NTRU Lattice Encryption Patents: Who Leads, Where the Gaps Are 2026
- Concentrated but not locked down. the top 5 assignees hold 33.3% of all 108 records in scope, and the top 10 hold 59.3% — a long tail of single-digit filers fills the rest.
- Filing kept climbing into 2024. the peak year on record, up 17% from 2021's 12 filings to 2024's 14, before the expected post-2024 publication lag sets in.
- Almost everything sits under one transmission class. 92.6% of records carry an H04L digital-transmission class, while AI-assisted (G06N) and hardware-adjacent classes stay in single digits.
Filing growth compares 2021 (12 records) with 2024 (14) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 108 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This landscape tracks 108 published patent families filed against NTRU cryptosystem, lattice-based encryption, polynomial-ring encryption and adjacent post-quantum cryptography search terms, spanning 2015 through the 2026 data cut-off. It captures where lattice-based encryption claims are being staked as the field moves from academic proposal toward standardised, commercially deployed post-quantum key exchange and encryption.
Filing offices skew toward the United States, with meaningful activity at the EPO, in India, through WIPO's PCT route, and in the UK and China — evidence that applicants are pursuing multi-jurisdiction protection for what is still an emerging claim space rather than a mature, single-market one.
Let an AI agent run this analysis on your own technology
Pick a task. Every answer cites the patents behind it.
Filing trend and technology composition
Two views of the same 108-record dataset: how filing activity has moved year over year, and which IPC subclasses the claims actually sit in.
Filing trend, 2017–2026
Filings rose from zero in 2017 to a peak of 14 in 2024, with 2021's 12 filings growing to 2024's 14 — a 17% increase over that span. 2025 and 2026 show far fewer published records, but that reflects the roughly 18-month publication lag behind filing date, not a slowdown in activity.
IPC subclass distribution
H04L (digital information transmission) appears in 92.6% of the 108 records, confirming this is fundamentally a communications-security field. G06F (general digital data processing) follows at 33.3%, with G06N (AI-based computing), G09C (ciphering) and smaller classes such as G06Q, A61B, H04B and H04K each present in under 10% of records — these smaller classes are where the field's edges are still being drawn.
Shares are the percentage of the 108 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Post-Quantum Cryptography — NTRU Lattice Encryption Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about post-quantum cryptography — ntru lattice encryption patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative filing and most-cited prior art
Encryption apparatus, decryption apparatus, decryption-possible verification apparatus, cryptosystem, encryption method, and computer readable medium (US20240323009A1)
The filing describes an attribute-based encryption scheme where a user secret key is generated from attribute-based encryption's own secret key together with a set of attributes matching a decryption-possible condition. The encryption key combines a standard attribute-based public key with a separate post-quantum cryptography public key, so the resulting ciphertext requires both components to decrypt.Abstract text abridged from the original filing.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US8515058B1 | Bootstrappable homomorphic encryption method, computer program and apparatus | 244 |
| 2 | US20170134158A1 | Fully Homomorphic Encryption from Monoid Algebras | 80 |
| 3 | US20220237565A1 | Systems and methods for project accountability services | 53 |
| 4 | US20020041681A1 | Speed enhanced cryptographic method and apparatus | 37 |
| 5 | US20170366358A1 | Authentication Via Group Signatures | 36 |
| 6 | US20170366349A1 | Proofs of Plaintext Knowledge and Group Signatures Incorporating Same | 36 |
| 7 | US7031468B2 | Speed enhanced cryptographic method and apparatus | 30 |
| 8 | US20210226782A1 | Quantum computer resistant pre-shared key distribution for large scale wide area network solutions | 27 |
| 9 | US11223470B1 | Post-quantum cryptography side chain | 25 |
| 10 | US20110033046A1 | Encryption device and encryption system | 23 |
Citation counts favour older, foundational filings inside this searched corpus — treat them as a signal of influence on the field, not a ranking of current commercial importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
Put your own technology through the same analysis
Eureka on the web
When you want the answer in the next five minutes.
The agent works the prompt against patents and technical literature, citing every source.
Run your analysis now →MCP server & REST API
When it has to run inside your own pipeline.
Patent search, landscape analysis and assignee resolution as MCP tools. Drop them into any agent framework, or call REST directly.
Browse MCP servers →What the numbers mean for a filing decision
Three patterns stand out once the 108 records are broken down by class, geography and filer concentration.
Leadership is real but not dominant
The leading assignee holds 8 records and fifth place holds 7 — a meaningful gap over the tail, but nowhere near a monopoly. With the top 10 combined at 59.3% of all records, there is still room for a well-differentiated new entrant to build a defensible position rather than simply licensing around incumbents.
