Results 91 to 100 of about 12,741,900 (205)

Image Encryption Method Based on Logarithmic Chaotic System and DNA Mutation

Mathematics
Existing chaos-based image ciphers may suffer from limited dynamical complexity in low-dimensional maps and insufficient diversification of encryption-control sequences across different encryption instances.
Ping Gao, Caiwen Chen, Tianxiu Lu, Jiahua Dong   +3 more
doaj   +1 more source

Perbandingan kinerja algoritma SHA-1, SHA-256, dan SHA-512

Fungsi hash adalah fungsi yang mengaitkan string dengan panjang sebarang ke string dengan panjang tetap. Kegunaan fungsi hash adalah untuk menjaga keaslian pesan. Penelitian ini mempelajari cara kerja Secure Hash Algorithm- 1(SHA-1), SHA-256 dan SHA-512.
Taufik Budi Nirwanto
core  

A novel medical steganography technique based on Adversarial Neural Cryptography and digital signature using least significant bit replacement

International Journal of Cognitive Computing in Engineering
With recent advances in technology protecting sensitive healthcare data is challenging. Particularly, one of the most serious issues with medical information security is protecting of medical content, such as the privacy of patients.
Mohamed Abdel Hameed, M. Hassaballah, Riem Abdelazim, Aditya Kumar Sahu   +3 more
doaj   +1 more source

Reversing Eight Rounds of SHA-256

This paper demonstrates a method to deterministically reverse the first eight rounds (iterations) of the SHA-256 compression function. By tracking the propagation of a single message schedule word through the internal state and expressing its effect algebraically across rounds, we isolate and recover its original value from the final state. The results
openaire   +3 more sources

MicroCrypt: High-Efficiency Hashing for Next-Generation IoT Devices

Proceedings of the International Conference on Applied Innovations in IT
The Internet of Things (IoT) is growing quickly and connecting more devices than ever before. This has made it more important to improve security protocols, especially cryptographic hash functions that work in places with limited computing, storage, and ...
Shatha H. Jafer Al-Khalisy, Wafaa M. Salih Abedi, Adil M. Salman, Ghada Emad Al-Kateb, Mohammed Aljanabi, Maad M. Mijwil   +5 more
doaj   +1 more source

Perbandingan Algoritma AES128 dengan SHA256 dalam Kecepatan Enkripsi Pengiriman Data

JOINS (Journal of Information System)
Internet of Things bekerja untuk menyediakan berbagai layanan yang menghubungkan sensor dengan aktuator. Pada masa sekarang, layanan IoT telah banyak digunakan diberbagai bidang.
Rina Setiani, Eldiva Tegar Imananda, Wahyu Enggar Wicaksono, Muhammad Aziz Baihaqi, Jeki Kuswanto   +4 more
doaj   +1 more source

Skyscraper: Fast Hashing on Big Primes

Transactions on Cryptographic Hardware and Embedded Systems
Arithmetic hash functions defined over prime fields have been actively developed and used in verifiable computation (VC) protocols. Among those, ellipticcurve- based SNARKs require large (256-bit and higher) primes. Such hash functions are notably slow,
Clémence Bouvier, Lorenzo Grassi, Dmitry Khovratovich, Katharina Koschatko, Christian Rechberger, Fabian Schmid, Markus Schofnegger   +6 more
doaj   +1 more source

Enhancing System Security Using Cryptographic Algorithms for Student Attendance Management

Techno.Com
Student attendance records are essential for academic administration, performance monitoring, and institutional decision-making. However, conventional digital attendance systems remain vulnerable to unauthorized access, data tampering, replay attacks ...
Derry Setiawan, Yuni Handayani
doaj   +1 more source

Efficiency Without Security Trade-off: Statistically Validated Cryptographic Hash Selection for Ethereum Fraud Detection

Journal of Applied Informatics and Computing
Cryptographic hash functions form the preprocessing layer of Ethereum fraud detection pipelines, yet prior research evaluated hash performance and fraud detection as separate concerns, leaving practitioners without evidence-based guidance for selecting ...
Ahmad Dani, Wildanil Ghozi, Ramadhan Rakhmat Sani, Fauzi Adi Rafrastara   +3 more
doaj   +1 more source

The Geometric and Algebraic Topology of SHA-256

The Geometric and Algebraic Topology of SHA-256 Markov Carry Chains, Eulerian Parity, and the Round-7 Hardness Wall   Driven by Dean A. Kulik May 2026   The standard model of cryptographic hash functions traditionally treats algorithms like SHA-256 as discrete algebraic permutations operating over finite fields.
openaire   +1 more source