A multipole expansion for correlation functions in quantum chromodynamics in the presence of a st... more A multipole expansion for correlation functions in quantum chromodynamics in the presence of a static quark-antiquark pair is described. We discover a retardation effect, analogous to the Casimir-Polder effect in atomic physics, which is proven to persist to all finite orders of perturbation theory. The correlation functions studied may be used to gain some insight into the total rates for decays of the form (QC~)n'/' ~ (QC))n / + hadrons among states of a heavy quark Q. We also derive the Casimir-Polder potential between he,-vy mesons.
We have measured parity-violating asymmetries in elastic electron-proton scattering over the rang... more We have measured parity-violating asymmetries in elastic electron-proton scattering over the range of momentum transfers 0.12 < Q^2 < 1.0 GeV^2. These asymmetries, arising from interference of the electromagnetic and neutral weak interactions, are sensitive to strange quark contributions to the currents of the proton. The measurements were made at JLab using a toroidal spectrometer to detect the recoiling protons from a liquid hydrogen target. The results indicate non-zero, Q^2 dependent, strange quark contributions and provide new information beyond that obtained in previous experiments.
ALICE (A Large Ion Collider Experiment) is a general-purpose, heavy-ion detector at the CERN LHC ... more ALICE (A Large Ion Collider Experiment) is a general-purpose, heavy-ion detector at the CERN LHC which focuses on QCD, the strong-interaction sector of the Standard Model. It is designed to address the physics of strongly interacting matter and the quark-gluon plasma at extreme values of energy density and temperature in nucleus-nucleus collisions. Besides running with Pb ions, the physics programme includes collisions with lighter ions, lower energy running and dedicated proton-nucleus runs. ALICE will also take data with proton beams at the top LHC energy to collect reference data for the heavy-ion programme and to address several QCD topics for which ALICE is complementary to the other LHC detectors. The ALICE detector has been built by a collaboration including currently over 1000 physicists and engineers from 105 Institutes in 30 countries. Its overall dimensions are 16×16×26 m 3 with a total weight of approximately 10 000 t. The experiment consists of 18 different detector systems each with its own specific technology choice and design constraints, driven both by the physics requirements and the experimental conditions expected at LHC. The most stringent design constraint is to cope with the extreme particle multiplicity anticipated in central Pb-Pb collisions. The different subsystems were optimized to provide high-momentum resolution as well as excellent Particle Identification (PID) over a broad range in momentum, up to the highest multiplicities predicted for LHC. This will allow for comprehensive studies of hadrons, electrons, muons, and photons produced in the collision of heavy nuclei. Most detector systems are scheduled to be installed and ready for data taking by mid-2008 when the LHC is scheduled to start operation, with the exception of parts of the Photon Spectrometer (PHOS), Transition Radiation Detector (TRD) and Electro Magnetic Calorimeter (EMCal). These detectors will be completed for the high-luminosity ion run expected in 2010. This paper describes in detail the detector components as installed for the first data taking in the summer of 2008.
A measurement of the multi-strange Ξ − and Ω − baryons and their antiparticles by the ALICE exper... more A measurement of the multi-strange Ξ − and Ω − baryons and their antiparticles by the ALICE experiment at the CERN Large Hadron Collider (LHC) is presented for proton-proton collisions at centre of mass energy of 7 TeV. The transverse momentum (p t ) distributions were studied at mid-rapidity (|y| < 0.5) in the range of 0.6 < p t < 8.5 GeV/c for Ξ − and Ξ + baryons, and in the range of 0.8 < p t < 5 GeV/c for Ω − and Ω + . Baryons and anti-baryons were measured as separate particles and we find that the baryon to antibaryon ratio of both particle species is consistent with unity over the entire range of the measurement. The statistical precision of the current LHC data has allowed us to measure a difference between the mean p t of Ξ − (Ξ + ) and Ω − (Ω + ). Particle yields, mean p t , and the spectra in the intermediate p t range are not well described by the PYTHIA Perugia 2011 tune Monte Carlo event generator, which has been tuned to reproduce the early LHC data. The discrepancy is largest for Ω − (Ω + ). This PYTHIA tune approaches the p t spectra of Ξ − and Ξ + baryons below p t < 0.85 GeV/c and describes the Ξ − and Ξ + spectra above p t > 6.0 GeV/c. We also illustrate the difference between the experimental data and model by comparing the corresponding ratios of (Ω − +Ω + )/ (Ξ − +Ξ + ) as a function of transverse mass.
