Debasish Ray Chawdhuri

Indian Institute of Technology Bombay | IIT Bombay ·  Department of Computer Science & Engineering

Blockchain technology has found application outside of cryptocurrency in recent times. The development of patient-centric storage of medical records on a blockchain has recently gained momentum. However, there have been few developments in providing a solution towards giving up full control to the public so that the concentration of power by only a...

Recently, the privacy of blockchain transactions has taken center stage. Privacy is an essential feature of crypto-transactions. We have seen privacy-preserving cryptocurrencies like Monero with Cryptonote protocol and Zerocash with Zk-SNARKs. However, the privacy of transactions comes at the cost of the transactions not being visible at all to any...

Disclosed is a storage efficient multi-key sharding approach for use in a data management system. The data residing on the data management system can be partitioned based on multiple columns independently of one another, thus providing faster querying on each of the columns used for partitioning. The more partitioning attributes other than the key...

Tor, aka ‘The Onion Router’, is a protocol that allows anonymous browsing of the web in the sense that the network address of the client is not known to a single relay or even relays provided by the same provider. The relay that knows the target does not know the source and vice versa. However, the current Tor relays are voluntary and unpaid, doing...

This article provides a quick introduction to quantum annealing from a programmer's point of view at the abstraction level of QUBO. Although there has been a fair amount of literature on quantum annealing, there is a lack of material on how to think about modeling practical problems into QUBOs.The article then describes why quantum annealing still...

Fourier analysis and Fourier transform are essential cornerstones of many scientific and engineering fields of study. Accordingly, there is a plethora of literature on Fourier analysis and Fourier transform. However, it is still an elusive topic at the intuitive level. In this article, we try to provide a very intuitive derivation of discrete Fouri...

In recent times, many blockchain solutions have been proposed for automatic electronic contracts on a blockchain. The most prominent example of it is Ethereum smart contracts. In many cases, it is necessary to be able to sign contracts involving things in the physical world that are not represented in the form of crypto-assets. Such a contract can...

Blockchain technology has found application outside of cryptocurrency in recent times. The development of patient-centric storage of medical records on a blockchain has recently gained momentum. However, there have been few developments in providing a solution towards giving up full control to the public so that the concentration of power by only a...

Blockchain has currently emerged as the way of recording financial transactions on a distributed system with some adversarial nodes. Since its popularity, it has been considered whether the same or similar system can be used for storing other information. This article proposes a way of storing medical records on a blockchain. Medical records must b...

Zero-knowledge proofs are used in many cryptographic protocols. We provide a zero-knowledge proof for linear dependence of point-tuples on an elliptic curve that we would later use in multiple protocols.