IEC 62541-7:2020 RLV contains both the official IEC International Standard and its Redline version. The Redline version is not an official document, it is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.
Most OPC UA applications will conform to several, but not all, of the Profiles.
This third edition cancels and replaces the second edition published in 2015. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) new functional Profiles:
profiles for global discovery and global certificate management;
profiles for global KeyCredential management and global access token management;
facet for durable subscriptions;
standard UA Client Profile;
profiles for administration of user roles and permissions.
b) new transport Profiles:
HTTPS with JSON encoding;
secure WebSockets (WSS) with binary or JSON encoding;
c) new security Profiles:
transportSecurity TLS 1.2 with PFS (with perfect forward secrecy);
securityPolicy [A] Aes128-Sha256-RsaOaep (replaces Base128Rsa15);
securityPolicy Aes256-Sha256-RsaPss adds perfect forward secrecy for UA TCP);
user Token JWT (Jason Web Token).
d) deprecated Security Profiles (due to broken algorithms):
securityPolicy Basic128Rsa15 (broken algorithm Sha1);
securityPolicy Basic256 (broken algorithm Sha1);
transportSecurity TLS 1.0 (broken algorithm RC4);
transportSecurity TLS 1.1 (broken algorithm RC4).
e) deprecated Transport (missing support on most platforms):
SOAP/HTTP with WS-SecureConversation (all encodings).