Topic
Data feed
About: Data feed is a research topic. Over the lifetime, 216 publications have been published within this topic receiving 4337 citations.
Papers published on a yearly basis
Papers
24 Oct 2016
TL;DR: TownCrier as discussed by the authors is an authenticated data feed system that acts as a bridge between smart contracts and existing web sites, which are already commonly trusted for non-blockchain applications, and combines a blockchain front end with a trusted hardware back end to scrape HTTPS-enabled websites and serve source-authenticated data to relying smart contracts.
Abstract: Smart contracts are programs that execute autonomously on blockchains. Their key envisioned uses (e.g. financial instruments) require them to consume data from outside the blockchain (e.g. stock quotes). Trustworthy data feeds that support a broad range of data requests will thus be critical to smart contract ecosystems. We present an authenticated data feed system called Town Crier (TC). TC acts as a bridge between smart contracts and existing web sites, which are already commonly trusted for non-blockchain applications. It combines a blockchain front end with a trusted hardware back end to scrape HTTPS-enabled websites and serve source-authenticated data to relying smart contracts. TC also supports confidentiality. It enables private data requests with encrypted parameters. Additionally, in a generalization that executes smart-contract logic within TC, the system permits secure use of user credentials to scrape access-controlled online data sources. We describe TC's design principles and architecture and report on an implementation that uses Intel's recently introduced Software Guard Extensions (SGX) to furnish data to the Ethereum smart contract system. We formally model TC and define and prove its basic security properties in the Universal Composibility (UC) framework. Our results include definitions and techniques of general interest relating to resource consumption (Ethereum's "gas" fee system) and TCB minimization. We also report on experiments with three example applications. We plan to launch TC soon as an online public service.
603 citations
Posted Content•
TL;DR: An authenticated data feed system called Town Crier is presented, which acts as a bridge between smart contracts and existing web sites, which are already commonly trusted for non-blockchain applications and defines and proves its basic security properties in the Universal Composibility (UC) framework.
Abstract: Smart contracts are programs that execute autonomously on blockchains. Their key envisioned uses (e.g. financial instruments) require them to consume data from outside the blockchain (e.g. stock quotes). Trustworthy data feeds that support a broad range of data requests will thus be critical to smart contract ecosystems. We present an authenticated data feed system called Town Crier (TC). TC acts as a bridge between smart contracts and existing web sites, which are already commonly trusted for non-blockchain applications. It combines a blockchain front end with a trusted hardware back end to scrape HTTPSenabled websites and serve source-authenticated data to relying smart contracts. TC also supports confidentiality. It enables private data requests with encrypted parameters. Additionally, in a generalization that executes smart-contract logic within TC, the system permits secure use of user credentials to scrape access-controlled online data sources. We describe TC’s design principles and architecture and report on an implementation that uses Intel’s recently introduced Software Guard Extensions (SGX) to furnish data to the Ethereum smart contract system. We formally model TC and define and prove its basic security properties in the Universal Composability (UC) framework. Our results include definitions and techniques of general interest relating to resource consumption (Ethereum’s “gas” fee system) and TCB minimization. We also report on experiments with three example applications. We plan to launch TC soon as an online public service.
418 citations
Patent•
3 Mar 2003
TL;DR: In this paper, a spread data feed is generated in response to the market data feeds and from one or more spread setting parameters, which can be entered by a user, and displayed in a spread window as bid and ask quantities associated with an axis or scale of prices.
Abstract: The present embodiments are provided to facilitate the automatic trading of spreads in a fast and accurate manner. One or more market data feeds that contain market information for tradeable objects are received at an exchange. A spread data feed is generated in response to the market data feeds and from one or more spread setting parameters, which can be entered by a user. The spread data feed is preferably displayed in a spread window as bid and ask quantities associated with an axis or scale of prices. The user can enter orders in the spread window and the legs will be automatically worked to achieve, or attempt to achieve, the spread. In addition, other tools disclosed herein may be utilized to assist the user in making such trades.
194 citations
Patent•
5 Jan 2011TL;DR: A centralized or cooperatively distributed service may scale for improved efficiency and value, since each data feed may be monitored and each data item received and evaluated on behalf of many users.
Abstract: Data items of various data feeds (such as articles posted to a website or entries in an RSS feed) may be associated with various topics, but a user may be unable to monitor a large number of data feeds, and to avoid previously reviewed data items while searching for new data items. An aggregation service may monitor many data feeds, perform an automated topical evaluation of the data items, and generate a set of topical data feeds. Additional services may also be applied, such as filtering the topical data feeds by various criteria, translating data items from a native language into another language, and removing equivalent data items, such as articles redundantly covering the same news story. A centralized or cooperatively distributed service may scale for improved efficiency and value, since each data feed may be monitored and each data item received and evaluated on behalf of many users.
192 citations
Patent•
2 Jun 2008
TL;DR: In this paper, the authors present a system for providing accelerated transmission of broadcast data, such as financial data and news feeds, over a communication channel using data compression and decompression to provide secure transmission and transparent multiplication of communication bandwidth, as well as reduce the latency associated with data transmission of conventional systems.
Abstract: Systems and methods for providing accelerated transmission of broadcast data, such as financial data and news feeds, over a communication channel using data compression and decompression to provide secure transmission and transparent multiplication of communication bandwidth, as well as reduce the latency associated with data transmission of conventional systems.
166 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 6 |
| 2020 | 10 |
| 2019 | 11 |
| 2018 | 9 |
| 2017 | 5 |
| 2016 | 14 |