Friction Pressure Correlation for Guar-Based Hydraulic Fracturing Fluids

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مقاله SPE شماره 71074

Handling, Treatment and Transportation of Fluids Tailor-Made for Faja Crudes

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مقاله SPE 71094

Pressure Analysis for a Well Intersected by a Hydraulic Fracture with Multiple Segments

اختصاصی از فی ژوو Pressure Analysis for a Well Intersected by a Hydraulic Fracture with Multiple Segments دانلود با لینک مستقیم و پر سرعت .

مقاله SPE شماره 71035

Inclusive Urban Design Streets for Life

اختصاصی از فی ژوو Inclusive Urban Design Streets for Life دانلود با لینک مستقیم و پر سرعت .

Foreword ix
Preface xi
The authors xiii
Acknowledgements xv
List of figures and tables xvii
Structure of the book xxiii
Part 1 Streets for Life: Why? 1
Chapter 1 Origins of the Streets for Life concept 3
Chapter 2 The need for dementia-friendly streets 17
Chapter 3 Older people’s experiences of their local streets 33
Part 2 Streets for Life: How? 49
Introduction to Part 2 50
Chapter 4 Familiarity 51
Chapter 5 Legibility 64
Chapter 6 Distinctiveness 78
Chapter 7 Accessibility 92
Chapter 8 Comfort 104
Chapter 9 Safety 115
Part 3 Streets for Life: The Future? 129
Chapter 10 Streets for Life in practice 131
Chapter 11 Going further with Streets for Life 150
Bibliography 166
Index 172

 

 

دانلود مقاله Understanding security failures of two-factor authentication schemes for real-time applications in hierarchical wi

اختصاصی از فی ژوو دانلود مقاله Understanding security failures of two-factor authentication schemes for real-time applications in hierarchical wireless sensor networks - انتشار 2014 دانلود با لینک مستقیم و پر سرعت .

• Contents lists available at ScienceDirect
  Ad Hoc Networks
• ADHOC 1019 No. of Pages 15, Model 3G
  27 March 2014
• Ding Wang^, ,Ping Wang

a b s t r a c t
Understanding security failures of cryptographic protocols is the key to both patching 
existing protocols and designing future schemes. In this work, we investigate two recent 
proposals in the area of smart-card-based password authentication for security-critical 
real-time data access applications in hierarchical wireless sensor networks (HWSN). Firstly, 
we analyze an efficient and DoS-resistant user authentication scheme introduced by Fan 
et al. in 2011. This protocol is the first attempt to address the problems of user authenti- 
cation in HWSN and only involves lightweight cryptographic primitives, such as one- 
way hash function and XOR operations, and thus it is claimed to be suitable for the 
resource-constrained HWSN environments. However, it actually has several security loop- 
holes being overlooked, and we show it is vulnerable to user anonymity violation attack, 
smart card security breach attack, sensor node capture attack and privileged insider attack, 
as well as its other practical pitfalls. Then, A.K. Das et al.’s protocol is scrutinized, and we 
point out that it cannot achieve the claimed security goals: (1) It is prone to smart card 
security breach attack; (2) it fails to withstand privileged insider attack; and (3) it suffers 
from the defect of server master key disclosure. Our cryptanalysis results discourage any 
practical use of these two schemes and reveal some subtleties and challenges in designing 
this type of schemes. Furthermore, using the above two foremost schemes as case studies, 
we take a first step towards investigating the underlying rationale of the identified security 
failures, putting forward three basic principles which we believe will be valuable to proto- 
col designers for advancing more robust two-factor authentication schemes for HWSN in 
the future.