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INTRODUCTION:
In this fast moving world, Technology plays a vital role in enhancing the standard of humans. There are various technologies within logistics and supply chain management with their developing trending innovations which built an new era to the modern supply chain. Among various technologies blockchain is one of the most trending one’s in recent times according to DHL Trend Radar.
Blockchain is a technology that allow authenticated data communication between each player in a supply chain without a intermediation of a trusted central organisation. By verifying and adding data in real time, blockchain can increase transparency across a supply chain. According to Bank of England, a blockchain is “a technology that allows people who don’t know each other to trust a shared events of records. Blockchain is made of a “chain” of information-storing “blocks” where each block contains information such as transactions made, amounts, and parties involved. Blockchain retains the history of all assets and instructions executed since the very first one. Blockchain simply means decentralized network. The history of blockchain is from the 90′. But blockchain came into existence in the recent times. The below figure1 explains the history of blockchain.

Figure1: A history of blockchain technology. SOURCE: Accenture(2018)
BENEFITS OF BLOCKCHAIN IN RETAILERS:
The transformation of blockchain comes through the combination of different features and characteristics. They are data transparency, security, asset management and smart contracts.

DATA TRANSPARENCY:
Data transparency ensures that the stored records are accurate from trusted source. Instead of maintaining multiple copies of data, each stake holder receives a access to shared data with a single source of trust which gives accurate and reliable data.

SECURITY:
Customary records normally give a sweeping layer of security which, once ruptured, enables access to all put away information. In a blockchain-based framework, the security instruments ensure that individual exchanges and messages are cryptographically signed. This guarantees fundamental security what’s more, powerful hazard administration to handle the present high dangers of hacking, information control, and information bargain.

ASSET MANAGEMENT:
Blockchain innovation can be utilized to deal with the possession of computerized resources and encourage resource exchanges. For instance, it very well may be utilized to track the responsibility for (e.g., arrive titles and precious stone declarations) furthermore, rights (e.g., copyright and mineral rights). It can likewise be utilized to deal with the computerized twin of a physical question in reality.

SMART CONTRACT:
Manual procedures that are regularly guided by legitimate contracts can be robotized with a kind of self-executing PC program called a keen contract. A shrewd contract is a segment of a blockchain-based framework that can naturally implement partner concurred principles and process steps. Once propelled, keen contracts are completely self-ruling; when contract conditions are met, pre-indicated and concurred activities happen consequently. These capacities can be conveyed crosswise over two sorts of blockchain-based framework: open permission less blockchains where anybody can take an interest (e.g., the bitcoin arrange).

Considering these characteristics retailers are encouraging and ensuring Ethical, Sustainable consumption. Blockchain innovation is being connected by retailers and shopper merchandise producers to drive reasonable and dependable business. For instance, it is enabling customers by giving more data about how everything was created, especially recognizing whether an item has been morally and economically sourced. In the UK, the mold creator Martine Jarlgaard is working together with Provenance and different accomplices in a experimental run program that makes mold supply chains completely straightforward. This arrangement supports and empowers purchasers furthermore, retailers to purchase merchandise from design supply chains in which every partner sticks to moral and practical business hones. Clients can look into a piece of clothing’s supply chain history on the blockchain-based framework by checking its QR code or NFC-empowered mark with a cell phone application. Expanding on this effective test case program, Provenance is presently progressing in the direction of an open traceability convention. This would enable anybody to track the place of source for anything, from espresso beans to a move of texture, and ideally quicken the development towards feasible utilization.

Figure2: Increasing transparency in fashion supply chains, SOURCE: Provenance

Another case of moral sourcing is from Everledger in the UK. Everledger is building up a blockchain-based framework to give anchored evidence of beginning and moral sourcing for high-esteem merchandise, for example, precious stones, wine, what’s more, even compelling artwork. It utilizes blockchain to store an advanced record for many valuable merchandise. For precious stones, this framework would supplant the defective paper-based confirmation
process as of now utilized by precious stone providers, mediators what’s more, purchasers. Not at all like paper records which might be fashioned or then again lost, blockchain records are perpetual. Ever ledger accomplishes this by making an advanced thumb-print for each
singular precious stone. This advanced thumb-print contains one of a kind identifier that comprise of more than 40 metadata focuses, the precious stone’s four Cs (shading, clearness, cut, and carat weight) and also the testament number which can be laser engraved on the physical precious stone whenever required. This thumb-print is at that point made obvious and put away with all members on the blockchain-based framework

