Extended “Understanding Quantum Technologies 2025” on arXiv I published the 2025 edition of the ebook “Understanding Quantum Technologies” on Septem... www.oezratty.net/wordpress/2025/extended-... #PostSapiens […]
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Understanding Quantum Technologies 2025 I am happy and relieved to release Understanding Quantum technologies 2025. It is the 8th edition of... www.oezratty.net/wordpress/2025/understan... #PostSapiens #understandingquantumtechnologies #quantumcommunications […]
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Sun Yat-sen University researchers developed a distributed quantum algorithm solving the discrete logarithm problem with O(2m+n) space complexity—vs Shor's O(3m)—using iterative set intersection across QPUs, no quantum communication required.
#QuantumCryptography #QuantumAlgorithms #News
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Researchers propose a distributed quantum algorithm for the discrete logarithm problem that reduces register size below Shor's O(3m) to O(2m+n+1), improves success probability, and requires only classical communication between QPUs.
#QuantumCryptography #QuantumAlgorithms #Research
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HOM interference used to verify pulse indistinguishability in a 1.25 GHz decoy BB84 QKD transmitter. Visibility ~0.3 across all BB84 state pairs with no statistically significant differences, confirming modulation does not compromise security.
#QuantumCryptography #QKD #Research
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Anhui University researchers show just 1% measurement error invalidates quantum steering certification in 10D systems. Error sensitivity scales as O(d³), with multipartite systems even more vulnerable—demanding >99% device trust for secure quantum comms.
#QuantumSteering #QuantumCryptography #News
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QDBFT integrates QKD-based message authentication with a consistent hash ring node rotation mechanism to achieve information-theoretic security in blockchain consensus, matching traditional PBFT throughput while resisting quantum attacks.
#QuantumCryptography #BlockchainSecurity #Research
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New measured smooth Rényi divergences yield a tightened leftover hash lemma, improving all prior one-shot bounds for quantum privacy amplification and establishing the optimal second-order asymptotic expansion under trace distance security.
#QuantumCryptography #QuantumInformation #Research
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BB84-style QKD with pairwise additive masking secures federated learning for 6G tasks, achieving NMSE 0.216 & 92.1% radar accuracy—matching plain FL—while QBER-based abort blocks all eavesdropper intercept-resend attacks.
#QuantumCryptography #FederatedLearning #Research
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Three strategies for distance-adaptive CV-QKD are experimentally validated: modulation variance tuning (reach to 79km), trusted detector loss (47.7km), and rate-adaptive RL-LDPC FEC (near-asymptotic SKR across wide distance range).
#CVQKD #QuantumCryptography #Research
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Proves all star-incompatible quantum measurements can certify steering-based randomness in one-sided device-independent protocols, establishing a full equivalence and providing quantitative bounds via a new star-incompatibility weight measure.
#QuantumCryptography #QuantumInformation #Research
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Novel q-CDMA framework enables N×N multiuser CV-QKD over a shared quantum channel using chaotic phase shifters and binary-tree beam-splitter networks, deriving secret key rates under collective attacks in both asymptotic and finite-size regimes.
#CVQKD #QuantumCryptography #Research
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Injection-locked DFB lasers enable 4D time-bin BB84 QKD over 250 km fiber—a record for HD schemes—delivering 4.33 kbps at 200 km and 422 bps at 250 km, outperforming 2D encoding without external modulators.
#QuantumCryptography #QKD #Research
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Trusted noise injection in BB84 QKD improves finite-size key rates at high QBER, reducing minimum block size by orders of magnitude near the 11% threshold, but only within a limited Rényi order range (α→1 to α≃1.4).
#QuantumCryptography #QKD #Research
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Novel 4-party QKD protocol exploiting full network nonlocality achieves QBER below 13.7%, outperforming Bell-CHSH-based protocols (14.6%), by using trilocal inequality violation for eavesdropper detection in star-shaped quantum networks.
