Prior Art (Score 2, Informative)

The main ingredients of this "patent" seem to be using a cookie for structured data to avoid DB overhead, with the inclusion of some internal "checksum/session" keys.

The HSBC Australia online trading platform publicly launched in Nov 1999 and implemented in Python, used cookies to pass serialised Python structures between client and server to avoid needless per request DB lookups (and to allow simple horizontal scaling, since instead of requiring a "session DB" one only required HTTP servers capable of decrypting the cookie data, i.e. the requests could go to any server). The serialised Python structures were strongly encrypted and contained internal session key info which was used to provide an additional check on the data consistency. This would appear to match exactly what this patent claims to be novel (it seemed pretty intuitive at the time). The system is still live, and the codebase is largely untouched. I would expect that a large amount of internal documentation exists on the history of this project (including at least one presentation to an Open Source conference).