S-Neat-Kers is a shoe-washing service firm with troubles. S-Neat-Kers is a freshly created SME with problems. The issue at hand is how to acquire new potential clients while still retaining old ones. It is hoped that by creating an e-Business system based on CRM, the company's challenges would be solved. It begins with an analysis based on the CRM phase, followed by the design and development of e-Business applications utilising UML tools. The system is implemented when the application's design and development are completed. Based on the implementation findings, an implementation study was conducted to assess the design's applicability for the company's challenges. As a result, it can be inferred that the application's capabilities can assist businesses in gaining new consumers and increasing sales, as well as processing customer data that can be utilised to retain existing customers, thanks to data that is now held by the business.

In the public key infrastructure, the certification authority is fully trusted, and the security of the public key infrastructure depends on the trust of the certification authority; however, recent attacks and corruption on the certification authority indicate that the certificate is forged when the certification authority fails . New solutions, blockchain-based public key infrastructure products and registry can repair vulnerabilities in public key infrastructure, especially weaker security systems. Proposals for infrastructure-based public key infrastructure. Public keys are still the target of global attacks. According to the registration of the target victim, it is signed as a temporary public key infrastructure based on the blockchain. High growth rates require permission to use the wallet. To solve this problem, this document introduces an integrated and responsible system for managing security certificates at the transport layer that represents the next generation of public key infrastructure.I merged two new architectures, introduced a new process, and created a registration and CA server. The domain owner has been notified. In supply chain management, the domain certificate signed by the CA is stored on the registration server, and the certificate server and the CA registration server are forwarded to the group that owns the domain. Compared with existing supply chain public key infrastructure products. The above-mentioned blockchain-based public key infrastructure scheme and registry are used for security and governance analysis.

Tujuan kegiatan ini adalah sebagai bentuk perhatian dalam membantu mengurangi berat badan pada manusia dan memberi mereka sedikit kegembiraan dan senyuman dengan membantu mereka dengan murah hati di tengah wabah COVID-19 dengan pemberlakuan Pembatasan Sosial Berskala Besar (PSBB) di BSD, terutama di dalam lingkungan perumahan BSD ini. Ketertarikan ini dituntaskan melalui penggabungan dari uang yang telah dikumpulkan dari beberapa orang dengan mengaplikasikan dalam bentuk makanan kotak dengan minimal konversi Rp 250.000. Hasil dari pengumpulan kisaran harga memperoleh 50 Makanan Kotak. Tahapan dalam kegiatan adalah dimulai dari pencarian penerima makanan.  Tahap  kedua  adalah  dengan  membagikan pada sasaran penerima makanan terdiri dari ojek online, pemulung, dan pengemis. Kegiatan ini dimulai pada bulan Mei 2021.

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