PSD2 is a European regulation that aims to adapt payment services to challenges from new technologies and innovation. It establishes a regulatory framework covering access to accounts, security, and risk management. PSD2 went into force in January 2016 and must be transposed into national law by January 2018. It aims to boost innovation, enhance consumer protection for payments, and improve security. PSD2 allows third parties to access payment accounts, including account information service providers (AISPs) and payment initiation service providers (PISPs).