Abstract
The application of Blockchain technology has begun to be widely accommodated in industrial and business practitioner environments as a safeguard of transaction security so that now including the education sector, non-business institutions enjoy the use of this technology to support the learning process. Information on the protected Blockchain can be in the form of transactions, assets, identities, and other information packaged in digital form. Information is collected in the form of blocks that are interrelated by using the hash function as cryptographic encryption. This research uses Blockchain for online pocket money top-up transactions for students. The use of a centralized Blockchain is centralized to reduce server procurement costs, but to increase the security of transaction information, modification of each block series is carried out using the AES cryptographic approach. The results showed that the attack by inserting a Cross-Site Scripting (XSS) script if you want to know the value of the top-up transaction amount, you must be able to hack the cryptographic process. This is supported by chain validation testing to determine how many block changes have been changed.
Highlights
Blockchain is a technology that involves third parties in the process of exchanging information
The results showed that the attack by inserting a Cross-Site Scripting (XSS) script if you want to know the value of the top-up transaction amount, you must be able to hack the cryptographic process
This concept is to replace the role of third parties such as financial institutions or other institutions, but on the literal side, Blockchain technology is considered as a collection of interrelated blocks of information by utilizing the hash function as encryption in the field of cryptography [5][6]
Summary
Blockchain is a technology that involves third parties in the process of exchanging information. The research to be carried out involves financial transactions that occur in the school environment, namely with the online top-up pocket case studies. This study will modify each series of blocks by utilizing the AES cryptographic approach to better maintain the integrity of stored messages, but applied to financial transactions that occur in the school environment. The proposed research will be directed to use structured metadata, namely transaction data that occurs in the school environment, namely cases of online pocket money top-up transactions that are entered as student savings data. The proposed method in the research uses a modified Advanced Encryption Standard (AES) cryptographic combination Blockchain technology for the protection of digital pocket money to up p-ISSN 2088-1541 e-ISSN 2541-5832 transactions in a school environment. To find out the resistance of the proposed algorithm modification, the test was carried out using the attack scenario with CrossSite Scripting (XSS) and Chain Validation
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