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Singapore is known as a city of sensors. Singapore's surveillance structure spreads widely from Closed-circuit television (CCTV) in public areas even around the neighbourhood, internet monitoring/traffic monitoring and to the use of surveillance metadata for government initiatives. In Singapore, SIM card registration is mandatory even for prepaid card. Singapore's government have the rights to access communication data. Singapore's largest telecompany, Singtel, has close relations to the government and Singapore's laws are broadly phrased to allow the government to obtain sensitive data such as text-messages, email, call logs, and web surfing history from its people without the need for court permission.