View source for Distinguished Encoding Rules

==Full Title==
[[Distinguished Encoding Rules]] (DER) we created to [[ASN.1]] as a syntax for the digital representation of real-word entities such as entries in a telephone directory.

==Context==
The rules were created by the ITU standard S.690 which defines BER, CER and DER. Only DER has seen broad adoption in the [[Public Key Infrastructure]] used for TSL and other certificates.

See the wiki page on [[Distinguished Name]]  (DN).


==Solution==
* This section describes a solution for Microsoft .NET 5.0 called pem-utils.
* The code described was created by Wouter Huysentruit for .NET 4.7.1 (and NetStandard 2.0).
* The revised code for .NET 5.0 in in the github repository https://github.com/TomCJones/pem-utils.

==References==
* The [best Microsoft reference to DER] is in the Certificate Enrollment API, not in Windows apis.
[[Category: Standard]]
[[Category: Identifier]]