Current analysis on payment security, fraud prevention, AML/KYC, and PCI DSS compliance.
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 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 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 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
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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 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 FundamentalsGoogle Cloud s 2029 post-quantum cryptography roadmap includes a technical bet that could reshape how certificates authenticate TLS connections. If you re running payment infrastructure today, the roa
Cryptography FundamentalsScope This guide examines the post-quantum security challenges for Galois/Counter Mode (GCM) when used with multiple encryption keys. If your team uses GCM in payment processing, session encryption, o
Cryptography FundamentalsIf you re implementing homomorphic encryption for payment processing or tokenization systems, you ve likely encountered noise flooding as a defense against decryption attacks. What you may not know is
Cryptography FundamentalsYour anonymous access controls work today, but they won t survive quantum computing. Lattice-based cryptographic primitives that resist quantum attacks don t easily integrate with the zero-knowledge p
Cryptography FundamentalsThe Conventional Wisdom You ve heard the pitch: distribute your signing keys across multiple parties using threshold signatures , then run those shares inside Trusted Execution Environments (TEEs). Th
Cryptography FundamentalsIf you re involved with the cryptographic components of payment systems, you ve likely heard about ARX-based S-boxes. Whether your team is exploring lightweight encryption for contactless payments or
Cryptography FundamentalsYou ve probably heard the pitch: large language models (LLMs) can now tackle theoretical cryptography, proving conjectures and advancing symmetric cryptanalysis. The Pilot, Sailor Framework uses these
Cryptography FundamentalsThe Challenge wolfSSL s hand-written SIMD assembly implementations of ML-KEM had a critical flaw: they didn t compare all the ciphertext bytes during the Fujisaki, Okamoto check. The x86-64 AVX2 path
Cryptography FundamentalsThe ciphertext side-channel attack against deterministic memory encryption is no longer just a theory. AMD SEV implementations have shown that an adversary can observe changes in encrypted memory and
Cryptography FundamentalsYour payment processor likely uses full-round AES. But somewhere in your technology stack, in a legacy integration, a vendor SDK, or a performance-optimized component, reduced-round implementations st
