3,804 research outputs found
Cloud Computing in the Quantum Era
Cloud computing has become the prominent technology of this era. Its elasticity, dynamicity, availability, heterogeneity, and pay as you go pricing model has attracted several companies to migrate their businesses' services into the cloud. This gives them more time to focus solely on their businesses and reduces the management and backup overhead leveraging the flexibility of cloud computing. On the other hand, quantum technology is developing very rapidly. Experts are expecting to get an efficient quantum computer within the next decade. This has a significant impact on several sciences including cryptography, medical research, and other fields. This paper analyses the reciprocal impact of quantum technology on cloud computing and vice versa
A formal definition and a new security mechanism of physical unclonable functions
The characteristic novelty of what is generally meant by a "physical
unclonable function" (PUF) is precisely defined, in order to supply a firm
basis for security evaluations and the proposal of new security mechanisms. A
PUF is defined as a hardware device which implements a physical function with
an output value that changes with its argument. A PUF can be clonable, but a
secure PUF must be unclonable. This proposed meaning of a PUF is cleanly
delineated from the closely related concepts of "conventional unclonable
function", "physically obfuscated key", "random-number generator", "controlled
PUF" and "strong PUF". The structure of a systematic security evaluation of a
PUF enabled by the proposed formal definition is outlined. Practically all
current and novel physical (but not conventional) unclonable physical functions
are PUFs by our definition. Thereby the proposed definition captures the
existing intuition about what is a PUF and remains flexible enough to encompass
further research. In a second part we quantitatively characterize two classes
of PUF security mechanisms, the standard one, based on a minimum secret
read-out time, and a novel one, based on challenge-dependent erasure of stored
information. The new mechanism is shown to allow in principle the construction
of a "quantum-PUF", that is absolutely secure while not requiring the storage
of an exponentially large secret. The construction of a PUF that is
mathematically and physically unclonable in principle does not contradict the
laws of physics.Comment: 13 pages, 1 figure, Conference Proceedings MMB & DFT 2012,
Kaiserslautern, German
Hardware Implementation of the GPS authentication
In this paper, we explore new area/throughput trade- offs for the Girault,
Poupard and Stern authentication protocol (GPS). This authentication protocol
was selected in the NESSIE competition and is even part of the standard ISO/IEC
9798. The originality of our work comes from the fact that we exploit a fixed
key to increase the throughput. It leads us to implement GPS using the Chapman
constant multiplier. This parallel implementation is 40 times faster but 10
times bigger than the reference serial one. We propose to serialize this
multiplier to reduce its area at the cost of lower throughput. Our hybrid
Chapman's multiplier is 8 times faster but only twice bigger than the
reference. Results presented here allow designers to adapt the performance of
GPS authentication to their hardware resources. The complete GPS prover side is
also integrated in the network stack of the PowWow sensor which contains an
Actel IGLOO AGL250 FPGA as a proof of concept.Comment: ReConFig - International Conference on ReConFigurable Computing and
FPGAs (2012
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