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1. 发明授权

US09614847B2 User authentication 有权
公开(公告)号：US09614847B2
公开(公告)日：2017-04-04
申请号：US14639819
申请日：2015-03-05
申请人： Tata Consultancy Services Limited
发明人： Rajan Mindigal Alasingara Bhattachar , Shivraj Vijayshankar Lokamathe , Barkur Suryanarayana Adiga , Balamuralidhar Purushothaman , Sitaram Venkata Chamarty
IPC分类号： H04L29/06 , G06F21/31 , H04L9/08 , H04L9/32 , H04L9/30
CPC分类号： H04L63/0884 , G06F21/31 , H04L9/0866 , H04L9/3066 , H04L9/3228 , H04L9/3297 , H04L63/0838 , H04L2463/061 , H04L2463/121
摘要： Method and system for user authentication are described. The method comprises receiving an authentication code from an application server seeking authentication of the user. Further, a private key of the user is computed in real time based on a user identity (ID) of the user and a master secret key of the PKG. The method further comprises, ascertaining a verification code based on the private key of the user and a verification timestamp, wherein the verification timestamp indicates a time at which the ascertaining of the verification code was initiated. Further, the authentication code is compared with the verification code. Further, the method comprises authenticating the user based on the comparison.

2. 发明申请

US20220035951A1 METHOD AND SYSTEM FOR ENABLING PRIVACY IN AN APPLICATION USING FULLY HOMOMORPHIC ENCRYPTION 有权
公开(公告)号：US20220035951A1
公开(公告)日：2022-02-03
申请号：US17361375
申请日：2021-06-29
申请人： Tata Consultancy Services Limited
发明人： Nitesh Emmadi , Rajan Mindigal Alasingara Bhattachar , Harika Narumanchi , Imtiyazuddin Shaik , Ajeet Kumar Singh
IPC分类号： G06F21/62 , H04L9/00 , G06F21/60
摘要： The disclosure herein generally relates to the field of privacy preserving in an application, and, more particularly, to enabling privacy in an application using fully homomorphic encryption. The disclosure more specifically refers to enabling a most optimal FHE for privacy preserving for the application based on a set of constraints using a disclosed set of optimization tasks. The set of optimization tasks comprise a multi objective-multi constraint optimization task and a single objective-multi constraint optimization task, that identifies an optimal FHE library, along with an associated FHE functionality and an optimal configuration of the associated FHE functionality based on the set of constraints. The identified FHE library along with the associated FHE functionality and the optimal configuration of the associated FHE functionality facilitate optimal implementation of privacy in the applications.

3. 发明授权

US10601854B2 Comprehensive risk assessment in a heterogeneous dynamic network 有权
公开(公告)号：US10601854B2
公开(公告)日：2020-03-24
申请号：US15476436
申请日：2017-03-31
申请人： Tata Consultancy Services Limited
发明人： Shivraj Vijayshankar Lokamathe , Rajan Mindigal Alasingara Bhattachar , Meena Singh Dilip Thakur , Balamuralidhar Purushothaman
IPC分类号： H04L29/06 , H04W12/12 , G06F30/20 , G06N5/04 , G06Q10/06
摘要： Systems and methods of the present disclosure provide comprehensive risk assessment in a heterogeneous dynamic network. The framework enables ‘view’ and ‘analyses’ of complete architecture simultaneously in information view, deployment view, business view and security view. Fundamentally, data pertaining to information flow between a plurality of nodes within systems in a network is identified. One or more affected nodes or paths therebetween are identified and attack risk is computed. The graph based framework supports multiple threat models for threat evaluation. It also provides mitigation plans which will reflect reduced risk in the business view and incorporates attack tree simulations to evaluate dynamic behavior of a system under attack.

4. 发明授权

US11418323B2 Method and system for securing peer nodes in a blockchain network 有权
公开(公告)号：US11418323B2
公开(公告)日：2022-08-16
申请号：US17084800
申请日：2020-10-30
申请人： Tata Consultancy Services Limited
发明人： Habeeb Basha Syed , Rajan Mindigal Alasingara Bhattachar , Meena Singh Dilip Thakur
IPC分类号： H04L9/06 , H04L9/08 , H04L9/30 , H04L9/32
摘要： This disclosure relates generally to method and system for securing peer nodes in a blockchain network. The proposed disclosure is a robust model providing secure, scalable and efficient sharding committee reconfiguration technique where blockchain peer nodes organize themselves into each sharding committee among a plurality of sharding committees. The disclosure includes, generating a random number directory by each peer node communicating random numbers to the reference committee through leader node in the blockchain network. The reference committee initiates to reconfigure members of each sharding committee at predefined intervals. Further, a first message packet from each peer node is received by the reference committee based on which a second message packet is generated enabling each peer node of the block chain network to join one of the sharding committee. Then, a peer node qualifier parameter is computed utilizing a sharding committee reconfiguration technique to reconfigure the members of each sharding committee.

