The link for this post is using an archive for the article on Bloomberg's website. An archive has no paywall, no subscription requirement, and can be easier to read. The original article, on Bloomberg's website is:

Cyberattack Sends Derivatives Trading Back to the 1980s https://www.bloomberg.com/news/articles/2023-02-02/cyberattack-sends-world-of-derivatives-trading-back-to-the-1980s [Archive]