---
_id: '6430'
abstract:
- lang: eng
text: "A proxy re-encryption (PRE) scheme is a public-key encryption scheme that
allows the holder of a key pk to derive a re-encryption key for any other key
\U0001D45D\U0001D458′. This re-encryption key lets anyone transform ciphertexts
under pk into ciphertexts under \U0001D45D\U0001D458′ without having to know the
underlying message, while transformations from \U0001D45D\U0001D458′ to pk should
not be possible (unidirectional). Security is defined in a multi-user setting
against an adversary that gets the users’ public keys and can ask for re-encryption
keys and can corrupt users by requesting their secret keys. Any ciphertext that
the adversary cannot trivially decrypt given the obtained secret and re-encryption
keys should be secure.\r\n\r\nAll existing security proofs for PRE only show selective
security, where the adversary must first declare the users it wants to corrupt.
This can be lifted to more meaningful adaptive security by guessing the set of
corrupted users among the n users, which loses a factor exponential in Open image
in new window , rendering the result meaningless already for moderate Open image
in new window .\r\n\r\nJafargholi et al. (CRYPTO’17) proposed a framework that
in some cases allows to give adaptive security proofs for schemes which were previously
only known to be selectively secure, while avoiding the exponential loss that
results from guessing the adaptive choices made by an adversary. We apply their
framework to PREs that satisfy some natural additional properties. Concretely,
we give a more fine-grained reduction for several unidirectional PREs, proving
adaptive security at a much smaller loss. The loss depends on the graph of users
whose edges represent the re-encryption keys queried by the adversary. For trees
and chains the loss is quasi-polynomial in the size and for general graphs it
is exponential in their depth and indegree (instead of their size as for previous
reductions). Fortunately, trees and low-depth graphs cover many, if not most,
interesting applications.\r\n\r\nOur results apply e.g. to the bilinear-map based
PRE schemes by Ateniese et al. (NDSS’05 and CT-RSA’09), Gentry’s FHE-based scheme
(STOC’09) and the LWE-based scheme by Chandran et al. (PKC’14)."
alternative_title:
- LNCS
article_processing_charge: No
author:
- first_name: Georg
full_name: Fuchsbauer, Georg
id: 46B4C3EE-F248-11E8-B48F-1D18A9856A87
last_name: Fuchsbauer
- first_name: Chethan
full_name: Kamath Hosdurg, Chethan
id: 4BD3F30E-F248-11E8-B48F-1D18A9856A87
last_name: Kamath Hosdurg
- first_name: Karen
full_name: Klein, Karen
id: 3E83A2F8-F248-11E8-B48F-1D18A9856A87
last_name: Klein
- first_name: Krzysztof Z
full_name: Pietrzak, Krzysztof Z
id: 3E04A7AA-F248-11E8-B48F-1D18A9856A87
last_name: Pietrzak
orcid: 0000-0002-9139-1654
citation:
ama: 'Fuchsbauer G, Kamath Hosdurg C, Klein K, Pietrzak KZ. Adaptively secure proxy
re-encryption. In: Vol 11443. Springer Nature; 2019:317-346. doi:10.1007/978-3-030-17259-6_11'
apa: 'Fuchsbauer, G., Kamath Hosdurg, C., Klein, K., & Pietrzak, K. Z. (2019).
Adaptively secure proxy re-encryption (Vol. 11443, pp. 317–346). Presented at
the PKC: Public-Key Cryptograhy, Beijing, China: Springer Nature. https://doi.org/10.1007/978-3-030-17259-6_11'
chicago: Fuchsbauer, Georg, Chethan Kamath Hosdurg, Karen Klein, and Krzysztof Z
Pietrzak. “Adaptively Secure Proxy Re-Encryption,” 11443:317–46. Springer Nature,
2019. https://doi.org/10.1007/978-3-030-17259-6_11.
ieee: 'G. Fuchsbauer, C. Kamath Hosdurg, K. Klein, and K. Z. Pietrzak, “Adaptively
secure proxy re-encryption,” presented at the PKC: Public-Key Cryptograhy, Beijing,
China, 2019, vol. 11443, pp. 317–346.'
ista: 'Fuchsbauer G, Kamath Hosdurg C, Klein K, Pietrzak KZ. 2019. Adaptively secure
proxy re-encryption. PKC: Public-Key Cryptograhy, LNCS, vol. 11443, 317–346.'
mla: Fuchsbauer, Georg, et al. Adaptively Secure Proxy Re-Encryption. Vol.