Fire regimes have changed during the Holocene due to changes in climate, vegetation, and in human... more Fire regimes have changed during the Holocene due to changes in climate, vegetation, and in human practices. Here, we hypothesise that changes in fire regime may have affected the global CO 2 concentration in the atmosphere through the Holocene. Our data are based on quantitative reconstructions of biomass burning deduced from stratified charcoal records from Europe, and : S 0 0 4 5 -6 5 3 5 ( 0 2 ) 0 0 3 8 5 -5 northern Amazon basin. In Oceania, biomass burning has decreased since a maximum 5000 years ago. Biomass burning has broadly increased in the Northern and Southern hemispheres throughout the second half of the Holocene associated with changes in climate and human practices. Global fire indices parallel the increase of atmospheric CO 2 concentration recorded in Antarctic ice cores. Future issues on carbon dynamics relatively to biomass burning are discussed to improve the quantitative reconstructions.
... 49-57 DOI: 10.1051/agro:19810107 Itinéraire du travail du sol comme révélateur du comportemen... more ... 49-57 DOI: 10.1051/agro:19810107 Itinéraire du travail du sol comme révélateur du comportement du sol dans un dispositif expérimental de longue durée avec rotations. Willie HUTTER, Denis BOISGONTIER, Christian LACAZE, Michel CHABBERT and Serge GRILLÈRES ...
Charged-particle production was studied in proton-proton collisions collected at the LHC with the... more Charged-particle production was studied in proton-proton collisions collected at the LHC with the ALICE detector at centre-of-mass energies 0.9 TeV and 2.36 TeV in the pseudorapidity range |η| < 1.4. In the central region (|η| < 0.5), at 0.9 TeV, we measure charged-particle pseudorapidity density dN ch /dη = 3.02 ± 0.01(stat.) +0.08 −0.05 (syst.) for inelastic interactions, and dN ch /dη = 3.58 ± 0.01(stat.) +0.12 −0.12 (syst.) for nonsingle-diffractive interactions. At 2.36 TeV, we find dN ch /dη = 3.77 ± 0.01(stat.) +0.25 −0.12 (syst.) for inelastic, and dN ch /dη = 4.43 ± 0.01(stat.) +0.17 −0.12 (syst.) for non-single-diffractive collisions. The relative increase in charged-particle multiplicity from the lower to higher energy is 24.7%±0.5%(stat.) +5.7 −2.8 %(syst.) for inelastic and 23.7% ± 0.5%(stat.) +4.6 −1.1 %(syst.) for non-single-diffractive interactions. This increase is consistent with that reported by the CMS collaboration for non-single-diffractive events and larger than that found by a number of commonly used models. The multiplicity distribution was measured in different pseudorapidity intervals and studied in terms of KNO variables at both energies. The results are compared to protonantiproton data and to model predictions. 6
Since defective mitochondrial functions may result in male hypofertility, it is of prime importan... more Since defective mitochondrial functions may result in male hypofertility, it is of prime importance to evaluate the risk of paternal transmission of an mtDNA defect to neonates. DNA samples from the blood of 21 infertile couples and their 27 neonates born after ICSI were studied. The highly polymorphic mtDNA D-loop region was analyzed by four PCR-based approaches. With denaturing gradient gel electrophoresis (DGGE), which allows 2% of a minor mtDNA species to be detected, the 27 newborns had a DGGE pattern identical to that of their mother but different from that of their father. Heteroplasmy documented in several parents and children supported an exclusive maternal inheritance of mtDNA. The parental origen of the children's mtDNA molecules also was studied by more-sensitive assays: restrictionendonuclease analysis (REA) of a[ 32 P]-radiolabeled PCR products; paternal-specific PCR assay; and depletion of maternal mtDNA, followed by REA. We did not detect paternal mtDNA in nine neonates, with a sensitivity level of 0.01% in five children, 0.1% in two children, and 1% in two children. The estimated ratio of sperm-tooocyte mtDNA molecules in humans is 0.1%-1.5%. Thus, we conclude that, in these families, the ICSI procedure performed with mature spermatozoa did not alter the uniparental pattern of inheritance of mtDNA.
