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From Communications of the ACM

Technical Perspective: The Rewards of Selfish Mining

"Majority Is Not Enough: Bitcoin Mining Is Vulnerable," by Eyal and Sirer, questions the 2009 Bitcoin white paper's implicit assumption of perfect information—that...

Majority Is Not Enough
From Communications of the ACM

Majority Is Not Enough: Bitcoin Mining Is Vulnerable

We propose a practical modification to the Bitcoin protocol that protects Bitcoin in the general case.

From Communications of the ACM

Technical Perspective: A Graph-Theoretic Framework Traces Task Planning

In "Time-Inconsistent Planning: A Computational Problem in Behavioral Economics," Kleinberg and Oren describe a graph-theoretic framework for task planning with...

Time-Inconsistent Planning
From Communications of the ACM

Time-Inconsistent Planning: A Computational Problem in Behavioral Economics

We propose a graph-theoretic model of tasks and goals, in which dependencies among actions are represented by a directed graph, and a time-inconsistent agent constructs...

From Communications of the ACM

Technical Perspective: Designing Algorithms and the Fairness Criteria They Should Satisfy

"Which Is the Fairest (Rent Division) of Them All?" focuses on the problem of rent division, and stands out in the variety of techniques applied to arrive at a...

Which Is the Fairest (Rent Division) of Them All?
From Communications of the ACM

Which Is the Fairest (Rent Division) of Them All?

What is a fair way to assign rooms to several housemates, and divide the rent between them? We develop a general algorithmic framework that enables the computation...

From Communications of the ACM

Technical Perspective: Can High Performance Be Portable?

"Halide: Decoupling Algorithms from Schedules for High-Performance Image Processing" by Ragan-Kelley et al. on the image processing language Halide explores a substantially...

Halide
From Communications of the ACM

Halide: Decoupling Algorithms from Schedules For High-Performance Image Processing

We propose a new programming language for image processing pipelines, called Halide, that separates the algorithm from its schedule.

From Communications of the ACM

Technical Perspective: Solving Imperfect Information Games

"Heads-Up Limit Hold'em Poker Is Solved," by Michael Bowling, et al., takes the counterfactual regret minimization method for approximating a Nash equilibrium to...

Heads-Up Limit Hold'em Poker Is Solved
From Communications of the ACM

Heads-Up Limit Hold'em Poker Is Solved

This paper is an extended version of our original 2015 Science article, with additional results showing Cepheus' in-game performance against computer and human...

From Communications of the ACM

Technical Perspective: The State (and Security) of the Bitcoin Economy

"A Fistful of Bitcoins" examines, in the context of Bitcoin, what we could learn by studying the patterns encoded in a complete record of every single financial...

A Fistful of Bitcoins
From Communications of the ACM

A Fistful of Bitcoins: Characterizing Payments Among Men with No Names

Bitcoin has the unintuitive property that while the ownership of money is implicitly anonymous, its flow is globally visible. In this paper we explore this unique...

From Communications of the ACM

Technical Perspective: The Interplay of Neuroscience and Cryptography

An ideal scheme for password storage would enable a password with more than 20 bits of randomness to be input and output from the brain of a human being who is...

Neuroscience Meets Cryptography
From Communications of the ACM

Neuroscience Meets Cryptography: Crypto Primitives Secure Against Rubber Hose Attacks

We present a defense against coercion attacks using the concept of implicit learning from cognitive psychology. We use a carefully crafted computer game to allow...

From Communications of the ACM

Technical Perspective: Circuit Placement Challenges

For a semiconductor circuit with billions of transistors, finding desired locations of circuit components is a challenging task that substantially impacts circuit...

SimPL: An Algorithm For Placing VLSI Circuits
From Communications of the ACM

SimPL: An Algorithm For Placing VLSI Circuits

VLSI placement optimizes locations of circuit components so as to reduce interconnect. We propose an algorithm for large-scale placement that outperforms prior...

From Communications of the ACM

Technical Perspective: Visualization, Understanding, and Design

Photographs capture the moment; paintings convey perception, impression, and feeling; illustrations tell stories. Computer graphics aims to enrich all these artistic...

From Communications of the ACM

Illustrating How Mechanical Assemblies Work

How-things-work visualizations use a variety of visual techniques to depict the operation of complex mechanical assemblies. We present an automated approach for...

From Communications of the ACM

Technical Perspective: Making Browser Extensions Secure

Vulnerabilities in browsers and their extensions have become the primary venue through which cyber criminals compromise the security...

Vetting Browser Extensions For Security Vulnerabilities with VEX
From Communications of the ACM

Vetting Browser Extensions For Security Vulnerabilities with VEX

The browser has become the de facto platform for everyday computation and a popular target for attackers of computer systems. Among the many potential attacks that...
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