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China has brought its repressive surveillance tools to Hong Kong

Move to require ID for SIM card purchases follows website shutdown and controls

| Hong Kong
Readily available prepaid SIM cards have provided a key way for activists to protect their identities during protests.   © dpa/AP

Dan McDevitt is grants and communications manager at, a group focused on monitoring and challenging Chinese internet censorship.

When Hong Kong's national security law went into effect last June, many residents scrubbed their social media accounts of controversial content and switched communications to more private, encrypted alternatives.

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