Project Rim: Observational Data Collection

Donenfeld, Ira; Smith, Seward; Haythorn, William W.; Libert, John M.; Brown, Martin A.

doi:10.21236/ad0705066

Cited by 3 publications

(2 citation statements)

References 2 publications

(2 reference statements)

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“…The code is also available at an institutional repository: https://gitlab.ic.unicamp.br/ra142685/phd_libs/ Third-party Usage. Our x64 implementation of X25519 was included in the implementation of the Wireguard protocol [Donenfeld 2018], which offers a VPN-like secure communication tunel between remote machines. Wireguard was recently included in the kernel of Linux.…”

Section: Software Librariesmentioning

confidence: 99%

High-Performance Elliptic Curve Cryptography: A SIMD Approach to Modern Curves

Faz-Hernández

López

2023

Anais Do XXXVI Concurso De Teses E Dissertações (CTD 2023)

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Cryptography based on elliptic curves is endowed with efficient methods for public-key cryptography. Recent research has shown the superiority of the Montgomery and Edwards curves over the Weierstrass curves as they require fewer arithmetic operations. Using these modern curves has, however, introduced several challenges to the cryptographic algorithm’s design, opening up new opportunities for optimization. Our main objective is to propose algorithmic optimizations and implementation techniques for cryptographic algorithms based on elliptic curves. In order to speed up the execution of these algorithms, our approach relies on the use of extensions to the instruction set architecture. In addition to those specific for cryptography, we use extensions that follow the Single Instruction, Multiple Data (SIMD) parallel computing paradigm. In this model, the processor executes the same operation over a set of data in parallel. We investigated how to apply SIMD to the implementation of elliptic curve algorithms. As part of our contributions, we design parallel algorithms for prime field and elliptic curve arithmetic. We also design a new three-point ladder algorithm for the scalar multiplication P + kQ, and a faster formula for calculating 3P on Montgomery curves. These algorithms have found applicability in isogeny-based cryptography. Using SIMD extensions such as SSE, AVX, and AVX2, we develop optimized implementations of the following cryptographic algorithms: X25519, X448, SIDH, ECDH, ECDSA, EdDSA, and qDSA. Performance benchmarks show that these implementations are faster than existing implementations in the state of the art. Our study confirms that using extensions to the instruction set architecture is an effective tool for optimizing implementations of cryptographic algorithms based on elliptic curves. May this be an incentive not only for those seeking to speed up programs in general but also for computer manufacturers to include more advanced extensions that support the increasing demand for cryptography.

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Section: Software Librariesmentioning

confidence: 99%

High-Performance Elliptic Curve Cryptography: A SIMD Approach to Modern Curves

Faz-Hernández

López

2023

Anais Do XXXVI Concurso De Teses E Dissertações (CTD 2023)

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“…Pharmaceutical crystal engineering is a powerful tool for designing new pharmaceutical solids with desired physical and chemical properties to facilitate drug development. , Among the crystal engineering strategies, the design of multicomponent pharmaceutical crystals (e.g., salts, cocrystals, hydrates, and solvates) with substances that are generally recognized as safe (GRAS) has the most flexibility to modulate drug properties. , Crystal engineering has been used to improve several important pharmaceutical properties, including solubility, permeability, bioavailability, stability, grindability, tabletability, and taste . Sublimation is a critical physical phenomenon underlying a number of important industrial processes, e.g., purification, , freeze-drying, , and dye sublimation printing . However, study of this property is scarce in the field of pharmaceutical crystal engineering, , likely due to the rare occurrence of excessive sublimation under ambient condition by most pharmaceutical crystals.…”

Section: Introductionmentioning

confidence: 99%

Reducing the Sublimation Tendency of Ligustrazine through Salt Formation

Wang

et al. 2020

Crystal Growth & Design

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Two new salts of ligustrazine (tetramethylpyrazine, TMP) with the sweeteners saccharine (SAC) and acesulfame (ACS) have been synthesized through the anion exchange reaction. Single crystals of the new forms were prepared, and their structures were determined. The stability of the new salts against heat and humidity was tested and compared to the commercial hydrochloride and phosphate salts. The sublimation kinetics at various temperatures was analyzed using the Arrhenius equation. The results indicated that TMP-ACS exhibits significantly reduced sublimation tendency and hygroscopicity, which make it a more suitable salt for developing a tablet with acceptable shelf stability than the salts currently used in commercial products.

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Effects of compatibility, crowding, group size, and leadership seniority on stress, anxiety, hostility, and annoyance in isolated groups.

Smith

Haythorn²

1972

Journal of Personality and Social Psychology

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Exposed a total of 56 Naval enlisted males to laboratory conditions of isolation and confinement for 21 days. Variables included group size (dyads vs. triads), compatible vs. incompatible groups, crowding vs. less crowding (as measured by cu. ft/man), and junior vs. senior leadership. Ss then completed the Subjective Stress Scale and State-Trait Anxiety Inventory. Analysis indicates that Ss reported (a) higher subjective stress and state anxiety during isolation than during pre- and postisolation base-line periods, (b) greater hostility in junior-led and in incompatible groups, (c) a greater effect of crowding on subjective stress and state anxiety in triads, (d) greater hostility in less crowded rooms, (e) greater annoyance with physical aspects of the situation in compatible groups and in dyads, (f) greater anxiety in dyads, and (g) better adaptation to confinement in triads and in less crowded rooms. Results reflect the highly interactive nature of the relationships between the subjective reactions of individuals in groups and both social and physical aspects of the group setting. (29 ref.)

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Project Rim: Observational Data Collection

Cited by 3 publications

References 2 publications

High-Performance Elliptic Curve Cryptography: A SIMD Approach to Modern Curves

High-Performance Elliptic Curve Cryptography: A SIMD Approach to Modern Curves

Reducing the Sublimation Tendency of Ligustrazine through Salt Formation

Effects of compatibility, crowding, group size, and leadership seniority on stress, anxiety, hostility, and annoyance in isolated groups.

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