Quantum Cryptography Patents: Who Leads, Where the Gaps Are 2026
- One filer stands well clear of the pack. the leader holds 1,075 records against 4,003 total in scope, and the top 5 combined account for 38.0% of all records — concentration at the very top, then a long tail.
- Filing has cooled slightly from its 2023 peak. 2023 was the peak year at 549 filings, and the complete-year comparison shows 2021's 443 dropping 9% to 2024's 402 — a plateau, not a collapse, once the 18-month publication lag is accounted for.
- Claim density sits overwhelmingly in digital transmission and AI-adjacent computing. H04L covers 54.5% of records and G06N 37.5%, while semiconductor-level classes like H10N and H01L sit under 3% each — a sign of where the open ground actually is.
Filing growth compares 2021 (443 records) with 2024 (402) — 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 4,003 records in scope (CR5), not by the ranked leaders only.
What the dataset covers
This landscape draws on 4,003 published records matched against quantum cryptography and quantum cryptographic protocol language, cross-referenced with practical implementation terms such as authentication token, encryption key and qubit array. The scope spans filings from 2015 through the data cut-off of 2026-08-31, capturing both foundational quantum key distribution work and the more recent wave of hybrid classical-quantum security filings from financial services and enterprise software players alongside the expected telecom and hardware incumbents.
Because publication lags filing by roughly 18 months, the most recent one to two years in any trend chart are understated by construction — a dip in 2025 or 2026 reflects the reporting pipeline, not a slowdown in actual filing activity. The comparisons in this section therefore lean on 2021-2024, the most recent span where the data can be treated as complete.
Filing trend and technology composition
Two views of the same 4,003-record corpus: how filing volume has moved year over year, and which IPC subclasses carry the claim density.
Filing trend, 2017-2026
Annual filings rose from 158 in 2017 to a peak of 549 in 2023. The most recent complete-year comparison, 2021 (443) to 2024 (402), shows a 9% decline — read this as a plateau after rapid growth rather than a retreat, since 2025 and 2026 figures are still filling in behind the publication lag.
Technology composition by IPC subclass
H04L (digital information transmission) appears in 54.5% of the 4,003 records and G06N (AI-based computing) in 37.5% — the two dominant classes, reflecting how much of quantum cryptography prior art is framed around transmission protocols and AI-assisted key management rather than the underlying qubit hardware. Hardware-adjacent classes such as H10N (2.5%) and H01L (1.8%) are comparatively thin, which is consistent with claim activity concentrating on protocol and software layers ahead of physical implementation.
Shares are the percentage of the 4,003 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Quantum Cryptography Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about quantum cryptography patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a recent representative filing
US12278895B1 — Authentication using a knowledge factor identification transaction with challenge authentication token
Systems, apparatuses, and computer program products are disclosed for authenticating a user using a knowledge factor identification transaction with a challenge authentication token. An example method includes providing a logon request, wherein the logon request comprises a user identifier received from a user. The example method further includes receiving a challenge sequence and generating a password structure, wherein the password structure is based on a static password received from the user and the challenge sequence. The example method further includes generating a challenge authentication token comprising the user identifier, the password structure, and a client timestamp.Filed by Wells Fargo Bank, N.A., published 2025-04-15 — illustrates how financial-services filers are building authentication-layer claims that sit adjacent to, rather than inside, the core cryptographic primitives.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US7181017B1 | System and method for secure three-party communications | 1,316 |
| 2 | US20160219024A1 | Secure Dynamic Communication Network And Protocol | 702 |
| 3 | US20080272934A1 | Systems and Methods for Modifying Power Usage | 681 |
| 4 | US20180307859A1 | Systems and methods for enforcing centralized privacy controls in de-centralized systems | 626 |
| 5 | US20170243028A1 | Systems and Methods for Enhancing Data Protection by Anonosizing Structured and Unstructured Data and Incorpo… | 453 |
| 6 | US20220366494A1 | Market orchestration system for facilitating electronic marketplace transactions | 438 |
| 7 | US20190332807A1 | Systems and methods for enforcing privacy-respectful, trusted communications | 371 |
| 8 | US20230123322A1 | Predictive Model Data Stream Prioritization | 338 |
| 9 | US10572684B2 | Systems and methods for enforcing centralized privacy controls in de-centralized systems | 315 |
| 10 | US20220198562A1 | Market orchestration system for facilitating electronic marketplace transactions | 260 |
Citation counts favour older records simply by virtue of time in the corpus; treat this table as a signal of influence on subsequent filings, not a ranking of current technical importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers say about the field
Three findings that shape how a freedom-to-operate or whitespace review should be scoped in this area.
The top of the field is genuinely concentrated
The leader alone holds 1,075 records, and the top 5 combined reach 1,523 records — 38.0% of all 4,003 records in scope. That concentration thins quickly: fifth place sits at 100 records and tenth at 47, so beyond the leading handful the field is a long tail of smaller filers rather than a second tier of comparable size.