11443, Springer Nature, 2019, pp. 317–46, doi:10.1007/978-3-030-17259-6_11.
short: G. Fuchsbauer, C. Kamath Hosdurg, K. Klein, K.Z. Pietrzak, in:, Springer
Nature, 2019, pp. 317–346.
conference:
end_date: 2019-04-17
location: Beijing, China
name: 'PKC: Public-Key Cryptograhy'
start_date: 2019-04-14
date_created: 2019-05-13T08:13:46Z
date_published: 2019-04-06T00:00:00Z
date_updated: 2023-09-08T11:33:20Z
day: '06'
department:
- _id: KrPi
doi: 10.1007/978-3-030-17259-6_11
ec_funded: 1
intvolume: ' 11443'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://eprint.iacr.org/2018/426
month: '04'
oa: 1
oa_version: Preprint
page: 317-346
project:
- _id: 258AA5B2-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '682815'
name: Teaching Old Crypto New Tricks
publication_identifier:
eissn:
- '16113349'
isbn:
- '9783030172589'
issn:
- '03029743'
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
record:
- id: '10035'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Adaptively secure proxy re-encryption
type: conference
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 11443
year: '2019'
...
---
_id: '6069'
abstract:
- lang: eng
text: Electron transport in two-dimensional conducting materials such as graphene,
with dominant electron–electron interaction, exhibits unusual vortex flow that
leads to a nonlocal current-field relation (negative resistance), distinct from
the classical Ohm’s law. The transport behavior of these materials is best described
by low Reynolds number hydrodynamics, where the constitutive pressure–speed relation
is Stoke’s law. Here we report evidence of such vortices observed in a viscous
flow of Newtonian fluid in a microfluidic device consisting of a rectangular cavity—analogous
to the electronic system. We extend our experimental observations to elliptic
cavities of different eccentricities, and validate them by numerically solving
bi-harmonic equation obtained for the viscous flow with no-slip boundary conditions.
We verify the existence of a predicted threshold at which vortices appear. Strikingly,
we find that a two-dimensional theoretical model captures the essential features
of three-dimensional Stokes flow in experiments.
article_number: '937'
article_processing_charge: No
author:
- first_name: Jonathan
full_name: Mayzel, Jonathan
last_name: Mayzel
- first_name: Victor
full_name: Steinberg, Victor
last_name: Steinberg
- first_name: Atul
full_name: Varshney, Atul
id: 2A2006B2-F248-11E8-B48F-1D18A9856A87
last_name: Varshney
orcid: 0000-0002-3072-5999
citation:
ama: Mayzel J, Steinberg V, Varshney A. Stokes flow analogous to viscous electron
current in graphene. Nature Communications. 2019;10. doi:10.1038/s41467-019-08916-5
apa: Mayzel, J., Steinberg, V., & Varshney, A. (2019). Stokes flow analogous
to viscous electron current in graphene. Nature Communications. Springer
Nature. https://doi.org/10.1038/s41467-019-08916-5
chicago: Mayzel, Jonathan, Victor Steinberg, and Atul Varshney. “Stokes Flow Analogous
to Viscous Electron Current in Graphene.” Nature Communications. Springer
Nature, 2019. https://doi.org/10.1038/s41467-019-08916-5.
ieee: J. Mayzel, V. Steinberg, and A. Varshney, “Stokes flow analogous to viscous
electron current in graphene,” Nature Communications, vol. 10. Springer
Nature, 2019.
ista: Mayzel J, Steinberg V, Varshney A. 2019. Stokes flow analogous to viscous
electron current in graphene. Nature Communications. 10, 937.
mla: Mayzel, Jonathan, et al. “Stokes Flow Analogous to Viscous Electron Current
in Graphene.” Nature Communications, vol. 10, 937, Springer Nature, 2019,
doi:10.1038/s41467-019-08916-5.
short: J. Mayzel, V. Steinberg, A. Varshney, Nature Communications 10 (2019).
date_created: 2019-03-05T13:18:30Z
date_published: 2019-02-26T00:00:00Z
date_updated: 2023-09-08T11:39:02Z
day: '26'
ddc:
- '530'
- '532'
department:
- _id: BjHo
doi: 10.1038/s41467-019-08916-5
ec_funded: 1
external_id:
isi:
- '000459704600001'
file:
- access_level: open_access
checksum: 61192fc49e0d44907c2a4fe384e4b97f
content_type: application/pdf
creator: dernst
date_created: 2019-03-05T13:33:04Z
date_updated: 2020-07-14T12:47:18Z
file_id: '6070'
file_name: 2019_NatureComm_Mayzel.pdf
file_size: 2646391
relation: main_file
file_date_updated: 2020-07-14T12:47:18Z
has_accepted_license: '1'
intvolume: ' 10'
isi: 1
language:
- iso: eng
month: '02'
oa: 1
oa_version: Published Version
project:
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
publication: Nature Communications
publication_identifier:
issn:
- 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Stokes flow analogous to viscous electron current in graphene
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 10
year: '2019'
...
