Let’s say I use a public dictionary to encode $9.99 as an object because it keeps coming up. Then, we have inflation and people come up with a new code for $10.99. An agency monitoring the public dictionary would be able to infer the rate of inflation in my country. - Adrian On Fri, Jul 24, 2020 at 11:20 AM Manu Sporny <msporny@digitalbazaar.com> wrote: > On 7/24/20 11:11 AM, Adrian Gropper wrote: > > There’s a rather esoteric attack on dictionary-based compression in > > general. As the process of refining a public dictionary becomes more > > efficient, we get a kind of traffic analysis or inverse differential > > privacy effect. I don’t doubt the value of dictionary-based compression > > but let’s keep entropy in mind. > > Could you elaborate more, Adrian? I'm not following. > > Perhaps define what the esoteric attack on dictionary-based compression is? > > -- manu > > -- > Manu Sporny - https://www.linkedin.com/in/manusporny/ > Founder/CEO - Digital Bazaar, Inc. > blog: Veres One Decentralized Identifier Blockchain Launches > https://tinyurl.com/veres-one-launches >
Received on Friday, 24 July 2020 15:31:23 UTC