Editing Tokenization (data security) (section)

=== High-value tokens (HVTs) ===
HVTs serve as surrogates for actual [[Payment card number|PANs]] in payment transactions and are used as an instrument for completing a payment transaction. In order to function, they must look like actual PANs. Multiple HVTs can map back to a single PAN and a single physical credit card without the owner being aware of it. Additionally, HVTs can be limited to certain networks and/or merchants whereas PANs cannot.

HVTs can also be bound to specific devices so that anomalies between token use, physical devices, and geographic locations can be flagged as potentially fraudulent. HVT blocking enhances efficiency by reducing computational costs while maintaining accuracy and reducing record linkage as it reduces the number of records that are compared.<ref>O’hare, K., Jurek-Loughrey, A., & De Campos, C. (2022). High-Value Token-Blocking: Efficient Blocking Method for Record Linkage. ACM Transactions on Knowledge Discovery from Data, 16(2), 1–17. https://doi.org/10.1145/3450527</ref>