Technology Reports of Kansai University (ISSN: 04532198) is a monthly peer-reviewed and open-access international Journal. It was first built in 1959 and officially in 1975 till now by kansai university, japan. The journal covers all sort of engineering topic, mathematics and physics. Technology Reports of Kansai University (TRKU) was closed access journal until 2017. After that TRKU became open access journal. TRKU is a scopus indexed journal and directly run by faculty of engineering, kansai university.
Technology Reports of Kansai University (ISSN: 04532198) is a peer-reviewed journal. The journal covers all sort of engineering topic as well as mathematics and physics. the journal's scopes are
in the following fields but not limited to:
Data security is a fundamental parameter on communication system development. The capability of protecting and securing the information is a great essence for the growth of the data security and electronic commerce. The cryptography has a significant influence upon information security systems against the variety of the attacks, in which higher complexity in secret keys results in the increase of security and the cryptography algorithms’ complexity. The sufficient and newer cryptographic methods’ versions may helpful in the reduction of the security attacks. The main aim of this research is satisfying the purpose of the information security through the addition of a new security level to the Advanced Encryption Standard (AES) algorithm by combining it with two other efficient encryption algorithms Number Theory Research Unit (NTRU), and Improved Hill Cipher (IHC). This aim achieved by using Advanced Encryption Standard (AES) followed by improved Hill Cipher (IHC) algorithm to encrypt and decrypt text in addition to use Number Theory Research Unit (NTRU) for the encryption and decryption of the AES key. The obtained results of this research have sufficient resistance to the brute-force attacks, and that makes this system more effective. Also, these modifications of AES architecture result in enhancing the complexity degree, increasing the search space of the key, and making the cipher-message too difficult to crack by attackers.
The Bengawan Solo River is the largest river on the island of Java and flows water from the river basin area (DPS) covering an area of ± 16,100 km2 starting from the Sewu Mountains in the west-south of Surakarta to the Java Sea north of Surabaya through a ± 600 km long channel. Wonogiri Reservoir as a reservoir in the upstream area of the Bengawan Solo River with a watershed (DAS) covering an area of 1350 km2 is still operating well since 1981 as a flood control raw water supply hydroelectric power river maintenance tourism and fisheries. With a river maintenance discharge from the reservoir of 2 m3/s the amount of river pollution load in the downstream area is still quite large with the highest amount of pollutant load found in the Kajangan segmentt in September 2019 with a BOD of 103 mg / L and COD of 441.7 mg / L.-133.254.59 kg / day for BOD parameters and -555.039.07 kg / day for COD parameters. After simulating the addition of discharge to the upstream different results are obtained. The most optimal dilution discharge was found to reduce the pollution load in the downstream area to comply with class II water quality standards with the lowest discharge of 23 m3 / s for April 2019 and the highest discharge of > 150 m3 / s for September 2019 to December 2019. Efforts to rely on the addition of upstream river discharge as a diluent to reduce pollutant loads in the downstream need to pay attention to the quality of water contained in the water discharge. If the water quality at the discharge used as a diluent is not too good it will not have a big effect in reducing the pollution load