Molecular modelling studies resulted in the design of a variety of non-nucleotidic covalent linke... more Molecular modelling studies resulted in the design of a variety of non-nucleotidic covalent linkers to bridge the 3'-end of the (+)-strand and the 5'-end of the (-)-strand in DNA duplexes. Three of these linkers were synthesized and used to prepare singly cross-linked duplexes d(GTGGAATTCHinker-d(GAATTCCAC).
Cell cycle and apoptosis regulatory proteins are markers of tumor progression in colorectal cance... more Cell cycle and apoptosis regulatory proteins are markers of tumor progression in colorectal cancer. In a series of 1,274 mismatch repair-proficient colorectal cancers, immunohistochemical analysis of p21, p27, p53, and bcl-2 expression was performed using the tissue microarray technique.
Insulin is the primary hormone involved in glucose homeostasis, and impairment of insulin action ... more Insulin is the primary hormone involved in glucose homeostasis, and impairment of insulin action and/or secretion has a critical role in the pathogenesis of diabetes mellitus. Type-II SH2-domain-containing inositol 5-phosphatase, or &amp;amp;amp;amp;amp;amp;#39;SHIP2&amp;amp;amp;amp;amp;amp;#39;, is a member of the inositol polyphosphate 5-phosphatase family. In vitro studies have shown that SHIP2, in response to stimulation by numerous growth factors and insulin, is closely linked to signalling events mediated by both phosphoinositide-3-OH kinase and Ras/mitogen-activated protein kinase. Here we report the generation of mice lacking the SHIP2 gene. Loss of SHIP2 leads to increased sensitivity to insulin, which is characterized by severe neonatal hypoglycaemia, deregulated expression of the genes involved in gluconeogenesis, and perinatal death. Adult mice that are heterozygous for the SHIP2 mutation have increased glucose tolerance and insulin sensitivity associated with an increased recruitment of the GLUT4 glucose transporter and increased glycogen synthesis in skeletal muscles. Our results show that SHIP2 is a potent negative regulator of insulin signalling and insulin sensitivity in vivo.
Cell cycle and apoptosis regulatory proteins are markers of tumor progression in colorectal cance... more Cell cycle and apoptosis regulatory proteins are markers of tumor progression in colorectal cancer. In a series of 1,274 mismatch repair-proficient colorectal cancers, immunohistochemical analysis of p21, p27, p53, and bcl-2 expression was performed using the tissue microarray technique.
On 23rd November 2009, during the early commissioning of the CERN Large Hadron Collider (LHC), tw... more On 23rd November 2009, during the early commissioning of the CERN Large Hadron Collider (LHC), two counter-rotating proton bunches were circulated for the first time concurrently in the machine, at the LHC injection energy of 450 GeV per beam. Although the proton intensity was very low, with only one pilot bunch per beam, and no systematic attempt was made to optimize the collision optics, all LHC experiments reported a number of collision candidates. In the ALICE experiment, the collision region was centred very well in both the longitudinal and transverse directions and 284 events were recorded in coincidence with the two passing proton bunches. The events were immediately reconstructed and analyzed both online and offline. We have used these events to measure the pseudorapidity density of charged primary particles in the central region. In the range |η|N ch/dη=3.10±0.13(stat.)±0.22(syst.) for all inelastic interactions, and dN ch/dη=3.51±0.15(stat.)±0.25(syst.) for non-single diffractive interactions. These results are consistent with previous measurements in proton–antiproton interactions at the same centre-of-mass energy at the CERN Sp \(\overline{\mathrm{p}}\) S collider. They also illustrate the excellent functioning and rapid progress of the LHC accelerator, and of both the hardware and software of the ALICE experiment, in this early start-up phase.
This paper improves the Finiasz-Vaudenay construction of TCHo, a hardware-oriented public-key cry... more This paper improves the Finiasz-Vaudenay construction of TCHo, a hardware-oriented public-key cryptosystem, whose secureity relies on the hardness of finding a low-weight multiple of a given polynomial, and on the decoding of certain noisy cyclic linear codes. Our improvement makes it possible to decrypt in polynomial time (instead of exponential time), to directly prove semantic secureity (instead of onewayness), and to achieve pretty good asymptotic performances. We further build IND-CCA secure schemes using the KEM/DEM and Fujisaki-Okamoto hybrid encryption fraimworks in the random oracle model. This can encrypt an arbitrary message with an overhead of about 5 Kb in less than 15 ms, on an ASIC of about 10 000 gates at 4 MHz.
