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    Fujitsu and Accenture Collaboration Accelerates Reliable Blockchain Interoperability

    Published on May 15, 2020

    KAWASAKI, Japan: Fujitsu Laboratories Ltd. and Fujitsu Laboratories of America Inc. (FLA) today announced that their collaborative endeavor with Accenture was officially approved as the project “Hyperledger Cactus” by Hyperledger, an open source collaborative effort created to advance cross-industry blockchain technologies hosted by the Linux Foundation. The companies had submitted a proposal to the community for the development of an open-source software (OSS) project for secure and reliable integration between multiple blockchains.

    Figure 1: Integrated service example by linking two blockchains

    Together with Accenture, Fujitsu Laboratories and FLA will utilize the Fujitsu Laboratories’ proprietary security technology ConnectionChain(1) to develop an infrastructure software that enables the easy development of integrated services in which multiple different blockchains work together. The companies have open-sourced the software for Hyperledger Cactus.

    “Hyperledger Cactus has moved quickly through the process of becoming a Hyperledger project thanks to the support and initial code contributions of Accenture and Fujitsu and a compelling use case,” said Brian Behlendorf, executive director of Hyperledger. “There is strong community interest in facilitating the flow of information and transactions across disparate blockchains, and Hyperledger Cactus is tackling that challenge. Now that Hyperledger Cactus is a full Hyperledger project, there will be an even bigger pool of resources and contributors driving this project forward with the aim of delivering market-ready blockchain integration technologies.”

    Background and issues

    As blockchains are difficult to modify and do not require central management, they are increasingly being used in non-financial areas such as content management and rights management. In a world where real assets are digitized and users directly trade them with each other in various applications that interact with multiple blockchains, a player is required as a starting point of trust in the interconnection. Accordingly, a common platform to protect the transparency and security of such interconnection was required, which also had a general mechanism that could connect multiple blockchain foundations. In November 2017, Fujitsu Laboratories developed a proprietary security technology ConnectionChain to safely interconnect blockchains with varying implementation methods and objectives. The software for exchanging different private coins was made freely available as an OSS. Under the new project Hyperledger Cactus, Fujitsu Laboratories and FLA will integrate the ConnectionChain technology with Accenture’s Blockchain Integration Framework to jointly develop a platform for interconnecting blockchains and further activate digital transformation.

    Overview of Hyperledger Cactus

    This project will develop the foundation for a new architecture that will eliminate differences such as the timing of transactions between multiple blockchains, enabling asset transfers and recovery from transaction errors. The new open source technology aims to create a modular, extensible system that will enable integration, communication, operations and transactions between different blockchains.

    The companies will also offer a Software Development Kit(2) as an OSS to easily offer services that integrate multiple blockchains for software developers.

    For example, by applying the infrastructure of Hyperledger Cactus in car-sharing services, a new service can be created in which a driver can temporarily use a car in exchange for transferring private coins, while linking a car-sharing service blockchain that manages the rights of car usage, with a blockchain handling private coins (Figure 1). Unlike conventional blockchains, which cannot integrate different blockchains or get excess money back from remitted coins, the Hyperledger Cactus framework automatically links different blockchains. Moreover, the technology can monitor the results of such operations, enabling the rapid development of integrated services that combine multiple blockchains.

    Future Plans

    With Accenture, Fujitsu Laboratories and FLA plan to develop an infrastructure software that will integrate different blockchains to securely and reliably work together while making these now available as OSS for Hyperledger.

    (1) ConnectionChain Fujitsu Laboratories’ proprietary security technology that enables safe interconnection between different blockchains and ecosystems via blockchain technology.
    (2) SDK (Software Development Kit) Development tools and libraries used by software engineers.

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