As Prof Bill Buchanan OBE on LinkedIn points out, the Brexit Trade Agreement [1] on Page 921 goes:
The underlying certificate used by the s/MIME mechanism has to be in compliance with X.509
standard. In order to ensure common standards and procedures with other Prüm applications, the
processing rules for s/MIME encryption operations or to be applied under various Commercial Product of the Shelves (COTS) environments, are as follows:
– the sequence of the operations is: first encryption and then signing,
– the encryption algorithm AES (Advanced Encryption Standard) with 256 bit key length and
RSA with 1024 bit key length shall be applied for symmetric and asymmetric encryption
respectively,
– the hash algorithm SHA-1 shall be applied.
s/MIME functionality is built into the vast majority of modern e-mail software packages including
Outlook, Mozilla Mail as well as Netscape Communicator 4.x and inter-operates among all major email software packages.
Comments
As Prof Bill Buchanan OBE on LinkedIn points out, the Brexit Trade Agreement [1] on Page 921 goes:
The underlying certificate used by the s/MIME mechanism has to be in compliance with X.509 standard. In order to ensure common standards and procedures with other Prüm applications, the processing rules for s/MIME encryption operations or to be applied under various Commercial Product of the Shelves (COTS) environments, are as follows:
– the sequence of the operations is: first encryption and then signing,
– the encryption algorithm AES (Advanced Encryption Standard) with 256 bit key length and RSA with 1024 bit key length shall be applied for symmetric and asymmetric encryption respectively,
– the hash algorithm SHA-1 shall be applied.
s/MIME functionality is built into the vast majority of modern e-mail software packages including Outlook, Mozilla Mail as well as Netscape Communicator 4.x and inter-operates among all major email software packages.
[1]https://assets.publishing.service.gov.uk/government/uploads/...