---
_id: '6014'
abstract:
- lang: eng
text: Speed of sound waves in gases and liquids are governed by the compressibility
of the medium. There exists another type of non-dispersive wave where the wave
speed depends on stress instead of elasticity of the medium. A well-known example
is the Alfven wave, which propagates through plasma permeated by a magnetic field
with the speed determined by magnetic tension. An elastic analogue of Alfven waves
has been predicted in a flow of dilute polymer solution where the elastic stress
of the stretching polymers determines the elastic wave speed. Here we present
quantitative evidence of elastic Alfven waves in elastic turbulence of a viscoelastic
creeping flow between two obstacles in channel flow. The key finding in the experimental
proof is a nonlinear dependence of the elastic wave speed cel on the Weissenberg
number Wi, which deviates from predictions based on a model of linear polymer
elasticity.
article_number: '652'
article_processing_charge: No
article_type: original
author:
- first_name: Atul
full_name: Varshney, Atul
id: 2A2006B2-F248-11E8-B48F-1D18A9856A87
last_name: Varshney
orcid: 0000-0002-3072-5999
- first_name: Victor
full_name: Steinberg, Victor
last_name: Steinberg
citation:
ama: Varshney A, Steinberg V. Elastic alfven waves in elastic turbulence. Nature
Communications. 2019;10. doi:10.1038/s41467-019-08551-0
apa: Varshney, A., & Steinberg, V. (2019). Elastic alfven waves in elastic turbulence.
Nature Communications. Springer Nature. https://doi.org/10.1038/s41467-019-08551-0
chicago: Varshney, Atul, and Victor Steinberg. “Elastic Alfven Waves in Elastic
Turbulence.” Nature Communications. Springer Nature, 2019. https://doi.org/10.1038/s41467-019-08551-0.
ieee: A. Varshney and V. Steinberg, “Elastic alfven waves in elastic turbulence,”
Nature Communications, vol. 10. Springer Nature, 2019.
ista: Varshney A, Steinberg V. 2019. Elastic alfven waves in elastic turbulence.
Nature Communications. 10, 652.
mla: Varshney, Atul, and Victor Steinberg. “Elastic Alfven Waves in Elastic Turbulence.”
Nature Communications, vol. 10, 652, Springer Nature, 2019, doi:10.1038/s41467-019-08551-0.
short: A. Varshney, V. Steinberg, Nature Communications 10 (2019).
date_created: 2019-02-15T07:10:46Z
date_published: 2019-02-08T00:00:00Z
date_updated: 2023-09-08T11:39:54Z
day: '08'
ddc:
- '530'
department:
- _id: BjHo
doi: 10.1038/s41467-019-08551-0
ec_funded: 1
external_id:
arxiv:
- '1902.03763'
isi:
- '000458175300001'
file:
- access_level: open_access
checksum: d3acf07eaad95ec040d8e8565fc9ac37
content_type: application/pdf
creator: dernst
date_created: 2019-02-15T07:15:00Z
date_updated: 2020-07-14T12:47:17Z
file_id: '6015'
file_name: 2019_NatureComm_Varshney.pdf
file_size: 1331490
relation: main_file
file_date_updated: 2020-07-14T12:47:17Z
has_accepted_license: '1'
intvolume: ' 10'
isi: 1
language:
- iso: eng
month: '02'
oa: 1
oa_version: Published Version
project:
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
publication: Nature Communications
publication_identifier:
issn:
- 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Elastic alfven waves in elastic turbulence
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 10
year: '2019'
...
