Most specifications are nowadays available free of charge from the ITU.

wbl · on Dec 11, 2018

Oh exciting! Link please?

lmz · on Dec 11, 2018

https://www.itu.int/rec/T-REC-X.680

pdimitar · on Dec 11, 2018

Can one of you please clarify what does it mean "free" in this context?

If I want my API to alternatively use ASN.1/DER instead of HTTP for encoding/decoding its traffic, are there are any licensing / copyright dangers in doing so?

blattimwind · on Dec 11, 2018

wbl · on Dec 12, 2018

So I looked and it doesn't seem that DER is included in the free download.

userbinator · on Dec 12, 2018

The Word documents (presumably the originals) are not free, but the PDFs are --- that link is to X.680, the general overview of ASN.1 as a whole. DER itself is in X.690 which is here:

https://www.itu.int/rec/T-REC-X.690-201508-I/en