#QuantumCryptography #QuantumNetworking #Research
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4-channel FDM CV-QKD system achieves 3.7× secret key rate gain over single-channel baseline, outperforming up to 41.1 km. Dense low-symbol-rate multiplexing proves superior to high-baud single-channel approaches within shot-noise-dominant bandwidth.
#CVQKD #QuantumCryptography #Research
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A numerical SDP-based framework for QKD key rates under physically restricted eavesdropping confirms SP-BB84 gains no benefit from bypass constraints, but finds improvements with detector efficiency mismatch and weak coherent pulse protocols in satellite QKD.
#QuantumCryptography #QKD #SatelliteQKD
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Numerical analysis of BB84, SARG04, and NPAB BB84 QKD protocols using WCP without decoy states reveals SARG04 excels in high-loss channels, BB84 in noisy channels, and new NPAB BB84 outperforms both under physical misalignment.
#QKD #QuantumCryptography #Research
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A novel ε-ASU₂-based 'authentication-with-response' scheme achieves mutual QKD authentication using a single one-time key per round—halving overhead vs. state-of-the-art—with security formally established under the Universal Composability framework.
#QKD #QuantumCryptography #Research
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New research (EUROCRYPT 2026) cuts the qubit requirement to break 256-bit ECC from 2,124 to 1,098 logical qubits via space-optimized Shor's algorithm using Legendre symbol compression and RNS arithmetic, now below RSA-3072's 2,043-qubit threshold.
#QuantumCryptography #PostQuantum #News
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#Google bumps up #QDay deadline to 2029, far sooner than previously thought
arstechnica.com/security/2026/03/google-...
#cybersecurity #QuantumCryptography #cryptography #PQE
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winbuzzer.com/2026/03/25/g...
Android 17 Gets Quantum-Safe Encryption Across Full Security Stack
#Google #Android #QuantumCryptography #QuantumComputing #Encryption #Cybersecurity #PostQuantumCryptography #BigTech #GooglePlay #GoogleChrome
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Quantum Origin, the world's first commercially available quantum-computing-hardened cryptographic key solution by Quantinuum, won the 2022 'Best Use of Innovation' award from UK Business Tech.
#QuantumCryptography #PostQuantumSecurity #News
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Quantinuum's Cryptography team releases Cryptomite, a software library offering state-of-the-art randomness extractors — easy to use, efficient, and numerically precise — for cryptographic and computer science applications.
#QuantumCryptography #Cryptomite #News
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SEALSQ (NASDAQ: LAES) closes a $125M registered direct offering at $4.11/share with warrants at $5.50, led by Heights Capital Management, to fund Post-Quantum semiconductor deployment across the US and Europe.
#PostQuantum #QuantumCryptography #News
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Rigorous finite-size security proof for 1- and 2-decoy BB84 against coherent attacks via entropic uncertainty relations. Resolves technical flaws in prior works on fixed-length protocols and acceptance testing, improving secure-key length bounds.
#QKD #QuantumCryptography #News
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Gilles Brassard & Charles H. Bennett awarded the 2026 ACM Turing Award ($1M) for pioneering quantum cryptography (BB84, 1984) and quantum teleportation (1993), bridging physics & CS to secure communications against future quantum threats.
#QuantumCryptography #TuringAward #News
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Charles H. Bennett & Gilles Brassard receive the 2025 ACM Turing Award ($1M) for inventing the BB84 QKD protocol and quantum teleportation — foundational work underpinning modern quantum cryptography and secure communications.
#QuantumCryptography #TuringAward #News
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The 2026 #TuringAward, known as the Nobel Prize of computer science, given to #GillesBrassard and #CharlesBennett for their foundational work in the field of #QuantumCryptography.
www.quantamagazine.org/quantum-cryp...
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U of Toronto researchers identified exploitable phase correlations in electro-optic QKD encoding and proposed a passive path-selection modulation source using gain switching for phase randomization, validated at 1 GHz clock rate.
#QuantumCryptography #QKD #News
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