Current analysis on payment security, fraud prevention, AML/KYC, and PCI DSS compliance.
Cryptography FundamentalsWhy This Question Matters Fintech security teams are buzzing after a cryptography workshop introduced MD-Hill-SPN, a new Hill cipher. This cipher achieves full plaintext avalanche from round 1 and boa
Cryptography FundamentalsRethinking Security Standards When designing authenticated key exchange (AKE) for resource-limited devices like payment terminals, the default choice is often IND-CCA encryption schemes. The logic see
Cryptography FundamentalsWhat Happened A research team has developed a fully homomorphic encryption (FHE) scheme with chosen-ciphertext attack (CCA) security, based solely on the learning with errors (LWE) assumption in the s
Cryptography FundamentalsThe Challenge Your cryptographic infrastructure doesn t fail all at once. It erodes, attack by attack, until the theoretical becomes practical. In 2023, researchers demonstrated a practical collision
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Cryptography FundamentalsYour payment system s cryptographic tools, like hash functions and block ciphers, rely on assumptions about mathematical hardness. When these assumptions fail, so does your PCI DSS compliance. A recen
Cryptography FundamentalsDuring a threat modeling session at a regional bank, a security architect questioned whether their AES implementation was vulnerable if attackers couldn t control transaction inputs. This led the team
Cryptography FundamentalsA decade of cryptographic research has hit a practical wall. The standardized encryption schemes protecting payment channels, secure messaging, and key exchange protocols weren t designed to prove the
Cryptography FundamentalsThe Leadership Gap in Post-Quantum Migration Nearly half of organizations lack a designated leader for their post-quantum cryptography (PQC) migration, according to research from Axiad . While 75% of
Cryptography FundamentalsDeploying fully homomorphic encryption (FHE) for real-time payment verification is challenging when bootstrapping takes longer than the transaction timeout window. The ciphertext refresh operation, cr
Cryptography FundamentalsLast month at Asiacrypt 2025, researchers proposed a new isogeny-based Verifiable Random Function (VRF). Within weeks, cryptanalysts showed they could recover the complete 256-bit secret key in 30 min
Cryptography FundamentalsYour cryptographic inventory is incomplete. You know it, your CISO knows it, and the regulatory deadlines approaching 2030 don t care. The quantum computing threat isn t theoretical anymore. Quantum c
Cryptography FundamentalsThe Question at Hand Your encryption is everywhere, and you might not know where. It s in application layers, embedded in cloud services, hardcoded into network appliances, and spread across hardware
Cryptography FundamentalsMany believe that once a payment card expires, it s useless. Chip-and-PIN technology and cryptographic validation supposedly render an expired card incapable of completing transactions. So, why bother
Cryptography FundamentalsIn late 2024, compliance teams began questioning the impact of post-quantum cryptography on their signature validation processes. By early 2025, the focus sharpened on multivariate signature schemes l
Cryptography FundamentalsYou re evaluating post-quantum cryptography for your payment infrastructure. Your team has read about NTRU, ML-KEM, and lattice-based schemes. Now they re asking practical questions in Slack: Will thi
Cryptography FundamentalsYour fraud detection model needs to analyze transaction patterns without accessing cardholder data. Here s a configuration template that uses homomorphic encryption for inference workloads, allowing y
