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Long-Term Secure Time-Stamping using Preimage-Aware Hash Functions
Long-Term Security Timestamps Preimage Aware Hash Functions
2017/8/8
Commonly used digital signature schemes have a limited lifetime because their security is based on computational assumptions that will potentially break in the future when more powerful computers are ...
Patterning Barriers to Lateral Diffusion in Supported Lipid Bilayer Membranes by Blotting and Stamping
Patterning Barriers Lateral Diffusion Lipid Bilayer Membranes Blotting Stamping
2016/5/23
Two new methods are introduced for patterning fluid lipid bilayer membranes on solid supports. These methods are based on the observation that supported membranes undergo self-limiting lateral expansi...
Investigation of Contact Pressure Distribution on Sheet Metal Stamping Tooling Interfaces: Surface Modeling, Simulations, and Experriments
Contact Pressure Distribution Sheet Metal Stamping Tooling Interfaces Surface Modeling Simulations Experiments
2014/10/23
In stamping operations, sheet metal is formed into a desired shape by pressing it in a hydraulic or mechanical press between suitably shaped dies. As a predominant manufacturing process, sheet metal f...
Non-Interactive Time-Stamping and Proofs of Work in the Random Oracle Model
cryptographic protocols
2012/3/23
We construct a non-interactive scheme for proving computational work in the Random Oracle Model. Given a uniformly random ``puzzle'' $P <- {0,1}^n$ (where $n$ is the security parameter), a correspondi...
Trends of labor productivity in metal stamping industries
labor productivity metal stamping industries employee hour
2009/5/19
Overall growth in the annual rate of output per employee hour was sluggish from 1963 to 1983, but performance was stronger during 1972-83 for producers of automotive stampings, while it weakened in th...
On Optimal Hash Tree Traversal for Interval Time-Stamping
analysis of algorithms implementation complexity interval time-stamping
2009/4/15
Skewed trees constitute a two-parameter family of recursively constructed
trees. Recently, Willemson proved that suitably picked skewed trees are
space-optimal for interval time-stamping. At the sam...
Universally Composable Time-Stamping Schemes with Audit
Time-Stamping Provable Security One-Way Hash Functions Universal Composability
2009/2/16
We present a universally composable time-stamping scheme based on universal one-way hash functions.The model we use contains an ideal auditing functionality (implementable in the Common Reference Str...
On Universal Composable Security of Time-Stamping Protocols
time-stamping protocol universal composable security
2009/2/8
Time-stamping protocols, which assure that a document was
existed at a certain time, are applied to some useful and practical applications
such as electronic patent applications and so on. There are...
Knowledge-Binding Commitments with Applications in Time-Stamping(Full Version)
Knowledge-Binding Time-Stamping
2008/9/11
We prove in a non-black-box way that every bounded list and set commitment
scheme is knowledge-binding. This is a new and rather strong security
condition, which makes the security definitions for t...
New stamping process creates metallic interconnects, nanostructures
mechanical science electrochemical
2007/3/5
21-Feb-2007，CHAMPAIGN, Ill. -- Creating high-resolution metallic interconnects is an essential part of the fabrication of microchips and other nanoscale devices. Researchers at the University of Illin...