<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>gene-h</author><text>Well if one modifies the channel state information in an unpredictable manner while performing sensitive operations, it becomes very difficult to extract any information. The simplest way to do this might be to fidget. Use one hand to type and another hand to fidget with something.&lt;p&gt;A more high tech method would be to use a modulated wifi reflector that is randomly modulated.&lt;p&gt;One should also watch out for wifi hotspots with ominously pointed directional antenna</text><parent_chain><item><author>gefh</author><text>Holy shit.
From a brief scan it looks like the paper concentrates on recovering a numeric pin, but these attacks never get worse, only better, so I assume full keyboard access is not too far off.
What&amp;#x27;s the defense? Have your phone manage the passwords and unlock via fingerprint?</text></item></parent_chain></comment><story><title>Inferring Your Mobile Phone Password via WiFi Signals</title><url>http://fermatslibrary.com/s/when-csi-meets-public-wifi-inferring-your-mobile-phone-password-via-wifi-signals</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>droopybuns</author><text>I think this is pretty hand-wavey and requires a lot assumptions to be true.&lt;p&gt;Also: &amp;quot;We collected training and testing data from 10 volunteers.&amp;quot; Not a statistically useful sample set.&lt;p&gt;Under very controlled environments, measuring signal deltas may be possible- but I would like to see sample data that suggests high success rates before I think this is worthy of concern.&lt;p&gt;Finally- Self tuning antennas are a thing.  This is going to get harder over time.  &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.qualcomm.com&amp;#x2F;videos&amp;#x2F;qualcomm-rf360-dynamic-antenna-matching-tuner-qfe2550&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.qualcomm.com&amp;#x2F;videos&amp;#x2F;qualcomm-rf360-dynamic-anten...&lt;/a&gt;</text><parent_chain><item><author>gefh</author><text>Holy shit.
From a brief scan it looks like the paper concentrates on recovering a numeric pin, but these attacks never get worse, only better, so I assume full keyboard access is not too far off.
What&amp;#x27;s the defense? Have your phone manage the passwords and unlock via fingerprint?</text></item></parent_chain></comment><story><title>Inferring Your Mobile Phone Password via WiFi Signals</title><url>http://fermatslibrary.com/s/when-csi-meets-public-wifi-inferring-your-mobile-phone-password-via-wifi-signals</url></story>