Claims cluster on transmission, not on the math itself
Almost every record touches H04L digital transmission, meaning claims are typically drafted around how lattice encryption is applied to a communication or key-exchange flow rather than around the underlying polynomial-ring mathematics in isolation. G06N's 8.3% share suggests AI-assisted cryptanalysis or key generation is still a minor, emerging thread.
Filing strategy is multi-jurisdictional from the start
The United States leads by a wide margin, but EPO, India, WIPO/PCT, UK and China filings all appear at meaningful volume. That spread indicates applicants are treating post-quantum encryption as a global compliance and interoperability issue, not a single-market patent play.
Growth held into the last complete year
2024's 14 filings mark the highest annual total in the dataset and follow a documented +17% climb from 2021's 12. Because publication lags filing by roughly 18 months, 2025 and 2026 figures will keep rising as more records publish — they should not be read as a drop-off.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to post-quantum cryptography — ntru lattice encryption patent landscape, with the prior art for and against each one.
Who is filing, and where the field is still open
The ranked assignee list covers 51 companies across the 108 records in scope — a genuine spread rather than a two-player race, with several recent-year filers showing zero activity in the latest tracked year, consistent with the publication lag rather than withdrawal.
A modest but clear front-runner
The leading assignee's 8 records put it ahead of the field, but the margin over fifth place (7 records) is thin. No single filer has amassed the volume needed to foreclose the space on its own.
A dense middle tier
By tenth place, holdings drop to 5 records, and the top 10 together account for 59.3% of all 108 records. That leaves roughly 40% of filing activity distributed across 41 further ranked companies — a long tail typical of a field still settling its standards.
Corporate-group filing, not open collaboration
The co-assignee pairs identified in this dataset link entities within the same corporate family — a mobile carrier and its systems-integration arm, and a technology conglomerate and its regional subsidiary. This looks like internal IP routing rather than cross-company joint development.
| Assignee | Recent year | YoY |
|---|---|---|
| PQShield Ltd | 0 | — |
| NTRU Cryptosystems Inc | 0 | — |
| Lockheed Martin Corp | 0 | — |
| International Business Machines Corporation | 0 | — |
| South China University of Technology | 0 | — |
| CERTSIGN SA | 0 | — |
| Rakuten Mobile Inc | 0 | — |
| ZAMA SAS | 0 | — |
Where to take this analysis
The dataset points to a field with real leaders but no lock on the core claim space — the next steps depend on whether you are filing, licensing or tracking competitors.
Pressure-test a draft claim against the leaders
Run a candidate claim against the ranked assignees' actual filings, not just their headline counts, to see how close a new application would sit to existing language.
Explore claim comparison in EurekaWatch the white space fill in
Sub-areas like AI-assisted key generation and hybrid attribute-based schemes are thin today but will not stay that way once standards bodies finalise post-quantum requirements.
Track emerging filings in EurekaCommon questions about NTRU lattice encryption patents
It is moderately concentrated but not dominated by a single player. The top 5 assignees together hold 33.3% of the 108 records in scope, and the top 10 hold 59.3%. The leading assignee has 8 records and the tenth-ranked has 5, which means the remaining 41 ranked companies share the rest — a long tail typical of a field that is still forming rather than consolidating.
Yes, through the last complete filing year. Filings rose from 12 in 2021 to a peak of 14 in 2024, a 17% increase over that span. Figures for 2025 and 2026 appear lower in the data, but that reflects the roughly 18-month lag between filing and publication, not an actual decline in filing activity.
H04L, digital information transmission, appears in 92.6% of the 108 records, making this overwhelmingly a communications-security field rather than a pure mathematics one. G06F, general digital data processing, follows at 33.3%. Smaller classes such as G06N (AI-based computing), G09C (ciphering) and G06Q (business data processing) each appear in under 10% of records, marking areas of lighter claim density.
The thinnest classes relative to the field's overall size are G06N (AI-assisted computing, 8.3% of records), G06Q (business/commerce applications, 2.8%), and niche overlaps like A61B (medical/diagnostic use of lattice encryption, 1.9%) and H04K (jamming-resilient secret communication, 1.9%). These are areas where fewer prior filings exist to design around, though thinness can also mean the application itself is still commercially immature.
The United States leads with 44 filings, followed by the European Patent Office at 15, India at 12, WIPO's PCT route at 9, the United Kingdom at 8, and China at 7. The spread across these six offices indicates applicants are pursuing multi-jurisdiction protection early, consistent with post-quantum cryptography being treated as a global interoperability requirement rather than a single-market concern.
Research Post-Quantum Cryptography — NTRU Lattice Encryption Patent Landscape in depth with Eureka
Go past this page: query the whole post-quantum cryptography — ntru lattice encryption patent landscape corpus yourself, in your own scope.
Every answer comes back with patent numbers you can open.
Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.