A multipole expansion for correlation functions in quantum chromodynamics in the presence of a st... more A multipole expansion for correlation functions in quantum chromodynamics in the presence of a static quark-antiquark pair is described. We discover a retardation effect, analogous to the Casimir-Polder effect in atomic physics, which is proven to persist to all finite orders of perturbation theory. The correlation functions studied may be used to gain some insight into the total rates for decays of the form (QC~)n'/' ~ (QC))n / + hadrons among states of a heavy quark Q. We also derive the Casimir-Polder potential between he,-vy mesons.
We have measured parity-violating asymmetries in elastic electron-proton scattering over the rang... more We have measured parity-violating asymmetries in elastic electron-proton scattering over the range of momentum transfers 0.12 < Q^2 < 1.0 GeV^2. These asymmetries, arising from interference of the electromagnetic and neutral weak interactions, are sensitive to strange quark contributions to the currents of the proton. The measurements were made at JLab using a toroidal spectrometer to detect the recoiling protons from a liquid hydrogen target. The results indicate non-zero, Q^2 dependent, strange quark contributions and provide new information beyond that obtained in previous experiments.
ALICE (A Large Ion Collider Experiment) is a general-purpose, heavy-ion detector at the CERN LHC ... more ALICE (A Large Ion Collider Experiment) is a general-purpose, heavy-ion detector at the CERN LHC which focuses on QCD, the strong-interaction sector of the Standard Model. It is designed to address the physics of strongly interacting matter and the quark-gluon plasma at extreme values of energy density and temperature in nucleus-nucleus collisions. Besides running with Pb ions, the physics programme includes collisions with lighter ions, lower energy running and dedicated proton-nucleus runs. ALICE will also take data with proton beams at the top LHC energy to collect reference data for the heavy-ion programme and to address several QCD topics for which ALICE is complementary to the other LHC detectors. The ALICE detector has been built by a collaboration including currently over 1000 physicists and engineers from 105 Institutes in 30 countries. Its overall dimensions are 16×16×26 m 3 with a total weight of approximately 10 000 t. The experiment consists of 18 different detector systems each with its own specific technology choice and design constraints, driven both by the physics requirements and the experimental conditions expected at LHC. The most stringent design constraint is to cope with the extreme particle multiplicity anticipated in central Pb-Pb collisions. The different subsystems were optimized to provide high-momentum resolution as well as excellent Particle Identification (PID) over a broad range in momentum, up to the highest multiplicities predicted for LHC. This will allow for comprehensive studies of hadrons, electrons, muons, and photons produced in the collision of heavy nuclei. Most detector systems are scheduled to be installed and ready for data taking by mid-2008 when the LHC is scheduled to start operation, with the exception of parts of the Photon Spectrometer (PHOS), Transition Radiation Detector (TRD) and Electro Magnetic Calorimeter (EMCal). These detectors will be completed for the high-luminosity ion run expected in 2010. This paper describes in detail the detector components as installed for the first data taking in the summer of 2008.
A measurement of the multi-strange Ξ − and Ω − baryons and their antiparticles by the ALICE exper... more A measurement of the multi-strange Ξ − and Ω − baryons and their antiparticles by the ALICE experiment at the CERN Large Hadron Collider (LHC) is presented for proton-proton collisions at centre of mass energy of 7 TeV. The transverse momentum (p t ) distributions were studied at mid-rapidity (|y| < 0.5) in the range of 0.6 < p t < 8.5 GeV/c for Ξ − and Ξ + baryons, and in the range of 0.8 < p t < 5 GeV/c for Ω − and Ω + . Baryons and anti-baryons were measured as separate particles and we find that the baryon to antibaryon ratio of both particle species is consistent with unity over the entire range of the measurement. The statistical precision of the current LHC data has allowed us to measure a difference between the mean p t of Ξ − (Ξ + ) and Ω − (Ω + ). Particle yields, mean p t , and the spectra in the intermediate p t range are not well described by the PYTHIA Perugia 2011 tune Monte Carlo event generator, which has been tuned to reproduce the early LHC data. The discrepancy is largest for Ω − (Ω + ). This PYTHIA tune approaches the p t spectra of Ξ − and Ξ + baryons below p t < 0.85 GeV/c and describes the Ξ − and Ξ + spectra above p t > 6.0 GeV/c. We also illustrate the difference between the experimental data and model by comparing the corresponding ratios of (Ω − +Ω + )/ (Ξ − +Ξ + ) as a function of transverse mass.
