Realization of finite-size quantum key distribution based on Einstein-Podolsky-Rosen entangled light

[no abstract

Càlcul distribuït en BOINC per el trencament de l'algorisme RC5

Aquest projecte té com a objectiu participar en el desafiament d'RSA Laboratories corresponent a trencar el criptosistema RC5-32-12-9 proposat. Per realitzar-ho s'ha triat realitzar un atac per força bruta, mitjançant el càlcul distribuït i, més concretament, utilitzant la Public Resource Computing. La plataforma escollida és la Berkeley Open Infrastructure for Network Computing (BOINC), coneguda per la seva utilització en grans projectes com ara SETI@home. En aquest projecte es posa en funcionament la infraestructura i es desenvolupen les aplicacions necessàries per iniciar els càlculs que haurien de permetre el trencament del criptosistema.Este proyecto tiene como objetivo participar en el desafío de RSA Laboratories correspondiente a romper el criptosistema RC5-32-12-9 propuesto. Para realizarlo se ha escogido realizar un ataque por fuerza bruta, usando el càlculo distribuido y, más concretamente, la Public Resource Computing. La plataforma escogida es la Berkeley Open Infrastructure for Network Computing (BOINC), conocida por ser usada en grandes proyectos como SETI@home. El este proyecto se pone en funcionamiento la infraestructura y se desarrollan las aplicaciones necesarias para iniciar los cálculos que deberían permitir romper el criptosistema.The main objective of this project is to participate in the challenge of RSA Laboratories corresponding to break the cryptosystem RC5-32-12-9. The strategy used to achieve this goal is to use a brute force attack using distributed computing techniques and, more precisely, Public Resource Computing. The chosen platform is the Berkeley Open Infrastructure for Network Computing (BOINC), a well known infrastructure since it has been used in large projects like SETI@home. In this project the BOINC infrastructure has been configured and it has been developed all necessary applications n order to start the computation that should allow breaking the proposed cryptosystem.Nota: Aquest document conté originàriament altre material i/o programari només consultable a la Biblioteca de Ciència i Tecnologia

Experimental advances in broadband continuous variable quantum key distribution

Quantum key distribution is the first major area of quantum information science to find practical use outside of its field. Quantum key distribution involves transmitting cryptographic keys using quantum states. Any attempt to eavesdrop on the transmission will, necessarily by the laws of quantum mechanics, disturb or destroy the states. By identifying and only using keys that have not been disturbed, a perfectly secure cryptographic system can be realised. ¶ Discrete variable quantum key distribution was proposed in 1984. Since then attempts to exploit this technology have been beset with the difficulties of working with the discrete variables in question—single photon states. In the late 90’s the idea of continuous variable quantum key distribution was developed, in which the key-carrying quantum information states are properties of a bright, continuous wave laser beam. Bright laser beams are relatively simple to manipulate and can carry large amounts of information even when subject to high loss. ‘Broadband’ continuous variable quantum key distribution refers to the large information rates obtainable by using broad laser modulation sidebands. ¶ In 2005 the ANU Quantum Optics group published an experimental demonstration of broadband continuous variable quantum key distribution. This thesis documents the project work undertaken to rebuild an improved version of this experiment, and also the work undertaken to prepare for more advanced experiments. The main goal of the improved experiment was to increase the key distribution rate, while the advanced experiments were directed towards practical implementation of the system in optical fibre. ¶ The experiment rebuild was achieved with most improvements for higher bandwidth successfully implemented. Some improvements were unplanned, being necessitated by problems with the initial improvements. Although preliminary experimental data was acquired, time constraints precluded a successful cryptographic key distribution. Pilot design and major purchasing for future experiments was also completed

Law and Policy for the Quantum Age

Law and Policy for the Quantum Age is for readers interested in the political and business strategies underlying quantum sensing, computing, and communication. This work explains how these quantum technologies work, future national defense and legal landscapes for nations interested in strategic advantage, and paths to profit for companies

Quantum key security : theory and analysis of experimental realisations

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Albuquerque Morning Journal, 10-14-1907

https://digitalrepository.unm.edu/abq_mj_news/4259/thumbnail.jp

Utilizing Personality Theory To Help High School Students Find Meaningful Spiritual Growth Practices at Portland Adventist Academy in Portland, Oregon

The Problem Some students at Portland Adventist Academy (PAA) struggle to connect with God and many never develop personal habits of connecting with God or learn how to grow into mature relationships with God. The Method I developed twelve devotional habits designed for different personality types. Six of the habits focused on prayer and six on Scripture. I taught six religion classes for three weeks, collecting data from 100 junior and senior PAA students. Their ages spanned from 15 to 19: two students were 15 years old, thirty-eight were 16, thirty-eight were 17, twenty were 18, and two were 19. They were fairly evenly dispersed with regard to gender: fifty students identified male, forty-nine female, and one preferred not to indicate gender. With the exception of some introductory and conclusory lectures, discussions, and activities, the majority of the class periods were spent with the students practicing the devotional habits and giving me feedback. Throughout the experience, I administered several digital questionnaires to the participants using Google Forms: before we began the experience a Big Five personality instrument–Soto and John’s BFI-2 (2017), after each devotional habit exercise the Spiritual Exercise Perceived Efficacy Assessment (SEPEA), on the final day of the threeweek period an experience overview assessment, and four months later, a slightly altered version of that final assessment. A mixed methods approach, the questionnaires collected both quantitative and qualitative data, which I analyzed in Excel and SPSS. Results On both final assessments (90 participants filled out the first and 95 the second), over 71% of the participants reported the experience helped them find more meaningful ways of connecting with God. Over 70 students indicated they repeated or planned to repeat an entire habit or an activity within a habit in both the first and second final assessment. The SEPEA received positive face validity feedback and demonstrated high internal consistency, but criterion validity checks were inconclusive. I found significant correlations between personality traits and some devotional habits (for example, with N = 97, Pearson’s r = 0.369 for agreeableness and the sixth devotional habit and r = 0.323 and 0.328 for the habits designed for habits designed for those high in Perception and Intuitiveness on the Myers-Briggs respectively) and activities (for example, with N = 91, Pearson’s r = 0.319 for extraversion and group sharing activities) suggesting several personality-score-derived recommendations for spiritual practices. I saw the highest correlations between the habits themselves. When asked for feedback about the overall experience, 98 students gave some kind of positive feedback. Both quantitative results and quantitative feedback provided insights regarding changes that could be made to the intervention to make it more effective in similar contexts in the future. Conclusions This intervention is a viable way to help high school students find meaningful spiritual practices because it provides open, social, and experiential activities in a safe spiritual environment and has many spiritually positive results. These results provide more robust research support for existing literature that claims a relationship between personality and spiritual practice preferences. It also suggests, if working with a large group and using these same habits, one should introduce the habits in the order L3, L1, S6, S3, L2, S1, S2, S7, S5, S4, S8, L4 (See Appendix F for the list of habits). An additional finding suggests The SEPEA is a viable instrument for measuring perceptions of spiritual activities, but its implications and usefulness need to be further explored by use in one-on-one spiritual direction, comparison with other spirituality measures, and use with larger and varying groups. The intervention’s effect on spiritual maturation should be researched further, as well as its ability to further connect personality and spirituality if habits were designed around Big Five rather than MBTI personality factors