The EPO published Nokia Technologies Oy patent EP3716565A1, titled 'Controlled Data Access in a Communication Network.' The invention relates to methods for controlling data access using secure communication protocols and authentication mechanisms in network environments. The patent covers IPC classifications H04L 9/40 (network security), H04L 9/32 (digital signatures), H04L 9/08 (key management), and G06F 21/64 (data integrity), designating multiple European states including Germany, France, UK, Italy, and Spain.

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