PATENT CLAIM ANALYSIS

Application Number: 15885557
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-08
Patent Classification: ["380", "279000"]

Abstract:
Systems and methods for synchronized key derivation across multiple conditional access servers are disclosed. In one embodiment, a method for synchronized key derivation to provide playback devices with derived keys for decrypting content includes receiving a request for a first derived key that includes a first asset identifier that identifies a piece of content and a first playback position within the content, determining a first content key starting position and first derived key starting position within the content using the first playback position, where the key starting positions precede the first playback position, determining whether a first content key associated with the first asset identifier and first content key starting position is stored, retrieving the first content key using the first asset identifier and first content key starting position, generating a first derived key using the first content key and first derived key starting position, and sending the derived key.

Claim (Index 1):
A method for synchronized key derivation and distribution across multiple conditional access servers to provide playback devices with derived keys for decrypting content, the method comprising:\n receiving by a conditional access server a request for a first derived key, where the request includes:\n a first asset identifier that identifies a piece of content; and \n a first playback position within the piece of content associated with the first asset identifier; \n determining using the conditional access server a first content key starting position and a first derived key starting position within the piece of content using the first playback position, where the first content key starting position and first derived key starting position precede the first playback position; determining using the conditional access server whether a first content key associated with the first asset identifier and first content key starting position is stored in memory; retrieving by the conditional access server the first content key from memory using the first asset identifier and the first content key starting position when the first content key is stored in memory; generating by the conditional access server a first derived key using at least the first content key and the first derived key starting position; and sending by the conditional access server the first derived key in response to the request for a first derived key.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 86.0
- Lexical Diversity: 2.83929
- Patent Class: 380.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15516360', '13436930', '12840160', '13349451', '14048970']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.3574943005511438
- 35 USC 102 Novelty (BERT): 0.4918446021909906
- Combined Prediction Score: 0.3709293307151285
- Mean Citation Score: 185.8707
- Max Citation Score: 210.99925
- Similarity Product: 149.7581632847786

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

Dataset: test