One assignee leads this landscape with 71 of the 131 records in scope, far ahead of the fifth-ranked filer at 4 records. The top five assignees combined hold 76.3% of all records, and the top ten reach 89.3%, so this is a field where a small number of chipmakers control most of the claim space. The full ranking covers 39 companies, including memory makers, processor vendors and a few infrastructure and telecom filers with narrower but relevant portfolios.

Filing activity rose sharply to a peak of 22 records in 2020, then declined to 9 by 2024 — a 53% drop across that fully published three-year window. Because patent publication typically lags filing by around 18 months, the lower counts shown for 2025 and 2026 are still filling in and should not be read as continued decline. The honest read is that the field cooled from an unusually active 2019-2021 period rather than that innovation has stopped.

The underlying search combines attestation and encryption terms — device attestation, encrypted device memory, link encryption — with accelerator-specific operational terms such as bounce buffer, memory bandwidth, multi-tenant isolation, trusted driver, performance overhead and address translation service. This targets patents that engineer trust boundaries specifically around accelerator memory and interconnects, rather than general-purpose cryptography or generic trusted-execution-environment filings. G06F and H04L are the dominant IPC classes, appearing on 71.0% and 48.9% of the 131 records respectively.