SMS Security

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<p class="MsoNormal"><span>Hello,<p></p></span></p>

<p class="MsoNormal"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; As
far as I understand that the SMS is encrypted in the air interface(between the MS
and BTS).is this true?<p></p></span></p>

<p class="MsoNormal"><span>If so what is
the encryption algorithm used?<p></p></span></p>

<p class="MsoNormal"><span>And is it broken?
<p></p></span></p>

<p class="MsoNormal" dir="RTL"><span dir="LTR"><p>&nbsp;</p></span></p>

<p class="MsoNormal"><span>Regards,</span><p></p></p>

<p class="MsoNormal"><span>&nbsp;<p></p></span></p>

<p class="MsoNormal"><span>Eng.</span><span> Mohammed Al
Fayezi</span><p></p></p>

<p class="MsoNormal"><span>Al Jawal -
IT Security Dep.</span><p></p></p>

<p class="MsoNormal"><span>Tel :4635636</span><p></p></p>

<p class="MsoNormal"><span>Mobile</span><span> :0503819237</span><p></p></p>

<p class="MsoNormal" dir="RTL"><span dir="LTR"><p>&nbsp;</p></span></p>

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