DES was in wide use until AES because of standards. The RSA libs commonly accepted in the finance industry still used DES in the three round form until AES replaced it (so 2001 is when the replacement started, I imagine some banking systems and government systems still used it post 911 and well into the 2020’s).
MIT press put out the book, so it is probably still available. Using HTTPS for everything was a huge step up in security for everyone, not least because OS updates address vulnerabilities. The RSA labs libraries were statically linked back in the 90’s, IIRC (at the very least a blob you shipped with your app.)
DES was in wide use until AES because of standards. The RSA libs commonly accepted in the finance industry still used DES in the three round form until AES replaced it (so 2001 is when the replacement started, I imagine some banking systems and government systems still used it post 911 and well into the 2020’s).
MIT press put out the book, so it is probably still available. Using HTTPS for everything was a huge step up in security for everyone, not least because OS updates address vulnerabilities. The RSA labs libraries were statically linked back in the 90’s, IIRC (at the very least a blob you shipped with your app.)