PATENT CLAIM ANALYSIS

Application Number: 16374197
Application Type: Utility
Filing Date: 2019-04
Publication Date: 2019-07
Patent Classification: ["713", "180000"]

Abstract:
A method and system configured to produce a cryptographic signature on a message, under a key, at a user computer wherein the key is shared between the user computer, which stores a first key-share, and an authentication computer, which stores a second key-share and a first authentication value. The user computer encodes the message to produce a blinded message, produces the first authentication value from a user password and a secret value, and produces a second authentication value by encoding the first authentication value and a nonce. The authentication computer uses the nonce to determine if the first authentication value is correct and, if so, encodes the blinded message using the second key-share to produce a partial signature. The user computer produces a signature on the message under the key by encoding the partial signature and the message using the first key-share and an unblinding function.

Claim (Index 8):
A method for producing a cryptographic signature on a message with a first key-share and second key-share, the method comprising:\n generating a first authentication value from a user password; generating a second authentication value encoding a nonce and the first authentication value; receiving a partial signature having a blinded message encoded therein using the second key-share, according to authentication of the first authentication value using the nonce and a stored first authentication value; and producing a signature on a message by encoding the partial signature and the message using the first key-share and an unblinding function for unblinding the blinded message in the partial signature.

Metadata:
- Claim Count in Document: 50.0
- Percentile: 100.0
- Lexical Diversity: 3.11765
- Patent Class: 713.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15612584', '15970434', '14742237', '14669976', '15478867']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.4639578268554112
- 35 USC 102 Novelty (BERT): 0.5896433582239581
- Combined Prediction Score: 0.4765263799922659
- Mean Citation Score: 482.475194
- Max Citation Score: 487.59686
- Similarity Product: 458.974650520935

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

Dataset: test