Patents
US 12587542 B2: Man-in-the-middle extender defense in data communications
- Granted
- 2026-03-24
- Filed
- 2024-06-28 application 18758396
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A method of determining whether a received message at a communications device is from a legitimate second device may include building a message intended for a legitimate second device, generating a time delay using a secret key known to the device and the legitimate second device, sending the built message to the legitimate second device, starting a timer at the time of sending the built message, receiving a response to the sent message, determining a response time of the received response based on a time value of the timer, determining an acceptable receive window of time based on the generated time delay, determining whether the determined response time is within the determined acceptable receive window of time, and when the determined response time is within the determined acceptable receive window of time, recognizing the received response as a legitimate message from the legitimate second device.
Source: PTBLXML, file of 2026-03-24 (ipgb20260324.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Itron, Inc. 476 patents | US company or organization | Liberty Lake, WA | ITRON, INC. Federal lobbying client EXACT high confidence: identical full name and state ITRON, INC. SEC filer EXACT medium confidence: identical full name, one of each nationally | PTBLXML, file of 2026-03-24 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Bernard M. Woodland | Cary, NC | 11 | PTBLXML, file of 2026-03-24 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| H04L | Transmission of digital information, e.g. telegraphic communication | H04L63/126 | PTBLXML, file of 2026-03-24 |
| G06F | Electric digital data processing | G06F21/44 | PTBLXML, file of 2026-03-24 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2025-09-15 | Security interest Security interest Security interest | ITRON, INC. signed 2025-09-12 | WELLS FARGO BANK, NATIONAL ASSOCIATION CHARLOTTE, NC | 72870/873 | PASDL, file of 2026-10-15 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.