Figure3: Ethical sourcing of diamonds using blockchain; SOURCE: Altoros/Everledger

BARRIERS IMPLEMENTING BLOCKCHAIN:

LINKING DIGITAL TO PHYSICAL:
Radiofrequency ID (RFID), 2D scanner tag, and close field correspondence (NFC) are utilised today to link to physical item. In any case, to guarantee stream of data, all means of the store network and all items should be labelled carefully, requiring an upgrade in the present store network hones.

CONTROL, SECURITY AND PRIVACY:
While arrangements exist, including private or permissioned blockchain what’s more, solid encryption, there are still cybersecurity rupture worries that should be tended to before the overall population will depend touchy information to a blockchain arrangement.

INDUSTRY ADOPTION:
Blockchain has the potential to deliver vast savings by improving operational efficiency and generating value through new business models. However, as with many emerging technologies, considerable challenges must be overcome before blockchain can achieve mainstream adoption in all industries. Gaining industry adoption is the most critical challenge and this will determine the success of blockchain technology in logistics. Being able to accurately and safely exchange information within a community is a key advantage of blockchain and stakeholders benefit the most when their community contains many relevant members. Therefore, similar to Facebook, the value of the community increases when it is adopted by a growing number of relevant stakeholders. A powerful network effect is triggered in the supply chain when stakeholder adoption reaches a critical mass. As more and more supply chain stakeholders participate, blockchain becomes more valuable, evolving into an industry practice. However, it will be difficult at first to obtain stakeholder commitment because of differing levels of digital readiness and the initial requirement to recognize the mutual benefits of blockchain-based collaboration. This will be particularly tricky when there are legacy processes, regulations and laws governing various aspects of the business, as stakeholders will incur cost to migrate from legacy systems and integrate with new systems and practices. Another challenge is the development of standards and governance of blockchain in each industry. There will probably be not just a single blockchain-based system in the logistics industry; instead, there will likely be multiple private permissioned blockchains due to the competitive nature of business. And of course, in future there will be multiple public blockchains. Organizational bodies will be required to determine standards and agreements, especially in the context of interoperability between blockchains. To tackle this challenge, the first blockchain consortia are now beginning to emerge; for example, the Blockchain in Transport Alliance (BiTA) in the logistics industry. It is necessary to make progress with blockchain technology itself in order to overcome current technical limitations. This is especially required for companies moving from a pilot implementation to full-scale deployment. For example, some blockchain implementations have been known to scale poorly and suffer from high latency although new innovations are being developed to address these scalability and performance issues. In some specific applications (such as large-scale, public cryptocurrency networks) there are issues with energy consumption and computing power requirements. These obstacles will need to be addressed for blockchain to reach maturity. Organization and culture play a significant role in the success of digital transformation in any industry. Particularly with blockchain technology, this cannot be overlooked as its adoption will require a collaborative mindset to engage with a large number of stakeholders.
CULTURAL ADOPTION:
Supply chain layers and partners Achieving consensus to implement blockchain in supply chains with multiple layers and more partners involves considerably more stakeholder engagement. Managers, particularly those in IT functions, must gain blockchain expertise to proactively push organizational exploration and, if applicable, adoption of blockchain-based solutions. Incentives and openness of sharing between the partners determine the risk, feasibility, and value of using blockchain. Blockchain can be an effective solution where there is a lack of central agency of trust. Blockchain speaks to a critical move to a decentralized system, which requires the up-front investment of its clients and administrators.Companies should therefore embrace concepts of collaboration and coopetition in order to derive the greatest benefits from a blockchain transformation. While there are many hurdles to overcome, these challenges with blockchain are not insurmountable. Already this technology, despite its relative infancy, is showing promise across a wide range of industries including citizen services, retail, life sciences and healthcare, automotive, manufacturing, energy, and logistics.

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