## 3 MuReQua Decentralized Storage and Security Engine (MuReQua DeSSE)
### Other Details About the Uploading Section
\begin{table}
\begin{tabular}{c c c} \hline
**File Size** & **Range for n** & **Range for m** \\ \hline \(\leq\)1 KB & 0 \(\leq\) n \(\leq\) 20 & 5 \(\leq\) m \(\leq\) 15 \\ \hline 1 KB \(\leq\) size \textless{} 100 KB & 20 \(\leq\) n \(\leq\) 70 & 10 \(\leq\) m \(\leq\) 20 \\ \hline 100 KB \(\leq\) size \textless{} 1 MB & 25 \(\leq\) n \(\leq\) 100 & 10 \(\leq\) m \(\leq\) 50 \\ \hline 1 MB \(\leq\) size \textless{} 10 MB & 275 \(\leq\) n \(\leq\) 350 & 10 \(\leq\) m \(\leq\) 30 \\ \hline 10 MB \(\leq\) size \textless{} 100 MB & 2500 \(\leq\) n \(\leq\) 3000 & 5 \(\leq\) m \(\leq\) 15 \\ \hline \end{tabular}
\end{table} 
Table 2: The random number n of the first fragmentation and the random number m of the second fragmentation with respect to the file dimension are reported. approach avoids storing the mapping between the initial file and the fragment allocations in a specific location or database. Subsequently, the complete fragment is encrypted again with AES-256. At this point, the fragment is ready to be allocated and is placed in the previously described position in the tree. With reference to point 5, to enable file restoration, it is necessary to store information from which the system will initiate the recovery. With the presented solution, it is sufficient for this information to contain the IP address and the position of a fragment chosen randomly among the n \(\times\) m fragments. This information can be stored on any server, including server 0, which is different from server 1 and the considered server/storage, to increase the difficulty for a malicious attacker by decentralizing even this additional and separate information from the fragments. In any case, this information is also encrypted with the user's ID using SHA-512. The SHA-512 hash of the user's ID is then used as the key for the AES-256 encryption of the informational file, associated with the fragment chosen randomly among the n \(\times\) m fragments from which the restoration will start. Now, let us present functional mapping in relation to the physical deployment. Additionally, we consider the logical architecture for uploading processes. Below, we present the logical architecture in Figure 2 for uploading. Figure 2 describes the logical architecture of the file upload process, starting with the user transferring a file through a client. The file is converted into a byte array, fragmented, and encrypted before being sent to the central server. This server performs decryption, base conversion, and a second encryption before transmitting the data to local server 1. Here, another cycle of decryption, fragmentation, and encryption occurs. Finally, local server 1 implements proprietary encryption and a fourth encryption, then splits the data into fragments that are distributed and stored across multiple storage units. This process emphasizes data security through multiple layers of encryption and a distributed storage approach to optimize data reliability and availability. To complete the fundamental characteristics of our solution, we need to delve into the final block of the conceptual architecture, namely, block 6 in Figure 1. This block addresses the crucial aspects that make the presented solution crypto agile, thanks to the introduction of two post-quantum elements: quantum reallocation and quantum recombination. Given the cognitive complexity of this conceptual block, which includes elements of Quantum  
Figure 2: Description of the logical architecture of the upload process. Mechanics, we have decided to include its content in the specific subsequent Section 3.3 to make the reading experience more manageable. While we do not presume to offer a comprehensive review of the Quantum Computing aspects utilized, as such a discussion would require extensive treatment and stray too far from the focus of this article, in Section 3.3, we have introduced the essential elements necessary for understanding the computational complexity underlying the innovative solution developed.