Radiation monitoring data is very important to support the safety of nuclear installation. The data should be ensured generated and supplied by an authenticated sensor. The new sensor should apply mutual authentication to server before joint the system. This research proposes a high secure authentication protocol based on Eight Prime Number of Modified RSA Algorithm (EPNR) method as certificateless mechanism to protect authenticity and confidentiality of sensor's identity. The main advantages of the protocol are designed for simpler direct point to point connection, using one-time random keys, and implementing five-barrier data protection mechanism. Its performances in context security, running time, and Quality of Services have been compared to other models. The proposed protocol is faster 29.9 times in random key generation, 7.27 times in encryption, and 11.1 times in decryption duration, compared to the others model based on RSA scheme. It has better performances in throughput and delay time. It also has enhanced resistance to statistical, replay, and MITM attack.

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RSA is the most popular public-key cryptography. The main strength of the algorithm is based on the difficulty of factoring in a large integer number. RSA has also been applied in a system with limited resource environments like single-board computers (SBC). To ensure data security, a recommendation to use a key size longer than 2048 bits generates challenges for implementing RSA in the SBC. This research proposes an EPNR (Eight Prime Numbers of Modified RSA) method, a modified double RSA based on eight prime numbers combined with the CRT method, to speed up the random key generation and decryption mechanism. The method is implemented in a Raspberry Pi 4 Model B+. The running time and security performances of the EPNR were analyzed and compared to the other models. Compared to the others model based on the standard RSA scheme, the proposed model is faster 21.78 times in a random key generation, 9.03 times in encryption and decryption processing. The EPNR has resistance to Wiener, statistical, and factorization attacks (GNFS and Fermat). Using standard RSA in the second encryption mechanism, the GNFS is not yet effective for attacking the proposed model. The modified Fermat Factorization algorithm is more difficult and needed more extra times for factoring a large composite number into eight prime numbers correctly. The method will be useful for implementing certificates authentication and distribution of the secret key. It is very suitable to enhance more secure RSA implementation in an SBC environment.

Ionizing radiation, that exposed by radioactive material as part of the nuclear energy, has been used in some activities, such as in research and development, medical, and industries fields. The radioactive material utilization needs transportation supporting activities. Transport of radioactive material is a transfer of radioactive material from one place to another place through a public area, use inland, sea, or air transportation mode. Radioactive material is existent in public area when transportation is executing needs compliance with established radiation safety and security standards. By the reasons, it is needed comprehension and competency standards for each related stake holder on transport activities. A literature study on the development of training on the transport of radioactive material for each related stakeholder has been conducted. The competency standards should include knowledge, skills, and attitudes aspect. An identified competency standards should be expressed in to training subjects, includes introduction, radiation safety technical aspects, handling of radioactive material packaged in custom area, security technical aspect, procedures for escorting of dangerous goods, management system, emergency preparedness and response, administrative procedural, and practical session for handling of radioactive material packaged. For each training, subjects should be created detail basic competencies and working success indicators as a basic for developing of curricula, syllabus, teaching material and planning. Keywords: training, radioactive material, ionizing radiation, transportation AbstrakRadiasi pengion yang dipancarkan zat radioaktif sebagai bagian dari tenaga nuklir telah dimanfaatkan di berbagai bidang kegiatan, meliputi penelitian dan pengembangan, kesehatan, serta industri. Kegiatan penggunaan zat radioaktif memerlukan dukungan pengangkutan zatradioaktif. Pengangkutan zat radioaktif merupakan pemindahan zat radioaktif dari suatu tempat ketempat lain melalui jaringan lalu lintas umum, baik menggunakan angkutan darat, laut, maupun udara. Keberadaan zat radioaktif di area public pada saat berlangsungnya pengangkutan memerlukan pemenuhan persyaratan keselamatan radiasi dan keamanan sesuai standar yang berlaku. Dengan demikian dibutuhkan pemahaman dan standar kompetensi untuk setiap pemangku kepentingan terkait. Telah dilakukan kajian pustaka dalam rangka pengembangan silabus pelatihan pengangkutan zat radioaktif untuk pemangku kepentingan yang terkait. Standar kompetensi dimaksud harus mencakup aspek pengetahuan (knowledges), ketrampilan (skills), dan sikap (attitudes). Standar kompetensi yang teridentifikasi selanjutnya diwujudkan ke dalam mata pelatihan, meliputi pengantar materi, aspek teknis keselamatan radiasi, penanganan bungkusan zatradioaktif di kawasan kepabeanan, aspek teknis keamanan,

The use of Liquified Petroleum Gas (LPG) in Indonesia is quite high, the volume reaches 6.7 million tons per year. Indonesia currently still imports 70% of its domestic consumption of LPG, or about IDR 40 trillion. Imports of Liquid Petroleum Gas (LPG) continues to increase every year. Dimethyl ether (DME) is one alternative to renewable fuels because its availability in the country is quite abundant. When DME applied as household fuels, some components such as metals and rubber should include resistance to DME, such as stoves, rubber hoses, rubber components in regulators and tube valves. Lemigas has succeeded in developing a DME resistant stove but still not found a rubber that is resistant to DME. This research aims to find a natural rubber formula that is resistant to DME and DME / LPG mixture. The study was conducted by varying the dose of sulphur (0.5, 1.5, and 3.5 phr) using 2 types of elastomer, Natural Rubber (NR) and Nitrile Butadiene Rubber (NBR). Immersion was carried out in DME and 3 variations of the DME/LPG mixture (10/90, 20/80, 30/70). The results showed that the compound formula using natural rubber with a sulphur dose of 1.5 phr has the best resistance to DME and DME/LPG mixtures.