Freaks City

Protected Assets Official Documents Documents are secured using SM4 encryption. A unique SM4 key is derived per file and used for both encryption and integrity hashing. file_key = fetch_or_create_key(file_location) # SM4 secret key cipher_and_digest(file_path, file_key, file_location) User Passwords Passwords are stored as salted hashes based ...

Blockchain is a decentralized, tamper-resistant technology for recording data. It consists of a chain of data blocks, where each block contains transaction records and metadata. Every block connects to its predecessor through cryptographic hash functions, forming an ever-growing chain. This article walks through blockchain fundamentals via impl ...

Algorithm Comparison SHA-256 AES Hash Algorithm Symmetric Encryption Irreversible Reversible No Key Storage Required Requires Key Storage When securing passwords, hash functions are typically preferred over symmetric encryption algorithms. Hash algorithms like SHA-256 are more commonly recommended for password protection due to th ...

When building APIs, relying solely on HTTPS might not always meet specific security requirements. While HTTPS effectively secures the transport layer against eavesdropping and tampering, developers often need additional layers of protection to: Prevent unauthorized simulation of API calls. Ensure that intercepted data packets remain unreadable ...

Data Ancryption Standard (DES) Overview The Data Encryption Standard (DES) is a symmetric-key block cipher developed at IBM in the 1970s. As a symmetric algorithm, it utilizes the same key for both encryption and decryption. Although largely superseded by the Advanced Encryption Standard (AES) due to its relatively short key length, DES remains ...

Introduction Lattice basis reduction is a fundamental problem in mathematics and computer science with wide applications in cryptanalysis, post-quantum cryptography, and integer programming. As quantum computing advances, traditional number-theoretic cryptographic systems face vulnerability risks, making lattice-based cryptography an important ...