The purpose of this document is to provide guidance to the European payment industry in the field of cryptographic algorithms and related key management issues.

Its target audience includes security officers, risk managers, system engineers and systems designers. Although its content does not assume expertise in cryptology, it contains some sections which require a basic mathematical background.

The document specifies a number of recommendations and best practices on cryptographic algorithms, security protocols, confidentiality and integrity protection and key management in the first section, for which further detailed background information may be found in the subsequent sections of the document.

In this version updates have been made regarding the usage of some algorithms and security protocols, and the sections on quantum computing, distributed ledger technology have been reviewed and updated as needed, including new background information.

In producing these guidelines, the European Payments Council ( ) aims to provide a reference basis to support payment service providers and other actors of the payment industry. However, it needs to be recognised that research and developments in cryptology are constantly evolving. Therefore, the plans to annually review and update the document to reflect the state of the art in light of major new developments and to keep it aligned with the documents referenced.

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