Security for sequentially growing data structures
US11329829B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Jun 1, 2019 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Nov 22, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A log, comprising a sequence of temporally ordered digital entries, is authenticated by entering a new entry into the log only after expiration of a minimum time interval. A digital signature and timestamp are generated for each entry in the log and are included in each respective entry. In a validity verification phase, the timestamp of at least one of the entries is examined to determine whether it indicates entry into the log at a time relative to a preceding entry in the log after less than an expected minimum time interval. If so, a remedial action is taken.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.