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Martin Geddes
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Intelligence is harmful

October 7, 2005 10:22 AM

Topics: Security | Technology

From Bruce Schneier’s security blog:

Turns out that you can jam cellphones with SMS messages. Text messages are transmitted on the same channel that is used to set up voice calls, so if you flood the network with one then the other can’t happen. The researchers believe that sending 165 text messages a second is enough to disrupt all the cellphones in Manhattan.

Naturally, a stupid network would not suffer from such a performance bottleneck that can be exploited maliciously.

And IMS will keep you totally safe, 100% available, honest ;) No intelligent bottlenecks in this network! Move along please…

via Telepocalpyse

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Posted by: Hans Blaauw at October 8, 2005 2:50 AM

Does not surprise me. When i worked as a programmer in the mobile business (SMS) we had these funny applications where we could hack the display of another SMS receiver by putting a message on the phone that was not removable.

Also, when we showed for the first time our senderID to a Telco (years ago and by using our software) they said it was not possible.

This proves to me that many of these Telco's don't know their network very well and that it is hackable.

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