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An Enhancement of four - square with zigzag transformation encryption algorithm based on 3D Rubiks cube principle. 6

By: Anne Lorrea L. Almerol, Jose Cyril M. Rupinta, Jamel E. Susi. 4 0 16, [, ] | [, ] |

Contributor(s): 5 6 [] |

Language: Unknown language code Summary language: Unknown language code Original language: Unknown language code Series: ; 4535246Edition: Description: Content type: text Media type: unmediated Carrier type: volumeISBN: ISSN: 2Other title: 6 []Uniform titles: | | Related works: 1 40 6 []Subject(s): -- 2 -- 0 -- -- | -- 2 -- 0 -- 6 -- | 2 0 -- | -- -- 20 -- | | -- -- -- -- 20 -- | -- -- -- 20 -- --Genre/Form: -- 2 -- Additional physical formats: DDC classification: | LOC classification: | | 2Other classification:

Contents:

Action note: In: Summary: ABSTRACT: The existing Four-Square cipher, specifically the Four-Square with Zigzag transformation encryption algorithm, serves as the foundation of this study, aiming to solve its cryptographic limitations. The existing algorithm cannot encrypt messages with numbers and special characters, the keys can be easily cracked, and when the process is repeated more than 26 times, the encrypted digraph is the same as the first encrypted digraph. This study aims to enhance the existing algorithm by transforming the 5x5 matrix, enhancing the encryption-decryption key, and improving the Zigzag transformation. The methodology employed involves utilizing a 6x6x6 cube to include uppercase and lowercase letters, numbers, and special characters. Random encryption-decrption keys are generated using the Cryptographically Secure Pseudorandom Number Generator (CSPRNG), Fibonacci sequence, Tribonacci sequence, and Linear Feedback Shift Register: Zigzag transformation is improved by employing Rubik's cube principle, CSPRNG, Fibonacci sequence, and Tribonacci sequence to randomize the cube rotation. Various tests were conducted to evaluate the enhanced algorithm. The matrix comparison test demonstrated a significant erxpansion in the character set, allowing the utilization of uppercase and lowercase letters, numbers, and special characters. The comparison of encrypted and decrypted text highlighted the enhanced algorithm's ability to revert ciphertext into the original plaintext, surpassing the limitations of nthe existing algorithm. Statistical randomness tests, including the Frequency (Monobit) and Runs tests, provided robust evidence of the randomness of the algorithm, meeting the threshold for secure encryption. The average avalanche effect of the enhanced algorithm is 52.78%, surpassing the minimum avalanche effect of a secure cryptographic algorithm. Other editions:

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Item type	Current location	Home library	Collection	Call number	Status	Date due	Barcode	Item holds
Book	PLM	PLM Filipiniana Section	Filipiniana-Thesis	QA76.9.A43 A46 2024 (Browse shelf)	Available		FT7832

Total holds: 0

Undergraduate Thesis : (Bachelor of Science major in Computer Science) - Pamantasan ng Lungsod ng Maynila, 2024. 56

ABSTRACT: The existing Four-Square cipher, specifically the Four-Square with Zigzag transformation encryption algorithm, serves as the foundation of this study, aiming to solve its cryptographic limitations. The existing algorithm cannot encrypt messages with numbers and special characters, the keys can be easily cracked, and when the process is repeated more than 26 times, the encrypted digraph is the same as the first encrypted digraph. This study aims to enhance the existing algorithm by transforming the 5x5 matrix, enhancing the encryption-decryption key, and improving the Zigzag transformation. The methodology employed involves utilizing a 6x6x6 cube to include uppercase and lowercase letters, numbers, and special characters. Random encryption-decrption keys are generated using the Cryptographically Secure Pseudorandom Number Generator (CSPRNG), Fibonacci sequence, Tribonacci sequence, and Linear Feedback Shift Register: Zigzag transformation is improved by employing Rubik's cube principle, CSPRNG, Fibonacci sequence, and Tribonacci sequence to randomize the cube rotation. Various tests were conducted to evaluate the enhanced algorithm. The matrix comparison test demonstrated a significant erxpansion in the character set, allowing the utilization of uppercase and lowercase letters, numbers, and special characters. The comparison of encrypted and decrypted text highlighted the enhanced algorithm's ability to revert ciphertext into the original plaintext, surpassing the limitations of nthe existing algorithm. Statistical randomness tests, including the Frequency (Monobit) and Runs tests, provided robust evidence of the randomness of the algorithm, meeting the threshold for secure encryption. The average avalanche effect of the enhanced algorithm is 52.78%, surpassing the minimum avalanche effect of a secure cryptographic algorithm.

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