PATENT CLAIM ANALYSIS

Application Number: 16075102
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2019-02
Patent Classification: ["725", "031000"]

Abstract:
Devices, servers, systems and methods for content protection are provided. Disclosed embodiments improve temporal granularity of controlling access to the protected content and increase resilience against attacks attempting to prevent re-evaluation of conditions of access. Enforcement of re-evaluation may be based on the receipt and/or verification of tokens. In some embodiments, re-evaluation is enforced by periodically rendering content keys required for content decryption unuseable and/or clearing content keys already in use.

Claim (Index 13):
The device as claimed in  claim 10 , the processing environment being configured to, prior to step (d), generate a session key for use by both a key encryption unit and by a key decryption unit and to re-encrypt the decrypted content key with the session key using the key encryption unit, wherein storing the content key in the key table comprises storing the content key re-encrypted with the session key in the key table,\n wherein loading the content key to the register comprises decrypting the stored re-encrypted content key with the session key using the key decryption unit and storing the decrypted content key in the register, and wherein preventing further loading of the content key comprises replacing the session key with a new session key without re-encrypting the content key, thereby preventing valid decryption of the content key stored in the content key table by the key decryption unit.

Metadata:
- Claim Count in Document: 16.0
- Percentile: 96.0
- Lexical Diversity: 1.41818
- Patent Class: 725.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['11939500', '10763865', '13476190', '12635196', '14271865']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.5391130239797816
- 35 USC 102 Novelty (BERT): 0.4761317860066352
- Combined Prediction Score: 0.5328149001824669
- Mean Citation Score: 213.258686
- Max Citation Score: 220.17807
- Similarity Product: 183.6247945013076

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