---
_id: '6451'
abstract:
- lang: eng
text: Epidermal growth factor receptor (EGFR) signaling controls skin development
and homeostasis inmice and humans, and its deficiency causes severe skin inflammation,
which might affect epidermalstem cell behavior. Here, we describe the inflammation-independent
effects of EGFR deficiency dur-ing skin morphogenesis and in adult hair follicle
stem cells. Expression and alternative splicing analysisof RNA sequencing data
from interfollicular epidermis and outer root sheath indicate that EGFR con-trols
genes involved in epidermal differentiation and also in centrosome function, DNA
damage, cellcycle, and apoptosis. Genetic experiments employingp53deletion in
EGFR-deficient epidermis revealthat EGFR signaling exhibitsp53-dependent functions
in proliferative epidermal compartments, aswell asp53-independent functions in
differentiated hair shaft keratinocytes. Loss of EGFR leads toabsence of LEF1
protein specifically in the innermost epithelial hair layers, resulting in disorganizationof
medulla cells. Thus, our results uncover important spatial and temporal features
of cell-autonomousEGFR functions in the epidermis.
article_processing_charge: No
author:
- first_name: Nicole
full_name: Amberg, Nicole
id: 4CD6AAC6-F248-11E8-B48F-1D18A9856A87
last_name: Amberg
orcid: 0000-0002-3183-8207
- first_name: Panagiota A.
full_name: Sotiropoulou, Panagiota A.
last_name: Sotiropoulou
- first_name: Gerwin
full_name: Heller, Gerwin
last_name: Heller
- first_name: Beate M.
full_name: Lichtenberger, Beate M.
last_name: Lichtenberger
- first_name: Martin
full_name: Holcmann, Martin
last_name: Holcmann
- first_name: Bahar
full_name: Camurdanoglu, Bahar
last_name: Camurdanoglu
- first_name: Temenuschka
full_name: Baykuscheva-Gentscheva, Temenuschka
last_name: Baykuscheva-Gentscheva
- first_name: Cedric
full_name: Blanpain, Cedric
last_name: Blanpain
- first_name: Maria
full_name: Sibilia, Maria
last_name: Sibilia
citation:
ama: Amberg N, Sotiropoulou PA, Heller G, et al. EGFR controls hair shaft differentiation
in a p53-independent manner. iScience. 2019;15:243-256. doi:10.1016/j.isci.2019.04.018
apa: Amberg, N., Sotiropoulou, P. A., Heller, G., Lichtenberger, B. M., Holcmann,
M., Camurdanoglu, B., … Sibilia, M. (2019). EGFR controls hair shaft differentiation
in a p53-independent manner. IScience. Elsevier. https://doi.org/10.1016/j.isci.2019.04.018
chicago: Amberg, Nicole, Panagiota A. Sotiropoulou, Gerwin Heller, Beate M. Lichtenberger,
Martin Holcmann, Bahar Camurdanoglu, Temenuschka Baykuscheva-Gentscheva, Cedric
Blanpain, and Maria Sibilia. “EGFR Controls Hair Shaft Differentiation in a P53-Independent
Manner.” IScience. Elsevier, 2019. https://doi.org/10.1016/j.isci.2019.04.018.
ieee: N. Amberg et al., “EGFR controls hair shaft differentiation in a p53-independent
manner,” iScience, vol. 15. Elsevier, pp. 243–256, 2019.
ista: Amberg N, Sotiropoulou PA, Heller G, Lichtenberger BM, Holcmann M, Camurdanoglu
B, Baykuscheva-Gentscheva T, Blanpain C, Sibilia M. 2019. EGFR controls hair shaft
differentiation in a p53-independent manner. iScience. 15, 243–256.
mla: Amberg, Nicole, et al. “EGFR Controls Hair Shaft Differentiation in a P53-Independent
Manner.” IScience, vol. 15, Elsevier, 2019, pp. 243–56, doi:10.1016/j.isci.2019.04.018.
short: N. Amberg, P.A. Sotiropoulou, G. Heller, B.M. Lichtenberger, M. Holcmann,
B. Camurdanoglu, T. Baykuscheva-Gentscheva, C. Blanpain, M. Sibilia, IScience
15 (2019) 243–256.
date_created: 2019-05-14T11:47:40Z
date_published: 2019-05-31T00:00:00Z
date_updated: 2023-09-08T11:38:04Z
day: '31'
ddc:
- '570'
department:
- _id: SiHi
doi: 10.1016/j.isci.2019.04.018
external_id:
isi:
- '000470104600022'
file:
- access_level: open_access
checksum: a9ad2296726c9474ad5860c9c2f53622
content_type: application/pdf
creator: dernst
date_created: 2019-05-14T11:51:51Z
date_updated: 2020-07-14T12:47:30Z
file_id: '6452'
file_name: 2019_iScience_Amberg.pdf
file_size: 8365970
relation: main_file
file_date_updated: 2020-07-14T12:47:30Z
has_accepted_license: '1'
intvolume: ' 15'
isi: 1
language:
- iso: eng
license: https://creativecommons.org/licenses/by-nc-nd/4.0/
month: '05'
oa: 1
oa_version: Published Version
page: 243-256
publication: iScience
publication_identifier:
issn:
- 2589-0042
publication_status: published
publisher: Elsevier
quality_controlled: '1'
status: public
title: EGFR controls hair shaft differentiation in a p53-independent manner
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 15
year: '2019'
...
