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2020.05.04

カナダ アルバータ州のコンタクト・トレーシング・アプリ ABTrace Togehter

こんにちは、丸山満彦です。

カナダ アルバータ州[wikipedia](人口は約 400万人。人口密度は約6.4人/km2)のコンタクト・トレーシング・アプリ ABTrace Togehterがリリースされています。Deloitteが開発に関与しているようですね。。。契約額は最大で625,000ca$のようです。

PIAがアルバータ州情報・プライバシー委員会(Office of the Information and Privacy Commissioner of Alberta)に提出され、受け取られているようですが、このブログを書いている時点では見つけられませんでした。。。

アルバーター州

・202005.01 Technology to support COVID-19 response

ABTraceTogether

Office of the Information and Privacy Commissioner of Alberta

・2020.05.01 Commissioner Comments on Alberta’s Contact Tracing App

・2020.04.23 Commissioner Responds to Government of Alberta’s Contact Tracing App Announcement

 

メディア関係の記事が意外と深く議論していますので、参考になります。

Global News

・2020.05.01 Alberta launches ABTraceTogether app to improve contact tracing, fight COVID-19 spread by  

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..... The government and AHS worked with Deloitte to develop it, using similar technology used in Singapore as a model. However, the Alberta app collects less information than any other similar product being used by other jurisdictions (like Singapore, South Korea and Australia) to fight COVID-19.

.....

Once installed, the app uses a phone’s Bluetooth to log anytime it comes within two metres of another person with the app for a cumulative 15 minutes.

The phones detect each other and exchange anonymous encrypted data, the province said. Alberta’s chief medical officer of health, Dr. Deena Hinshaw, described it as an “encrypted digital handshake.” No information is uploaded at that time; it is just stored in the app.

Using the manual contact tracing process, if someone tests positive for COVID-19, they receive a phone call from an AHS contact tracer. Now, that person will ask if the patient has the ABTraceTogether app, and if so, if they consent to sharing its encounter history data.

If the person agrees, that information provides the health official with a phone number and duration of exposure for anyone that positive COVID-19 case had contact with.

“Even when app users who may have been exposed are contacted, user identities will not be shared,” Hinshaw said. “Users will merely be informed that they have come into close contact with someone who has tested positive for COVID-19.

“If you are diagnosed with COVID and you consent with the information on your phone being used, the contact tracer will be able to match the unique non-identifiable IDs on your phone with the registered users’ phone numbers via a merging of data.”

Then, AHS is able to notify them of the exposure, regardless of if the initial COVID-19 patient knows their name, has their number, or even remembers being in that location.

.....

“Ensuring this app is voluntary, collects minimal information, uses decentralized storage of de-identified Bluetooth contact logs, and allows individuals to control their use of the app are positive components. People diagnosed with COVID-19 also decide whether to disclose to public health officials the contact log stored on their phone,” Clayton said.

“My office received a privacy impact assessment on the app earlier this week. An initial review has been undertaken and we have sent questions to Alberta Health to clarify certain aspects of the PIA.

“For example, I am seeking confirmation that the data collected through this app is to be used for contact tracing, and not for any other purpose.”

Ontario’s former privacy commissioner has concerns.

“Phone numbers are easily linked to personally identifiable individuals,” Ann Cavoukian told Global News.

The Opposition NDP supports the intent of the ABTraceTogether app but says its effectiveness is dependent on many Albertans trusting it’s safe, secure and downloading it.

“Acceptance depends on trust, and for that, the government must be fully transparent about the app’s privacy risks, and the steps the government has taken to limit those risks,” said Heather Sweet, the NDP’s critic for Democracy and Ethics.
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Calgary Herald

・2020.05.03 Concerns surface over Alberta COVID-19 app's practicality and privacy

iPhoneの場合はアプリをフォアグランドにしておく必要があると書いていますね。。。

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..... One potential problem with the smartphone app is that iOS users — those who download the app on an iPhone, iPad or iPod Touch — will have to leave the app running in the foreground of their device, meaning it has to be visibly open on their screen. That means iOS users will have to keep their phone unlocked and set to the ABTraceTogether app for it to be effective.

The problem only exists on iOS — on Android devices, the app can run in the background. According to a 2019 Bloomberg report, 53 per cent of Canadian smartphones run iOS.

“If you switch apps, it stops working, and that’s a pretty major flaw, because just from a practical sense, who is actually going to be able to use that app?” said Peter McCaffrey, president of the Alberta Institute, a think-tank with libertarian leanings.

.....

The app was developed by Deloitte and was built off of source code from a similar app released by the Singapore government. It cost $625,000, a figure McCaffrey says is a cause for concern.

“It seems like a very high cost for an app that has already been developed,” he said. “I don’t think just because we’re in an emergency, we should ignore the cost of government services and programs.”
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Data Guidance

・2020.05.04 Alberta: OIPC issues statement following launch of Alberta Health contact tracing app

 

まるちゃんの情報セキュリティ気まぐれ日記

・2020.04.25 COVID-19 トラック・トレーシング・アプリについて米国・カナダ関連

 

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