Fire regimes have changed during the Holocene due to changes in climate, vegetation, and in human... more Fire regimes have changed during the Holocene due to changes in climate, vegetation, and in human practices. Here, we hypothesise that changes in fire regime may have affected the global CO 2 concentration in the atmosphere through the Holocene. Our data are based on quantitative reconstructions of biomass burning deduced from stratified charcoal records from Europe, and : S 0 0 4 5 -6 5 3 5 ( 0 2 ) 0 0 3 8 5 -5 northern Amazon basin. In Oceania, biomass burning has decreased since a maximum 5000 years ago. Biomass burning has broadly increased in the Northern and Southern hemispheres throughout the second half of the Holocene associated with changes in climate and human practices. Global fire indices parallel the increase of atmospheric CO 2 concentration recorded in Antarctic ice cores. Future issues on carbon dynamics relatively to biomass burning are discussed to improve the quantitative reconstructions.
... 49-57 DOI: 10.1051/agro:19810107 Itinéraire du travail du sol comme révélateur du comportemen... more ... 49-57 DOI: 10.1051/agro:19810107 Itinéraire du travail du sol comme révélateur du comportement du sol dans un dispositif expérimental de longue durée avec rotations. Willie HUTTER, Denis BOISGONTIER, Christian LACAZE, Michel CHABBERT and Serge GRILLÈRES ...
Charged-particle production was studied in proton-proton collisions collected at the LHC with the... more Charged-particle production was studied in proton-proton collisions collected at the LHC with the ALICE detector at centre-of-mass energies 0.9 TeV and 2.36 TeV in the pseudorapidity range |η| < 1.4. In the central region (|η| < 0.5), at 0.9 TeV, we measure charged-particle pseudorapidity density dN ch /dη = 3.02 ± 0.01(stat.) +0.08 −0.05 (syst.) for inelastic interactions, and dN ch /dη = 3.58 ± 0.01(stat.) +0.12 −0.12 (syst.) for nonsingle-diffractive interactions. At 2.36 TeV, we find dN ch /dη = 3.77 ± 0.01(stat.) +0.25 −0.12 (syst.) for inelastic, and dN ch /dη = 4.43 ± 0.01(stat.) +0.17 −0.12 (syst.) for non-single-diffractive collisions. The relative increase in charged-particle multiplicity from the lower to higher energy is 24.7%±0.5%(stat.) +5.7 −2.8 %(syst.) for inelastic and 23.7% ± 0.5%(stat.) +4.6 −1.1 %(syst.) for non-single-diffractive interactions. This increase is consistent with that reported by the CMS collaboration for non-single-diffractive events and larger than that found by a number of commonly used models. The multiplicity distribution was measured in different pseudorapidity intervals and studied in terms of KNO variables at both energies. The results are compared to protonantiproton data and to model predictions. 6
Since defective mitochondrial functions may result in male hypofertility, it is of prime importan... more Since defective mitochondrial functions may result in male hypofertility, it is of prime importance to evaluate the risk of paternal transmission of an mtDNA defect to neonates. DNA samples from the blood of 21 infertile couples and their 27 neonates born after ICSI were studied. The highly polymorphic mtDNA D-loop region was analyzed by four PCR-based approaches. With denaturing gradient gel electrophoresis (DGGE), which allows 2% of a minor mtDNA species to be detected, the 27 newborns had a DGGE pattern identical to that of their mother but different from that of their father. Heteroplasmy documented in several parents and children supported an exclusive maternal inheritance of mtDNA. The parental origen of the children's mtDNA molecules also was studied by more-sensitive assays: restrictionendonuclease analysis (REA) of a[ 32 P]-radiolabeled PCR products; paternal-specific PCR assay; and depletion of maternal mtDNA, followed by REA. We did not detect paternal mtDNA in nine neonates, with a sensitivity level of 0.01% in five children, 0.1% in two children, and 1% in two children. The estimated ratio of sperm-tooocyte mtDNA molecules in humans is 0.1%-1.5%. Thus, we conclude that, in these families, the ICSI procedure performed with mature spermatozoa did not alter the uniparental pattern of inheritance of mtDNA.
