Add section to Frequently Asked Questions - Profiles Sync #4657
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What hash function is used for the external_id_hash field by Profile Sync? Zendesk Ticket : https://segment.zendesk.com/agent/tickets/503271
rchinn1
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rchinn1
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rchinn1
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What hash function is used for the external_id_hash field by Profile Sync? Zendesk Ticket : https://segment.zendesk.com/agent/tickets/503271
What hash function is used for the external_id_hash field by Profile Sync?
The value of the
external_id_hashis a hash of theexternal_id_typeandexternal_id_value, using SHA-1. This field corresponds theprimary_keyfor the table.hash ( external_id_type and external_id_value)For example, in Big Query this is the logic,
TO_HEX(SHA1(concat(external_id_type, external_id_value))) as seg_hash.Customer (MongoDB) reached out in March wondering what hashing algorithm is used by the Profiles Sync, no docs stated this anywhere though it's obvious that a hashing algorithm is used. Since this page is technical listing Profiles Sync Sample Queries, it's likely other customers would also want this information in order to un-hash (decrypt) their user data.
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