Encryption of Short Message Service in Global System for Mobile Communications

摘要

Nowadays more and more companies are using cellphone message to verify users'identities. However, because there is no data encryption in global system for mobile communications (GSM) short message service (SMS), the being sent message is easily to be listened during transmission and your identity could be replaced by somebody else.[1]In this paper, we use an open source project osmocomBB and the corresponding peripheral devices, i.e. Moto C118 and CP2120, to capture the experimental GSM SMS messages. We analyze the GSM packets with a data-packet analyzing tool, which is calledwireshark. Then, in order to accomplish the transmission safety, the SMS message is encryptedby using the message digest algorithm (MD5). The proposed application of this algorithm in GSM SMS is demonstrated by our experiments.