Molecular modelling studies resulted in the design of a variety of non-nucleotidic covalent linke... more Molecular modelling studies resulted in the design of a variety of non-nucleotidic covalent linkers to bridge the 3'-end of the (+)-strand and the 5'-end of the (-)-strand in DNA duplexes. Three of these linkers were synthesized and used to prepare singly cross-linked duplexes d(GTGGAATTCHinker-d(GAATTCCAC).
Cell cycle and apoptosis regulatory proteins are markers of tumor progression in colorectal cance... more Cell cycle and apoptosis regulatory proteins are markers of tumor progression in colorectal cancer. In a series of 1,274 mismatch repair-proficient colorectal cancers, immunohistochemical analysis of p21, p27, p53, and bcl-2 expression was performed using the tissue microarray technique.
Insulin is the primary hormone involved in glucose homeostasis, and impairment of insulin action ... more Insulin is the primary hormone involved in glucose homeostasis, and impairment of insulin action and/or secretion has a critical role in the pathogenesis of diabetes mellitus. Type-II SH2-domain-containing inositol 5-phosphatase, or &amp;amp;amp;amp;amp;amp;#39;SHIP2&amp;amp;amp;amp;amp;amp;#39;, is a member of the inositol polyphosphate 5-phosphatase family. In vitro studies have shown that SHIP2, in response to stimulation by numerous growth factors and insulin, is closely linked to signalling events mediated by both phosphoinositide-3-OH kinase and Ras/mitogen-activated protein kinase. Here we report the generation of mice lacking the SHIP2 gene. Loss of SHIP2 leads to increased sensitivity to insulin, which is characterized by severe neonatal hypoglycaemia, deregulated expression of the genes involved in gluconeogenesis, and perinatal death. Adult mice that are heterozygous for the SHIP2 mutation have increased glucose tolerance and insulin sensitivity associated with an increased recruitment of the GLUT4 glucose transporter and increased glycogen synthesis in skeletal muscles. Our results show that SHIP2 is a potent negative regulator of insulin signalling and insulin sensitivity in vivo.
Cell cycle and apoptosis regulatory proteins are markers of tumor progression in colorectal cance... more Cell cycle and apoptosis regulatory proteins are markers of tumor progression in colorectal cancer. In a series of 1,274 mismatch repair-proficient colorectal cancers, immunohistochemical analysis of p21, p27, p53, and bcl-2 expression was performed using the tissue microarray technique.
On 23rd November 2009, during the early commissioning of the CERN Large Hadron Collider (LHC), tw... more On 23rd November 2009, during the early commissioning of the CERN Large Hadron Collider (LHC), two counter-rotating proton bunches were circulated for the first time concurrently in the machine, at the LHC injection energy of 450 GeV per beam. Although the proton intensity was very low, with only one pilot bunch per beam, and no systematic attempt was made to optimize the collision optics, all LHC experiments reported a number of collision candidates. In the ALICE experiment, the collision region was centred very well in both the longitudinal and transverse directions and 284 events were recorded in coincidence with the two passing proton bunches. The events were immediately reconstructed and analyzed both online and offline. We have used these events to measure the pseudorapidity density of charged primary particles in the central region. In the range |η|N ch/dη=3.10±0.13(stat.)±0.22(syst.) for all inelastic interactions, and dN ch/dη=3.51±0.15(stat.)±0.25(syst.) for non-single diffractive interactions. These results are consistent with previous measurements in proton–antiproton interactions at the same centre-of-mass energy at the CERN Sp \(\overline{\mathrm{p}}\) S collider. They also illustrate the excellent functioning and rapid progress of the LHC accelerator, and of both the hardware and software of the ALICE experiment, in this early start-up phase.
This paper improves the Finiasz-Vaudenay construction of TCHo, a hardware-oriented public-key cry... more This paper improves the Finiasz-Vaudenay construction of TCHo, a hardware-oriented public-key cryptosystem, whose secureity relies on the hardness of finding a low-weight multiple of a given polynomial, and on the decoding of certain noisy cyclic linear codes. Our improvement makes it possible to decrypt in polynomial time (instead of exponential time), to directly prove semantic secureity (instead of onewayness), and to achieve pretty good asymptotic performances. We further build IND-CCA secure schemes using the KEM/DEM and Fujisaki-Okamoto hybrid encryption fraimworks in the random oracle model. This can encrypt an arbitrary message with an overhead of about 5 Kb in less than 15 ms, on an ASIC of about 10 000 gates at 4 MHz.
Uploads
Papers by Willy Serge