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<?xml-stylesheet type="text/xsl" href="https://devzone.nordicsemi.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>lesc bit is set while not in mode 1 lv4</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/73041/lesc-bit-is-set-while-not-in-mode-1-lv4</link><description>I&amp;#39;m testing the how does pair/bond works. SDK17 
 I find that if only LESC enabled, AUTH_STATUS tells not in sm1 lv4,but lesc bit is 1. 
 Is this a bug?</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Wed, 24 Mar 2021 01:37:57 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/73041/lesc-bit-is-set-while-not-in-mode-1-lv4" /><item><title>RE: lesc bit is set while not in mode 1 lv4</title><link>https://devzone.nordicsemi.com/thread/301563?ContentTypeID=1</link><pubDate>Wed, 24 Mar 2021 01:37:57 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:ac408750-9398-41ca-9ce6-adf621ec6430</guid><dc:creator>daoms</dc:creator><description>&lt;p&gt;That&amp;#39;s it. Thanks.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: lesc bit is set while not in mode 1 lv4</title><link>https://devzone.nordicsemi.com/thread/301375?ContentTypeID=1</link><pubDate>Tue, 23 Mar 2021 10:25:17 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:1cff81a6-fbfb-44a9-a5db-63ae05140ebc</guid><dc:creator>Dmitry</dc:creator><description>&lt;p&gt;Maybe it&amp;#39;s a bit confusing but LESC ans security level 4 are different things. LESC bit just means that EDCH key exchange is done.&amp;nbsp;LESC pairing supports &amp;quot;just works&amp;quot; mode, but this mode cannot be qualified as &amp;quot;level 4&amp;quot; because level 4 requires an authenticated link, and &amp;quot;just works&amp;quot; link is not authenticated, no matter whether you&amp;#39;re using ECDH or not ( see &lt;a href="https://devzone.nordicsemi.com/f/nordic-q-a/21715/require-ble-4-2-key-exchange-but-not-mitm/85296#85296"&gt;an explanation&lt;/a&gt; by Peter).&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: lesc bit is set while not in mode 1 lv4</title><link>https://devzone.nordicsemi.com/thread/301351?ContentTypeID=1</link><pubDate>Tue, 23 Mar 2021 09:28:54 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:e660bf24-8035-4125-8c6d-8d000c51ca7c</guid><dc:creator>daoms</dc:creator><description>&lt;p&gt;My problem is when lv4 is 0, lesc bit shouldn&amp;#39;t be 1 in AUTH_STATUS.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: lesc bit is set while not in mode 1 lv4</title><link>https://devzone.nordicsemi.com/thread/301040?ContentTypeID=1</link><pubDate>Sat, 20 Mar 2021 10:51:41 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:650fb048-24c3-4bf9-b742-c794f0f044f0</guid><dc:creator>Dmitry</dc:creator><description>&lt;p&gt;Hi,&lt;/p&gt;
&lt;p&gt;sm1 lv4 requires MITM protected link. As you didn&amp;#39;t configure MITM, the link is considered sm1 lv2.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>