5. 发明授权

US11245709B2 Multi-verifier approach for attestation of nodes in a network 有权
公开(公告)号：US11245709B2
公开(公告)日：2022-02-08
申请号：US16153109
申请日：2018-10-05
申请人： Tata Consultancy Services Limited
发明人： Shivraj Vijayshankar Lokamathe , Meena Singh Dilip Thakur , Rajan Mindigal Alasingara Bhattachar
IPC分类号： G08B23/00 , G06F12/16 , G06F12/14 , G06F11/00 , H04L29/06 , H04W12/122
摘要： This disclosure relates generally to contract management, and more particularly to contract management in a data marketplace. In an embodiment, a system for contract management performs refactoring of a contract, during which the system extracts terms and conditions from the contract and generates a simplified view of the contract. The system further performs a requirement validation based on the contract, during which the system determines features of data entity matches requirements specified by a first party or not, based on domain specific ontologies. If the data entity features are not matching with the requirements, then the system fetches one or more relevant attributes from a list of ontologies, verifies whether the features of entity along with the selected feature(s) satisfy the requirements or not. The system accordingly generates an agreeable requirement document as output of the requirement validation.

6. 发明申请

US20210385065A1 METHOD AND SYSTEM FOR SECURING PEER NODES IN A BLOCKCHAIN NETWORK 有权
公开(公告)号：US20210385065A1
公开(公告)日：2021-12-09
申请号：US17084800
申请日：2020-10-30
申请人： Tata Consultancy Services Limited
发明人： Habeeb Basha Syed , Rajan Mindigal Alasingara Bhattachar , Meena Singh Dilip Thakur
IPC分类号： H04L9/06 , H04L9/08 , H04L9/32 , H04L9/30
摘要： This disclosure relates generally to method and system for securing peer nodes in a blockchain network. The proposed disclosure is a robust model providing secure, scalable and efficient sharding committee reconfiguration technique where blockchain peer nodes organize themselves into each sharding committee among a plurality of sharding committees. The disclosure includes, generating a random number directory by each peer node communicating random numbers to the reference committee through leader node in the blockchain network. The reference committee initiates to reconfigure members of each sharding committee at predefined intervals. Further, a first message packet from each peer node is received by the reference committee based on which a second message packet is generated enabling each peer node of the block chain network to join one of the sharding committee. Then, a peer node qualifier parameter is computed utilizing a sharding committee reconfiguration technique to reconfigure the members of each sharding committee.

7. 发明授权

US09774577B2 Device, system and method providing data security and attribute based data access in participatory sensing 有权
公开(公告)号：US09774577B2
公开(公告)日：2017-09-26
申请号：US14737605
申请日：2015-06-12
申请人： Tata Consultancy Services Limited
发明人： Shivraj Vijayshankar Lokamathe , Rajan Mindigal Alasingara Bhattachar , Barkur Suryanarayana Adiga , Meena Singh Dilip Thakur , Balamuralidhar Purushothaman
IPC分类号： H04L29/06 , H04L9/30
CPC分类号： H04L63/062 , H04L9/0847 , H04L9/088 , H04L9/30 , H04L9/3073 , H04L63/0428 , H04L63/06
摘要： Disclosed are devices, systems, and methods for securing data using attribute based data access. The data may correspond to a sensory environment, and the data is secured at the device. The device secures the data by segmenting the data into number of segments and defining an access policy, further submitting the access policy to a PKG of system for generating Access Tree having attributes at different level for accessing the data. These Access Trees are securely stored on the device using IBE mechanism. Further, the data after being secured, is uploaded to a system for analysis. At the system, an access request may be received for accessing the data. The access request further includes a request attribute, whereby the system verifies if the attribute satisfies the Access Policy. If the verification is positive, an access may be provided to the data accessor for accessing the data.

