Blinding Identity Taxonomy

The BIT Report is an official Kantara Initiative report (PDF format / HTML format) 

OCA capture bases contain a "pii_attributes" flagging block to enable schema issuers to flag attributes that could potentially unblind the identity of a governing entity. In order to establish commonality across Working Groups (WGs), Task Forces (TFs), and Focus Groups (FGs) at Trust over IP, the BIT fields and notes are defined below for general reference.

BIT Fields & Notes

The field(s) below may be represented by single or multiple fields in your application. The overall suggested approach is to be conservative. When reviewing the contents of your dataset against the taxonomy, you should encrypt if the taxonomy might apply, rather than taking a narrow approach. You may find that a field in your dataset might fall within more than one category. That is to be expected as the definitions are somewhat, and intentionally, fuzzy. More precise or prescriptive definitions are the purview of profiles and schemas, where the population of possible field categories can be prescribed or defined more precisely.

[1] Not all captured dates will reveal a person or entity’s identity but some will so if in doubt, encrypt.

[2] In some use cases, this can be avoided by using only the Month, or Month/Year of birth, but only if this can be validated.

[3] Text which does not have a given structure, nor which is entered in any specific format. Note: All free-form text fields should be encrypted.