Proceedings of Workshop on Software Security Assurance Tools, Techniques, and Metrics
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LZ Based Compression Benchmark on PE Files Introduction LZ Based
LZ based compression benchmark on PE files Zsombor Paróczi Abstract: The key element in runtime compression is the compression algorithm, that is used during processing. It has to be small in enough in decompression bytecode size to fit in the final executable, yet have to provide the best compression ratio. In our work we benchmark the top LZ based compression methods on Windows PE files (both exe and dll files), and present the results including the decompres- sion overhead and the compression rates. Keywords: lz based compression, compression benchmark, PE benchmark Introduction During runtime executable compression an already compiled executable is modified in ways, that it still retains the ability to execute, yet the transformation produces smaller file size. The transformations usually exists from multiple steps, changing the structure of the executable by removing unused bytes, adding a compression layer or modifying the code in itself. During the code modifications the actual bytecode can change, or remain the same depending on the modification itself. In the world of x86 (or even x86-64) PE compression there are only a few benchmarks, since the ever growing storage capacity makes this field less important. Yet in new fields, like IOT and wearable electronics every application uses some kind of compression, Android apk-s are always compressed by a simple gzip compression. There are two mayor benchmarks for PE compression available today, the Maximum Compression benchmark collection [1] includes two PE files, one DLL and one EXE, and the Pe Compression Test [2] has four exe files. We will use the exe files during our benchmark, referred as small corpus. -
Systems Administrator
SYSTEMS ADMINISTRATOR SUMMARY The System Administrator’s role is to manage in-house computer software systems, servers, storage devices and network connections to ensure high availability and security of the supported business applications. This individual also participates in the planning and implementation of policies and procedures to ensure system provisioning and maintenance that is consistent with company goals, industry best practices, and regulatory requirements. ESSENTIAL DUTIES AND RESPONSIBILITIES: The Authority’s Senior Systems Manager may designate various other activities. The following statements are intended to describe the general nature and level of work being performed. They are not intended to be construed, as an exhaustive list of all responsibilities, duties and skills required of personnel so classified. Nothing in this job description restricts management's right to assign or reassign duties and responsibilities to this job at any time for any reason, including reasonable accommodation. Operational Management Manage virtual and physical servers with Windows Server 2003 – 2012 R2 and RHEL operating systems Manage Active Directory, Microsoft Office 365, and server and workstation patching with SCCM Manage the physical and virtual environment (VMware) of 300 plus servers Have familiarity with MS SQL server, windows clustering, domain controller setup, and group policy Ensure the security of the server infrastructure by implementing industry best-practices regarding privacy, security, and regulatory compliance. Develop and maintain documentation about current environment setup, standard operating procedures, and best practices. Manage end user accounts, permissions, access rights, and storage allocations in accordance with best- practices Perform and test routine system backups and restores. Anticipate, mitigate, identify, troubleshoot, and correct hardware and software issues on servers, and workstations. -