---
_id: '10879'
abstract:
- lang: eng
text: We study effects of a bounded and compactly supported perturbation on multidimensional
continuum random Schrödinger operators in the region of complete localisation.
Our main emphasis is on Anderson orthogonality for random Schrödinger operators.
Among others, we prove that Anderson orthogonality does occur for Fermi energies
in the region of complete localisation with a non-zero probability. This partially
confirms recent non-rigorous findings [V. Khemani et al., Nature Phys. 11 (2015),
560–565]. The spectral shift function plays an important role in our analysis
of Anderson orthogonality. We identify it with the index of the corresponding
pair of spectral projections and explore the consequences thereof. All our results
rely on the main technical estimate of this paper which guarantees separate exponential
decay of the disorder-averaged Schatten p-norm of χa(f(H)−f(Hτ))χb in a and b.
Here, Hτ is a perturbation of the random Schrödinger operator H, χa is the multiplication
operator corresponding to the indicator function of a unit cube centred about
a∈Rd, and f is in a suitable class of functions of bounded variation with distributional
derivative supported in the region of complete localisation for H.
acknowledgement: M.G. was supported by the DFG under grant GE 2871/1-1.
article_processing_charge: No
article_type: original
author:
- first_name: Adrian M
full_name: Dietlein, Adrian M
id: 317CB464-F248-11E8-B48F-1D18A9856A87
last_name: Dietlein
- first_name: Martin
full_name: Gebert, Martin
last_name: Gebert
- first_name: Peter
full_name: Müller, Peter
last_name: Müller
citation:
ama: Dietlein AM, Gebert M, Müller P. Perturbations of continuum random Schrödinger
operators with applications to Anderson orthogonality and the spectral shift function.
Journal of Spectral Theory. 2019;9(3):921-965. doi:10.4171/jst/267
apa: Dietlein, A. M., Gebert, M., & Müller, P. (2019). Perturbations of continuum
random Schrödinger operators with applications to Anderson orthogonality and the
spectral shift function. Journal of Spectral Theory. European Mathematical
Society Publishing House. https://doi.org/10.4171/jst/267
chicago: Dietlein, Adrian M, Martin Gebert, and Peter Müller. “Perturbations of
Continuum Random Schrödinger Operators with Applications to Anderson Orthogonality
and the Spectral Shift Function.” Journal of Spectral Theory. European
Mathematical Society Publishing House, 2019. https://doi.org/10.4171/jst/267.
ieee: A. M. Dietlein, M. Gebert, and P. Müller, “Perturbations of continuum random
Schrödinger operators with applications to Anderson orthogonality and the spectral
shift function,” Journal of Spectral Theory, vol. 9, no. 3. European Mathematical
Society Publishing House, pp. 921–965, 2019.
ista: Dietlein AM, Gebert M, Müller P. 2019. Perturbations of continuum random Schrödinger
operators with applications to Anderson orthogonality and the spectral shift function.
Journal of Spectral Theory. 9(3), 921–965.
mla: Dietlein, Adrian M., et al. “Perturbations of Continuum Random Schrödinger
Operators with Applications to Anderson Orthogonality and the Spectral Shift Function.”
Journal of Spectral Theory, vol. 9, no. 3, European Mathematical Society
Publishing House, 2019, pp. 921–65, doi:10.4171/jst/267.
short: A.M. Dietlein, M. Gebert, P. Müller, Journal of Spectral Theory 9 (2019)
921–965.
date_created: 2022-03-18T12:36:42Z
date_published: 2019-03-01T00:00:00Z
date_updated: 2023-09-08T11:35:31Z
day: '01'
department:
- _id: LaEr
doi: 10.4171/jst/267
external_id:
arxiv:
- '1701.02956'
isi:
- '000484709400006'
intvolume: ' 9'
isi: 1
issue: '3'
keyword:
- Random Schrödinger operators
- spectral shift function
- Anderson orthogonality
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1701.02956
month: '03'
oa: 1
oa_version: Preprint
page: 921-965
publication: Journal of Spectral Theory
publication_identifier:
issn:
- 1664-039X
publication_status: published
publisher: European Mathematical Society Publishing House
quality_controlled: '1'
scopus_import: '1'
status: public
title: Perturbations of continuum random Schrödinger operators with applications to
Anderson orthogonality and the spectral shift function
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 9
year: '2019'
...