PATENT CLAIM ANALYSIS

Application Number: 15750706
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-08
Patent Classification: ["380", "044000"]

Abstract:
Some embodiments are directed to an electronic cryptographic device arranged to determine a cryptographic key. The cryptographic device can include a physically unclonable function (PUF) arranged to produce a first noisy bit string during the enrollment phase and a second noisy bit string during the reconstruction phase, and a statistical unit arranged to execute a statistical test for verifying correct functioning of the physical unclonable function. The statistical test computes a statistical parameter for the physical unclonable function using helper data. The statistical test determines correct functioning if the statistical parameter satisfies a criterion of the statistical test.

Claim (Index 10):
The electronic cryptographic device as in  claim 5 , wherein the first statistical test includes:\n for each repetition code word of the series of repetition code words, determining a Hamming weight of the exclusive-or of the repetition code word and the corresponding part of the first noisy bit string, for each Hamming weight w less than or equal to \u2514n/2\u2518 wherein n is the bit length of the repetition code word, counting the number of determined Hamming weights equal to w or n\u2212w, thus obtaining observed frequencies of Hamming weights, applying a statistical test for comparing an observed distribution to a theoretical distribution to the observed frequencies of Hamming weights and to specified frequencies of Hamming weights for the PUF, and determining correct functioning of the PUF if the statistical test for comparing an observed distribution to a theoretical distribution indicates that the observed frequencies of Hamming weights and the specified frequencies of Hamming weights for the PUF are closer than a distributional threshold.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 88.0
- Lexical Diversity: 1.90909
- Patent Class: 380.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15539900', '14360519', '13501875', '14426728', '14718017']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.4170661373288004
- 35 USC 102 Novelty (BERT): 0.5552385108997892
- Combined Prediction Score: 0.4308833746858993
- Mean Citation Score: 311.466186
- Max Citation Score: 436.1708
- Similarity Product: 308.06297323589325

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test