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The clause establishes the operational mechanism and authorization for contact discovery functionality, clarifying that contact information undergoes cryptographic hashing before transmission and that this process is optional rather than mandatory. This defines the technical scope of what data processing Signal performs when users elect to use the contact discovery feature.
Users who elect to use Signal's contact discovery feature authorize the transmission of hashed contact data from their device to Signal's servers for the purpose of identifying which contacts have Signal accounts. The provision describes the cryptographic protection applied during this transmission but does not restrict Signal's ability to perform this processing when the feature is enabled.
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"Signal can optionally discover which contacts in your address book are Signal users, using a service designed to protect the privacy of your contacts. Information from the contacts on your device may be cryptographically hashed and transmitted to the server in order to determine which of your contacts are registered.— Excerpt from Signal's Signal Privacy Policy
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The clause establishes the operational mechanism and authorization for contact discovery functionality, clarifying that contact information undergoes cryptographic hashing before transmission and that this process is optional rather than mandatory. This defines the technical scope of what data processing Signal performs when users elect to use the contact discovery feature.
Users who elect to use Signal's contact discovery feature authorize the transmission of hashed contact data from their device to Signal's servers for the purpose of identifying which contacts have Signal accounts. The provision describes the cryptographic protection applied during this transmission but does not restrict Signal's ability to perform this processing when the feature is enabled.
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