Censorship in The People's Republic of China - Media, Communication and Education Controls - Short Message Service

Short Message Service

According to Reporters without Borders, China has over 2,800 Short Message Service (text messaging) surveillance centers. As of early 2010, cell phone users in Shanghai and Beijing risk having their text messaging service cut off if they are found to have sent "illegal or unhealthy" content.

In 2003, during the severe-acute-respiratory-syndrome (SARS) outbreak, a dozen Chinese were reportedly arrested for sending text messages about SARS. Skype reported that it was required to filter messages passing through its service for words like "Falun Gong" and "Dalai Lama" before being allowed to operate in China.

During protests over a proposed chemical plant in Xiamen during the summer of 2007, text messaging was blocked to prevent the rallying of more protesters.

Read more about this topic:  Censorship In The People's Republic Of China, Media, Communication and Education Controls

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... The Short Message Service is realised by the use of the Mobile Application Part (MAP) of the SS#7 protocol, with Short Message protocol elements being ... These MAP messages may be transported using 'traditional' TDM based signalling, or over IP using SIGTRAN and an appropriate adaptation layer ... The Short Message protocol itself is defined by 3GPP TS 23.040 for the Short Message Service - Point to Point (SMS-PP), and 3GPP TS 23.041 for the ...

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