Besides attracting a billion dollar economy, Bitcoin revolutionized the field of digital
currencies and influenced many adjacent areas. This also induced significant scientific …

Cryptocurrencies are emerging as virtual financial systems based on their innovative
decentralized and distributed strategy in order to provide astonishing capabilities across a …

Proofs of work (PoW) have been suggested by Dwork and Naor (Crypto'92) as protection to
a shared resource. The basic idea is to ask the service requestor to dedicate some non …

Training machine learning (ML) models typically involves expensive iterative optimization.
Once the model's final parameters are released, there is currently no mechanism for the …

We describe several software side-channel attacks based on inter-process leakage through
the state of the CPU's memory cache. This leakage reveals memory access patterns, which …

“Bitcoin”[1] has been a successful implementation of the concept of p2p electronic cash.
Both professionals and the general public have come to appreciate the convenient …

Cryptography rearranges power: it configures who can do what, from what. This makes
cryptography an inherently\textit {political} tool, and it confers on the field an intrinsically\textit …

Ad hoc networks rely on the cooperation of the nodes participating in the network to forward
packets for each other. A node may decide not to cooperate to save its resources while still …

Wireless networks are vulnerable to many identity-based attacks in which a malicious device
uses forged MAC addresses to masquerade as a specific client or to create multiple …

Proof-of-work is a central concept in modern cryptocurrencies and denial-ofservice
protection tools, but the requirement for fast verification so far has made it an easy prey for …