Growth has plateaued, not collapsed
Filings rose from 158 in 2017 to a peak of 549 in 2023, then eased to 402 in 2024 — a 9% decline from 2021's 443 over that three-year span. Because 2025-2026 data is still incomplete, this reads as the field settling after a rapid build-up rather than as a genuine retreat in activity.
Claims cluster on protocol and AI layers, not hardware
H04L (digital transmission) and G06N (AI-based computing) between them touch a majority of records, while device-level classes like H10N and H01L sit under 3% each. That split suggests the busiest prior art is in how keys and protocols are transmitted and managed, leaving physical qubit implementation comparatively less contested on paper.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to quantum cryptography patent landscape, with the prior art for and against each one.
Who is filing, and how fast are they moving
A single leader, a handful of established runners-up, and a fast-cooling burst of recent activity across the ranked assignees.
One filer dominates the ranked leaders
The top-ranked assignee holds more than double the combined total of the next four filers, an unusually steep drop-off for a field this size. That scale typically reflects an early, sustained filing program rather than a single burst of activity.
Recent-year filing has slowed sharply across leading assignees
The leading filer dropped to 5 records in the latest year, down 91% year-on-year, and several other major assignees show similar or steeper declines. Given the roughly 18-month publication lag, part of this is reporting delay rather than an actual stop in filing — but the direction is consistent across multiple large filers, not just one.
Co-filing is limited and mostly intra-group
Only ten co-assignee pairs appear in the dataset, and the strongest of them link an entity to its own subsidiary or a named inventor rather than to an unrelated organisation. Cross-company joint filing is not yet a defining feature of this landscape.
| Assignee | Recent year | YoY |
|---|---|---|
| Google LLC | 5 | -91% |
| Wells Fargo Bank, N.A. | 2 | -75% |
| STRONG FORCE TX PORTFOLIO 2018 LLC | 2 | -33% |
| NEC Corporation | 1 | -75% |
| Toshiba Corporation | 0 | -100% |
| Accenture Global Solutions Limited | 0 | — |
| ARQIT LTD | 0 | -100% |
| Strong Force VCN Portfolio 2019, LLC | 0 | -100% |
Where to take this analysis
The dataset points to a field with a concentrated top, a cooling but not collapsing filing rate, and thin coverage in hardware-adjacent classes.
Scope a freedom-to-operate check against the leader's portfolio
With one assignee holding over a quarter of all records, any new filing in the core protocol space should start by mapping directly against that portfolio rather than the field average.
Explore assignee portfolios in EurekaTest claim language against the under-claimed sub-areas
Thin coverage in H10N and H01L relative to H04L and G06N suggests physical qubit implementation claims face less prior art than protocol-layer claims — worth confirming before drafting.
Run a whitespace search in EurekaCommon questions about quantum cryptography patents
One assignee leads the ranked field with 1,075 of the 4,003 records in scope, well ahead of the next four filers combined. The top 5 assignees together account for 38.0% of all records, so the field is concentrated at the top but has a long tail of smaller filers below tenth place, where volumes drop to under 50 records each. This pattern suggests early movers built durable filing programs rather than the field being evenly contested.
Filing rose steadily from 158 records in 2017 to a peak of 549 in 2023, then eased to 402 in 2024 — a 9% decline from 2021's 443 over that span. Because publication lags filing by roughly 18 months, 2025 and 2026 figures in any dataset will look artificially low and should not be read as a slowdown. The honest read through 2024 is a plateau after a rapid build-up, not a retreat from the field.
H04L (digital information transmission) appears in 54.5% of the 4,003 records and G06N (AI-based computing) in 37.5%, making them the two dominant classes by a wide margin. G06F (general data processing) covers a further 20.7%. Hardware-level classes such as H10N and H01L are comparatively rare, each under 3%, indicating that most claim activity sits at the protocol and software layer rather than physical qubit implementation.
The clearest signal is the gap between protocol-heavy classes like H04L and G06N, which together touch a majority of records, and hardware-adjacent classes like H10N and H01L, which sit under 3% each. Sub-areas such as qubit-array authentication hardware and solid-state qubit gate integration show relatively thin filing density compared with core transmission and key-management claims. That gap does not guarantee an easy filing, but it does mean less prior art to design around in those specific branches.
It is concentrated at the very top and thin below it: the leading assignee alone holds 1,075 of 4,003 records, and the top 5 combined reach 38.0% of all records in scope. By the tenth-ranked assignee, filings have dropped to 47 records, and co-filing between unrelated organisations is limited to just 10 identified co-assignee pairs. That combination — a dominant leader, a short second tier, and little cross-company collaboration — is typical of a field still shaped by a small number of early, sustained filing programs.
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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.