
font-weight:bold;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.Heading2Char
{mso-style-name:"Heading 2 Char";
mso-style-priority:9;
mso-style-link:"Heading 2";
font-family:"Times New Roman","serif";
font-weight:bold;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:12.0pt'>Dear SIP Forum Members:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p><p class=MsoNormal>ATIS and the SIP Forum have just announced the publication of a new <b>Joint ATIS/SIP Forum Standard, Signature-based Handling of Asserted information using toKENs (SHAKEN): Governance Model and Certificate Management</b> that expands the SHAKEN framework, introducing a governance model and defining X.509 certificate management procedures. Certificate management provides mechanisms for validation of a certificate and verification of the associated digital signature, allowing for the identification of illegitimate use of national telecommunications infrastructure.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The SHAKEN (Signature-based Handling of Asserted information using toKENs) specification is a major advancement in industry efforts to mitigate unwanted Robocalls and caller ID spoofing. <span style='font-size:12.0pt'>Developed to efficiently implement the IETF’s STIR (Secure Telephony Identity Revisited) standard, SHAKEN defines a signature to verify the calling number and specifies how it will be transported in SIP “on the wire.” The SHAKEN framework provides guidance for service providers to implement STIR. Together, STIR/SHAKEN offers a practical mechanism to provide verified information about the calling party as well as the origin of the call — what is known as “attestation” — for the first time in the network. Giving service providers the tools needed to sign and verify calling numbers makes it possible for consumers to know, before answering, that the calls they receive are from legitimate parties.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt'>To learn more about the Joint ATIS/SIP Forum NNI Task Force, For more information about the Joint ATIS/SIP Forum NNI Task Force, and to obtain copies of the completed, ratified specifications, including the recently published specification, please visit <a href="https://www.sipforum.org/activities/nni-task-force-introduction/">the NNI Task Force Introduction Page</a>.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>All best,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Marc<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>*************************<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Marc Robins<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>President and Managing Director<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>SIPNOC Program Chair<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Director, SIPconnect Certification Testing Program<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>SIP Forum<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><a href="http://www.sipforum.org/"><span style='color:blue'>http://www.sipforum.org</span></a><o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Mobile: 203-829-6307<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>SkypeMe! marcrobins<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>*************************<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>