| Meno: | Martin
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| Priezvisko: | ©rámek
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| Názov: | Transferring information by ringing a cell phone
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| Vedúci: | RNDr. Michal Foriąek, PhD.
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| Rok: | 2014
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| Blok: | INF
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| Kµúčové slová: | ringing, phone, side channel, Android
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| Abstrakt: | Ringing a phone without answering the call can be viewed as a side communication channel in the cell phone network. We defined a theoretical model describing this channel and proposed several protocols that take advantage of it to transmit arbitrary data. We estimated the capacity of the channel and showed that our protocols reach near-optimal efficiency. As a proof of concept, we also created an Android application that uses ringing to send text messages.
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