8. 发明授权

US11444774B2 Method and system for biometric verification 有权
公开(公告)号：US11444774B2
公开(公告)日：2022-09-13
申请号：US17026380
申请日：2020-09-21
申请人： Tata Consultancy Services Limited
发明人： Arun Kumar Jindal , Vasudha Kumari , Imtiyazuddin Shaik , Srinivasa Rao Chalamala , Rajan Mindigal Alasingara Bhattachar , Sachin Premsukh Lodha
IPC分类号： H04L9/32 , H04L9/08 , H04L9/30 , H04L9/00
摘要： This disclosure relates generally to a method and system for biometric verification. Conventional biometric verification method and system performs one or more computations in non-encrypted domain, thereby leading to security threats. The disclosed method includes performing computations such as enrollment and verification feature vector computation, dimensionality reduction of said feature vectors, and comparison of dimensionally reduced encrypted feature vectors to obtain matching scores indicating the extent of match therebetween between in encrypted domain using fully homomorphic encryption, thereby leading to secure biometric verification.

9. 发明申请

US20210211290A1 METHOD AND SYSTEM FOR BIOMETRIC VERIFICATION 有权
公开(公告)号：US20210211290A1
公开(公告)日：2021-07-08
申请号：US17026380
申请日：2020-09-21
申请人： Tata Consultancy Services Limited
发明人： Arun Kumar Jindal , Vasudha Kumari , Imtiyazuddin Shaik , Srinivasa Rao Chalamala , Rajan Mindigal Alasingara Bhattachar , Sachin Premsukh Lodha
IPC分类号： H04L9/32 , H04L9/00 , H04L9/30 , H04L9/08
摘要： This disclosure relates generally to a method and system for biometric verification. Conventional biometric verification method and system performs one or more computations in non-encrypted domain, thereby leading to security threats. The disclosed method includes performing computations such as enrollment and verification feature vector computation, dimensionality reduction of said feature vectors, and comparison of dimensionally reduced encrypted feature vectors to obtain matching scores indicating the extent of match therebetween between in encrypted domain using fully homomorphic encryption, thereby leading to secure biometric verification.

10. 发明授权

US09590807B2 Identity based public key cryptosystem 有权
标题翻译：基于身份的公钥密码系统
公开(公告)号：US09590807B2
公开(公告)日：2017-03-07
申请号：US14228396
申请日：2014-03-28
申请人： TATA CONSULTANCY SERVICES LIMITED
发明人： Ravishankara Shastry , Barkur Suryanarayana Adiga , Rajan Mindigal Alasingara Bhattachar , Shivraj Vijayshankar Lokamathe , Balamuralidhar Purushotaman
IPC分类号： H04L9/08 , H04L9/30
CPC分类号： H04L9/0825 , H04L9/0866 , H04L9/3013 , H04L9/302
摘要： A method for generating cryptographic parameters comprises generating a private_IGTABLE based on an Euler totient function of a composite number (φ(n)), where the private_IGTABLE includes a plurality of random numbers (x). Further, a public_IGTABLE based on the private_IGTABLE, a composite number (n), and a group generator element (g) is generated, where the public_IGTABLE includes a corresponding modular exponentiation under modulo n for each of the plurality of random numbers with g as base. Further, a public key of a user is computed based on the public_IGTABLE, an identity number (ID) corresponding to the user, and n. Further, a secret key of the user is generated based on the ID, a master private key, the φ(n), and the private_IGTABLE. Thereafter, the cryptographic parameters are provided to the user for performing encryption and decryption, where the cryptographic parameters include at least one of the ID, the public key, and the secret key.
摘要翻译：一种用于生成加密参数的方法包括：基于复合数（E（n））的欧拉方法函数生成private_IGTABLE，其中private_IGTABLE包括多个随机数（x）。此外，生成基于private_IGTABLE，复合数（n）和组生成元素（g）的public_IGTABLE，其中public_IGTABLE包括对于多个随机数中的每一个的模n的相应模幂，其中g为基。此外，基于public_IGTABLE，与用户对应的身份号（ID）和n来计算用户的公开密钥。此外，基于ID，主专用密钥，φ（n）和private_IGTABLE生成用户的秘密密钥。此后，将加密参数提供给用户进行加密和解密，其中密码参数包括ID，公开密钥和秘密密钥中的至少一个。

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