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A Note on the (Im)possibility of Verifiable Delay Functions in the Random Oracle Model
Verifiable Delay Functions Random Oracle Model
2019/6/6
Boneh, Bonneau, B{\"u}nz, and Fisch (CRYPTO 2018) recently introduced the notion of a \emph{verifiable delay function} (VDF). VDFs are functions that take a long \emph{sequential} time TT to compute, ...
A Verifiable Delay Function (VDF) is a function that takes at least TT sequential steps to evaluate and produces a unique output that can be verified efficiently, in time essentially independent of TT...
Continuous Verifiable Delay Functions
Verifiable delay functions continuous verifiability randomness beacons
2019/6/4
We introduce the notion of a continuous verifiable delay functioncontinuous verifiable delay function (cVDF): a function gg which is (a) iteratively sequential---meaning that evaluating the iteration ...
Non-interactive Cryptographic Timestamping based on Verifiable Delay Functions
non-interactive cryptographic timestamping universal composability verifiable delay functions
2019/3/1
We present the first treatment of non-interactive publicly-verifiable timestamping schemes in the Universal Composability framework. Similar to a simple construction by Mahmoody et al., we use non-par...
A note on isogeny-based hybrid verifiable delay functions
verifiable delay function time-lock puzzle isogeny-based cryptography
2019/3/1
Using the idea behind the recently proposed isogeny- and paring-based verifiable delay function (VDF) by De Feo, Masson, Petit and Sanso, we construct an isogeny-based VDF without the use of pairings....
Verifiable Delay Functions from Supersingular Isogenies and Pairings
Verifiable Delay Function Isogenies Pairings
2019/2/25
We present two new Verifiable Delay Functions (VDF) based on assumptions from elliptic curve cryptography. We discuss both the advantages and some drawbacks of our constructions, we study their securi...
The consensus protocol underlying Bitcoin (the blockchain) works remarkably well in practice. However proving its security in a formal setting has been an elusive goal. A recent analytical result by P...
A verifiable delay function (VDF) is an important tool used for adding delay in decentralized applications. This short note briefly surveys and compares two recent beautiful Verifiable Delay Functions...
We construct a verifable delay function (or unique publicly verifiable proof of sequential work) by showing how the Rivest-Shamir-Wagner time-lock puzzle can be made publicly verifiable.
We study the problem of building a verifiable delay function (VDF). A VDF requires a specified number of sequential steps to evaluate, yet produces a unique output that can be efficiently and publicly...
ATMOSPHERIC PHASE DELAY CORRECTION OF D-INSAR BASED ON SENTINEL-1A
Atmospheric Phase Sentinel-1A, D-InSAR Tropospheric Delay Maps GACOS Subsidence Monitoring Yellow River Delta
2018/5/14
In this paper, we used the Generic Atmospheric Correction Online Service for InSAR (GACOS) tropospheric delay maps to correct the atmospheric phase delay of the differential interferometric synthetic ...
ATMOSPHERIC PHASE DELAY IN SENTINEL SAR INTERFEROMETRY
Interferometric SAR differential interferometry tropospheric path delay
2018/5/14
The repeat-pass Synthetic Aperture Radio Detection and Ranging (RADAR) Interferometry (InSAR) has been a widely used geodetic technique for observing the Earth’s surface, especially for mapping the Ea...
Compact Energy and Delay-aware Authentication
Applied cryptography delay-aware authentication real-time networks
2018/1/11
Authentication and integrity are fundamental security services that are critical for any viable system. However, some of the emerging systems (e.g., smart grids, aerial drones) are delay-sensitive, an...
Failure To Understand Risks May Lead To Dangerous Delay In Seeking Medical Care（图）
Failure To Understand Risks Dangerous Delay Seeking Medical Care
2017/12/19
Making medical decisions for yourself or a loved one is challenging. Survival statistics, drug effectiveness rates and other numbers that convey risk factors and medical information may seem like they...
To protect integrated circuits against IP piracy, Physically Unclonable Functions (PUFs) are deployed. PUFs provide a specific signature for each integrated circuit. However, environmental variations,...