<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yiv9544236483"><div class="qtdSeparateBR"><br><br></div><div class="yiv9544236483yqt4182259879" id="yiv9544236483yqtfd11412"></div><div id="yui_3_16_0_ym19_1_1465228763947_8024"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;" id="yui_3_16_0_ym19_1_1465228763947_8023"><div id="yiv9544236483"><div class="yiv9544236483yqt4182259879" id="yiv9544236483yqtfd29686"><div class="yiv9544236483qtdSeparateBR" id="yui_3_16_0_ym19_1_1465228763947_8272"><br clear="none"><br clear="none"></div><div class="yiv9544236483yqt1853923851" id="yiv9544236483yqtfd45254"></div></div><div id="yiv9544236483yui_3_16_0_ym19_1_1465226937435_3507"><div id="yiv9544236483yui_3_16_0_ym19_1_1465226937435_3506" style="color:rgb(0, 0, 0);background-color:rgb(255, 255, 255);"><div id="yiv9544236483"><div id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_14685"><div id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_14684" style="color:rgb(0, 0, 0);background-color:rgb(255, 255, 255);"><div dir="ltr" id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_6752" style="font-family:HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:16px;"><div class="yiv9544236483yqt4182259879" id="yiv9544236483yqtfd32603"><div class="yiv9544236483yqt1853923851" id="yiv9544236483yqtfd17041"><span id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_6739" style="font-family:'Helvetica Neue', 'Segoe UI', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:13px;">> Its an interactive attack, relying on "amplifying" side channel effects</span><br clear="none" id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_6740" style="font-family:'Helvetica Neue', 'Segoe UI', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:13px;"><span id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_6741" style="font-family:'Helvetica Neue', 'Segoe UI', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:13px;">adaptively. Thats like being able to poke the bird and make it tweet</span><br clear="none" id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_6742" style="font-family:'Helvetica Neue', 'Segoe UI', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:13px;"><span id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_6743" style="font-family:'Helvetica Neue', 'Segoe UI', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:13px;">(in Jonathan's original analogy). This is quite different from sampling</span><br clear="none" id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_6744" style="font-family:'Helvetica Neue', 'Segoe UI', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:13px;"><span id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_6745" style="font-family:'Helvetica Neue', 'Segoe UI', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:13px;">a signal from a system non-interactively. If you get to ask questions</span><br clear="none" id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_6746" style="font-family:'Helvetica Neue', 'Segoe UI', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:13px;"><span id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_6747" style="font-family:'Helvetica Neue', 'Segoe UI', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:13px;">you can bias answers. So triggering the "bird" to tweet relative to the </span><br clear="none" id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_6748" style="font-family:'Helvetica Neue', 'Segoe UI', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:13px;"><span id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_6749" style="font-family:'Helvetica Neue', 'Segoe UI', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:13px;">low bandwidth sampling boundary allows us to probe data within the structure</span><br clear="none" id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_6750" style="font-family:'Helvetica Neue', 'Segoe UI', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:13px;"><span id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_6751" style="font-family:'Helvetica Neue', 'Segoe UI', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:13px;">of a signal we could not possibly sample under Nyquist restrictions.</span></div></div><span></span></div> <div class="yiv9544236483qtdSeparateBR" id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_14754" style="font-family:HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:16px;"><br clear="none"></div><div class="yiv9544236483qtdSeparateBR" dir="ltr" id="yiv9544236483yui_3_16_0_ym19_1_1465223635096_14754"><font id="yiv9544236483yui_3_16_0_ym19_1_1465226937435_3752" face="Helvetica Neue, Segoe UI, Helvetica, Arial, Lucida Grande, sans-serif"><span id="yiv9544236483yui_3_16_0_ym19_1_1465226937435_3751" style="font-size:13px;">But a public-facing server would regularly be "tweeting", no?</span></font></div></div></div></div></div></div></div></div></div></div></div></body></html>