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0x62) Can anyone point me to a resource for computing parameters with a valid MAC? Thanks for your attention, Rupert --089e013d1f28c0d5d004d784db04 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr">Good Afternoon,<div><br></div><div>I am trying to perform = USIM/3G authentication using=A0osmo-sim-auth and ran into the same problem = as Stefanos:</div><div><a href=3D"http://lists.osmocom.org/pipermail/simtra= ce/2012-November/000406.html">http://lists.osmocom.org/pipermail/si… 012-November/000406.html</a></div> <div><br></div><div>I followed Benoit&#39;s advice to view the details as f= ollows (using the inputs from the web page):</div><div><br><div><div>&gt; r= and_bin =3D stringToByte(a2b_hex(&#39;00000000000000000000000000000000&#39;= ))</div> <div>&gt; autn_bin =3D stringToByte(a2b_hex(&#39;ec9320c2c2000000e1dd22c1ad= 3e2d3d&#39;))</div></div><div>&gt; u.authenticate(RAND=3Drand_bin, AUTN=3Da= utn_bin,ctx=3D&#39;3G&#39;)<br></div><div>&gt; u.coms()<br></div><div><br><= /div> <div><pre style=3D"margin-top:0px;margin-bottom:0px;padding:0px;border:0px;= font-family:monospace,sans-serif;font-size:14px;line-height:17px;vertical-a= lign:baseline;white-space:pre-wrap;color:rgb(0,0,0)">[&#39;INTERNAL AUTHENT= ICATE apdu: 00 88 00 81 22 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 = 00 10 EC 93 20 C2 C2 00 00 00 E1 DD 22 C1 AD 3E 2D 3D&#39;, &#39;sw1, sw2: 98 62 - undefined status&#39;, (152, 98), []]</pre></div><div><br></div></div><div style>From=A0TS 31.102, section 7= .3.1 it looks like this means a MAC failure (0x98 0x62)</div><div style><br= s with a valid MAC?</div> <div style><br></div><div style>Thanks for your attention,</div><div style>= <br></div><div style>Rupert</div></div> --089e013d1f28c0d5d004d784db04--