Aplicabilidade da encriptação especulativa em CPUs multicore para sistema de arquivo no espaço de usuário

Abstract

Due to the constantly growing need for security and efficiencyin accessing stored data, there is also constant search for betterstorage media that bring this warranty. Previous research has led tothe creation of libraries for parallel processing on GPU to performspeculative encryption of data. The efficiency of this method wasdemonstrated in its use in cryptographic file systems. However, theapplicability and effectiveness of these methods using only CPUs remained an open problem. In order to test the feasibility of specu-lative cryptography in computing environments with CPUs only, this work presents a library version for speculative encryption withparallel processing on multicore processors and its adaptation to the EncFS++ file system in user space. The tests carried out show con-siderable increases in throughput in the most varied environments, both physical and virtual machines, using CPUs that may or maynot support the AES-NI instruction set for encryption acceleration.