Authentication Of Transaction Process In E-marketplace Based On Blockchain ​​ technology

The very rapid development of technology is currently causing a revolution digital and the era of technological disruption or known as industry 4


Introduction
The development of technology [1] is very rapid at this time led to the digital revolution and the era of disruption technology or known as industry 4.0.with the presence of industry 4.0 [2] this happened computer growth and record automation in all fields.With technological developments in Industry 4.0 that exist today allows all activities to be carried out through the internet, starting from daily activities, education, to the process buy and sell.One influence of Industry 4.0 is Marketplace, Marketplace itself is online media website-based where activities are conducted business one of which is in the process of transactions between sellers and buyers.[3] [4] E-marketplaces are also able to provide a great opportunity for MSMEs to overcome problems costs and limitations of experts in use information Technology.[5]  Pandawan E-Marketplace is a local startup engaged in the provider of manufacturing services Open Journal System, in the transaction process Pandawan has already implementing payment processes online.However, the low level of internet security [7] is currently becoming a challenge for the Pandawan Marketplace maintain customer confidence in the company, then needed a security technology that is capable maintain transaction processes that are running on the Marketplace Pandawan, so as to create relationships good trust between buyer and seller.From the existing problems, technology is needed which is able to maintain security in the transaction process.cryptographic technology and internet protocols such as blockchain is one technology that can be used in transaction processing protection.Blockchain is a block data that are interconnected so that it looks like a chain [8], Blockchain also has a technological meaning that resembles ledgers that are safely distributed with use a consensus process to resolve a transaction [7].With the application of blockchain technology on transaction process in the Marketplace, is expected to be able to increase buyer confidence in the process transactions directly through the internet, so you can good relationship management is established between the seller and buyers, and this trust is guaranteed not only by company but also supported by collaboration between cryptography as well as smart code.

Literature Study 2.1. Blockchain
Blockchain was first introduced by Satoshi Nakamoto in 2008 [9].Blockchain is the basis data that is distributed and does not require central authority or can be said to be a transaction process without the need verification from third parties [10].Blockchain also has meaning as a decentralized transaction database so able to record events, notes and record activities in a safe, transparent and efficient system [9].Technology blockchain has the following characteristics [11] [10].
1. Decentralized.This means that every control is not has absolute authority but rather run decentralized.2. Data transparency and ease in data auditing.Each user / node is connected into a blockchain network has full copy of the (public) blockchain, starting from the genesis block to the current block.3. Information distribution.To avoid centralized data storage Each user / node save a copy of the blockchain.4. Decentralized consensus.Every transaction which is recorded into the blockchain is verified by each user / node that is connected in the network Blockchain.This broke the paradigm consumer centralization.5. Authentication.Blockchain is resistant to damage both intentional and deliberate manipulation intentionally by irresponsible parties.

E-Marketplace
An e-marketplace is an online trading site that is managed by one party, but the product and information are provided by a seller from a third party.

Customer Relationship Management
Customer Relationship Management or also called customer relationship management is an important concept in modern marketing [12].A broader definition of CRM is a strategy that is broadly applied to help manage relationships or interactions between companies and customers, clients and sales prospects, by utilizing the use of technology to organize and organize, automate, and adjust business processes, specifically in the sales process, including marketing, customer service, technical support, by building a customer interface and feedback management.[13] [14]

Transaction Security System
Transaction security system is an attempt to prevent and detect unauthorized transaction systems.With a transaction security system, data can prevent access by parties who have no rights, and avoid deleting and changing data from parties who have no rights.And able to limit access rights to certain people.[15]

Type of Transaction Security System
There are 2 types of security systems used in the online transaction process, namely: [16] 1. Cryptography System This system uses a collection of lift or often also called a key.This system functions as an introduction to users and protects all customer transaction information.

Firewall System
This system is used to prevent parties who do not have permission / access rights to enter an area that has been protected in a central work unit in the company.Firewall system is not able to prevent the entry of viruses into a system, and this is purely an obstacle from within the organization.

Literature Review
There have been many previous studies on Blockchain and Customer Relationship Management, as well as several previous studies that were used as references in making this journal, including: 1.This research was conducted by Ovi Dyantina, et al (2012) entitled "The Implementation of Web-Based Customer Relationship Management (CRM) (Case Study on Marketing Information Systems at YEN-YEN Stores)".in this study the From the 6 (six) Literature Review described above, many studies have discussed Customer Relationship Management and Blockchain technology.So from previous studies that will be used as a reference by the author in conducting scientific research under the title "Customer Relationship Management in the Authentication of Transaction Processes on the Blockawan E-Marketplace based on Blockchain Technology".

Findings 3.1. Problem Analysis
Pandawan's e-marketplace is a digital startup under the auspices of Alphabet Incubator, Pandawan E-commerce is engaged in providing open journal system services to educational institutions, associations, and organizations that want to become journal publishers.
Pandawan itself has collaborated with various associations such as the Indonesian Private Universities Association (APTISI) and the Indonesian Lecturers Association (ADI). in the transaction process, Pandawan has implemented online payment, to maintain security in the transaction process, a technology that is able to maintain the security of transaction data is needed.By maintaining the transaction process, it is expected to be able to maximize customer relationship management in increasing customer trust in the company, so that the relationship between the customer and the company can be maintained properly.

Problem solving
blockchain technology is one technology that can be used to maintain the transaction process.As explained earlier, Blockchain is a ledger that is securely distributed using a consensus process to complete transactions.The use of cryptocurrency or digital currency as a substitute for the original currency based on blockchain technology is able to help customers make transactions directly or peer-to-peer, but still able to maintain customer confidence in the company because in the process of accessing transaction data, cryptographic or smart code is needed.Peer-to-peer transactions themselves mean that ledgers are not centralized or not held by one party, but are decentralized or distributed to all users who make transactions.Besides this blockchain technology helps companies not to rely on one server or third party, because the recording of the transaction has been distributed to all parties, which are then stored in blocks that can only be accessed by using cryptography.So as to avoid various forms of fraud, such as data manipulation from third parties or data loss due to hacking or server down.This Blockchain technology is guaranteed to be more secure than the current computer system, because all transactions that occur are transparent and decentralized causing data to be able to be checked by users in the network so that reliability can be Authentication Of Transaction… ■ 72 Marketplace as well supported by current technological advances allows anyone able to do transactions without face to face, or process transactions online.

Figure 2 .
Figure 2. Schema of the E-Marketplace Evolution Stages.

Figure 3 .
Figure 3.The transaction process on the Blockchain.