Mr Draper told the Guardian he was considering resigning from his role running LabourList, a Labour-supporting website.

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With a single token, a consumer could securely log into any supporting website.

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However, no parental notice and consent is required when an operator collects a persistent identifier for the sole purpose of supporting the website or online service's internal operations, such as contextual advertising, frequency capping, legal compliance, site analysis, and network communications.

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