11 papers
Entropy Bootstrapping for Wireless Embedded Systems
Javier Blanco-Romero, Florina Almenares Mendoza, Daniel Díaz-Sánchez +1
Cryptographic protocols require unpredictable randomness at first boot, yet wireless sensors often wake with uninitialized hardware or noise sources running in unverified operating…
Modular Lower Bounds on Reeh-Schlieder State Preparation
Javier Blanco-Romero, Florina Almenares Mendoza
The Reeh-Schlieder theorem says that every target vector can be approximated from the vacuum by an operator localized in an arbitrarily small spacetime region, but it gives no quan…
Variational and Majorization Principles in Lattice Reduction
Javier Blanco-Romero, Florina Almenares Mendoza
Lattice reduction smooths the Gram-Schmidt profile, and we use majorization to describe the local swap mechanism behind that smoothing. In this language, each non-degenerate Lovász…
Post-Quantum Entropy as a Service for Embedded Systems
Javier Blanco-Romero, Yuri Melissa Garcia-Niño, Florina Almenares Mendoza +3
Embedded cryptography stands or falls on entropy quality, yet small devices have few trustworthy sources and little tolerance for heavyweight protocols. We build a Quantum Entropy…
On the Practical Feasibility of Harvest-Now, Decrypt-Later Attacks
Javier Blanco-Romero, Florina Almenares Mendoza, Carlos García Rubio +2
Harvest-now, decrypt-later (HN-DL) attacks threaten today's encrypted communications by archiving ciphertext until a quantum computer can break the underlying key exchange. This pa…
Implementing and Evaluating Post-Quantum DNSSEC in CoreDNS
Julio Gento Suela, Javier Blanco-Romero, Florina Almenares Mendoza +1
The emergence of quantum computers poses a significant threat to current secure service, application and/or protocol implementations that rely on RSA and ECDSA algorithms, for inst…
Hybrid Quantum Security for IPsec
Javier Blanco-Romero, Pedro Otero García, Daniel Sobral-Blanco +3
Quantum Key Distribution (QKD) offers information-theoretic security against quantum computing threats, but integrating QKD into existing security protocols remains an unsolved cha…
QKD-KEM: Hybrid QKD Integration into TLS with OpenSSL Providers
Javier Blanco-Romero, Pedro Otero García, Daniel Sobral-Blanco +3
Quantum Key Distribution (QKD) promises information-theoretic security, yet integrating QKD into existing protocols like TLS remains challenging due to its fundamentally different…
Onion Routing Key Distribution for QKDN
Pedro Otero-García, Javier Blanco-Romero, Ana Fernández-Vilas +3
The advance of quantum computing poses a significant threat to classical cryptography, compromising the security of current encryption schemes such as RSA and ECC. In response to t…
Guided Waves in Static Curved Spacetimes
Javier Blanco-Romero
This work investigates the propagation of electromagnetic waves in waveguides within static curved spacetimes. We develop a covariant formalism using Hertzian potentials to describ…
Machine Learning Predictors for Min-Entropy Estimation
Javier Blanco-Romero, Vicente Lorenzo, Florina Almenares Mendoza +1
This study investigates the application of machine learning predictors for min-entropy estimation in Random Number Generators (RNGs), a key component in cryptographic applications…