I remember it well. DeCSS was code, not prose. I maintain that an English description of the decryption process without the key would not be liable.

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 BF

REDACTED

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C1

https://en.wikipedia.org/wiki/Illegal_number

Even more obvious in decimal:

13256278887989457651018865901401704639

REDACTED

13256278887989457651018865901401704641

been there, done that, got the t-shirt