Capital One Services LLC received EPO Patent No. EP3861492A1, published March 25, 2026, for cryptographic authentication systems and methods applicable to contactless cards. The patent covers authentication mechanisms using cryptographic protocols for secure contactless transactions. Designated states include AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LI, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, and TR.

This patent publication represents an intellectual property milestone rather than a compliance obligation. Entities developing contactless card authentication systems may need to assess whether Capital One's patented technologies overlap with their products. No immediate regulatory action is required, but companies in payment technology should review for potential licensing implications if developing similar cryptographic authentication methods.