Comparative Analysis of Symmetric Cryptographic Algorithms for Varying Text File Sizes | Chapter 6 | Mathematics and Computer Science: Contemporary Developments Vol. 4

 

This research aims to investigate five different symmetric algorithms: AES, DES, 3DES, Rijndael, and RC2. The primary objective is to identify the most suitable algorithm for encrypting text files of varying sizes and to promote a positive cryptographic culture for text file security.

 

Each algorithm is evaluated based on its performance in encrypting and decrypting text files of different sizes, specifically 10 KB, 20 KB, 50 KB, 1 MB, 2 MB, and 5 MB. The study focuses on measuring the time duration each algorithm requires for these processes. While numerous encryption algorithms can secure computerized information across different organizations, the time efficiency of each algorithm varies with the size of the text file. Some algorithms perform optimally for small files, while others are more suitable for larger files.

 

In this study, five symmetric algorithms are integrated into a single program using object-oriented programming concepts such as classes and inheritance. The program automatically selects the appropriate encryption algorithm based on the size of the text file to be encrypted. The file size remains stable before and after encryption, ensuring the same process is applied during decryption. The encryption and decryption code is developed using Visual Studio 2013, and the results are analyzed using the R programming language.

 

The encrypted text, or ciphertext, is represented in UTF-8 format, where "UTF-8" stands for Unicode Transformation Format, with "8" indicating that each character is represented by 8 bits. The file sizes are measured in kilobytes (KB). The performance analysis prioritizes smaller text files and arranges the algorithms in ascending order of their suitability: AES, 3DES, DES, RC2, and Rijndael. AES is found to be most effective for small text files, while Rijndael is more suitable for larger text files.

 

Author (s) Details

Allajabu Dafalla Khamis
College of Computer and Information Science, Faculty of Graduate Studies, Alzaem Alazhari University, Khartoum, Sudan.

 

Saad Subair
College of Computer Studies, International University of Africa, Khartoum, Sudan.

 

Please see the book here:- https://doi.org/10.9734/bpi/mcscd/v4/1704

Acute and Sub-acute Stent Thrombosis after Emergency Percutaneous Coronary Revascularization with Drug-eluting Stents: A Prospective Observational Study of Incidence, Predictors, and Outcomes| Chapter 9 | Perspective of Recent Advances in Medical Research Vol. 5

 This phase aimed to decide acute and sub-severe Stent thrombosis (ST)  occurrence, predictors, and outcomes following in position or time primary percutaneous coronary invasion (PCI).Patients who had sustained primary PCI at a tertiary care cardiac center were contained in this potential observational study. All subjects were followed up on 30 days after their beginning hospitalization to visualize if they developed severe or subacute ST.An aggregate of 1756 patients were included accompanying 79% (1388) male patients and mean age was 55.59 ± 11.23 age. The findings presented that the incidence of ST was 4.9% (86) with 1.3% (22) severe and 3.6% (64) sub-severe. ST was categorized as positive in 3.3% (58) and probable in 1.6% (28). Independent predictor of ST were seen to be male common (odds percentage (OR); 2.51 [1.21–5.2]), left ventricular end-diastolic pressure ≥ 20 mmHg (OR; 2.55 [1.31–4.98]), and pre-procedure thrombolysis in heart attack (TIMI) flow 0 (OR; 3.27 [1.61–6.65]). After primary PCI, we establish a significant number of patients the one were susceptible to severe or subacute ST. Male gender, LVEDP, and pre-process TIMI flow grade can all be used to identify and manage extreme-risk patients.

Author(s) Details:

Rajesh Kumar,
National Institute of Cardiovascular Diseases (NICVD), Karachi, Pakistan.

Ali Ammar,
National Institute of Cardiovascular Diseases (NICVD), Karachi, Pakistan.

Tahir Saghir,
National Institute of Cardiovascular Diseases (NICVD), Karachi, Pakistan.

Jawaid Akbar Sial,
National Institute of Cardiovascular Diseases (NICVD), Karachi, Pakistan.

Jehangir Ali Shah,
National Institute of Cardiovascular Diseases (NICVD), Karachi, Pakistan.

Ashok Kumar,
National Institute of Cardiovascular Diseases (NICVD), Hyderabad, Pakistan.

Abdul Hakeem Shaikh,
National Institute of Cardiovascular Diseases (NICVD), Karachi, Pakistan.

Abdul Samad Achakzai,
National Institute of Cardiovascular Diseases (NICVD), Karachi, Pakistan.

Nadeem Qamar,
National Institute of Cardiovascular Diseases (NICVD), Karachi, Pakistan.

Musa Karim,
National Institute of Cardiovascular Diseases (NICVD), Karachi, Pakistan.

Please see the link here: https://stm.bookpi.org/PRAMR-V5/article/view/9145