Addax: A fast, private, and accountable ad exchange infrastructure
Addax: A fast, private, and accountable ad exchange infrastructure
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发表时间：
2022
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通讯作者：
Ke Zhong;Yiping Ma;Yifeng Mao;Sebastian Angel
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作者：
Ke Zhong;Yiping Ma;Yifeng Mao;Sebastian Angel
。本文提出了Addax，一种快速的、可验证的、私人的在线广告交换。当用户访问支持广告的网站时，Addax会运行类似于领先交易所的拍卖；Addax请求投标，选择获胜者，收取费用，并将广告显示给用户。一个关键的区别是，Addax拍卖中的出价是保密的，拍卖结果是可以公开核实的。Addax通过将公共可验证性添加到Prio(NSDI‘17)中的仿射可聚集编码并基于它们构建拍卖协议来实现这些特性。我们通过广域网实施的Addax有数百个投标人，作为非私有和不可验证的交换，每秒可以运行大约一半的拍卖，同时在不到600毫秒的时间内向用户交付广告，而几乎不需要额外的带宽。这种效率使Addax成为第一个能够为这个原本不透明的生态系统带来透明度的架构。
. This paper proposes Addax, a fast, verifiable, and private online ad exchange. When a user visits an ad-supported site, Addax runs an auction similar to those of leading exchanges; Addax requests bids, selects the winner, collects payment, and displays the ad to the user. A key distinction is that bids in Addax’s auctions are kept private and the outcome of the auction is publicly verifiable. Addax achieves these properties by adding public verifiability to the affine aggregat-able encodings in Prio (NSDI’17) and by building an auction protocol out of them. Our implementation of Addax over WAN with hundreds of bidders can run roughly half the auctions per second as a non-private and non-verifiable exchange, while delivering ads to users in under 600 ms with little additional bandwidth requirements. This efficiency makes Addax the first architecture capable of bringing transparency to this otherwise opaque ecosystem.