smart-tracing | Privacy-First Contact Tracing to Keep Communities Safe | Privacy library
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Privacy-First Contact Tracing to Keep Communities Safe
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QUESTION
Please consider the following:
I need to provide some R code syntax to analyse data with the flexsurv package. I am not allowed to receive/analyse directly or on-site. I am however allowed to receive the analysis results.
Problem
When we run the flexsurvreg() function on some data (here ovarian from the flexsurv package), the created object (here fitw) contains enough information to "re-create" or "back-engineer" the actual data. But then I would technically have access to the data I am not allowed to have.
ANSWER
Answered 2022-Mar-29 at 11:01Setting, e.g. fitw$data <- NULL will remove all the individual-level data from the fitted model object. Some of the output functions may not work with objects stripped of data however. In the current development version on github, printing the model object should work. Also summary and predict methods should work, as long as covariate values are supplied in newdata - omitting them won't work, since the default is to take the covariate values from the observed data.
QUESTION
I am using Angular Universal for most of my website so that I can pre-render the content for SEO. It is meant to be a public facing site.
I would like to be able to make certain components client-side rendered ONLY to avoid bundling content such as email addresses and social media links from being discoverable by web crawlers.
I used the Angular Universal generated application to create my app. Currently, ALL my components are being rendered server-side. I couldn't find any specific clear example where someone used Angular in an elegant manner to achieve this specific goal. My intent is make my contact info and social media links components completely client-side rendered and added to the DOM at runtime to avoid bots and web crawlers from seeing it.
How do others achieve this without doing something hacky?
...ANSWER
Answered 2022-Mar-14 at 23:59You can use isPlatformBrowser helper method for Angular and wrap all code in this helper method like below:
QUESTION
I want to use an open source app (https://github.com/NYRDS/remixed-dungeon), but the amount od tracking the app does is something else. The GPL (under which the app is licenced) allows me to change this. Is there a tool or a guide to do just that?
...ANSWER
Answered 2022-Mar-10 at 08:43First you need a bit of development experience, Java and Gradle in this case.
Then I would load the app project into Android Studio and compile it. You have to have no compile errors.
Then check the build.gradle files for ad libraries (e.g. entries starting with implementation or androidImplementation). Comment them one-by-one out and after commenting out one check for compile errors where code from this libraries is used.
Comment out also the code with errors because the library is no longer present. Repeat until all errors are fixed.
QUESTION
My ios app retrieves some data from third party servers during runetime. For privacy reasons, I want to hide the IP addresses of my users, in order to prevent those servers to know them. How can I do that ?
My idea is to set up a kind of "proxy server" or "VPN server" inbetween the app and the third party servers. Is that a good idea ?
Thanks for your help!
...ANSWER
Answered 2022-Feb-09 at 10:35Yes, proxying is the right way to do this. You could do it with a VPN, but that's overkill, and requires considerable setup on the client side which you don't control.
You can get a web server such as Nginx or Apache to act as a proxy directly through config options, or you can do it via scripting with PHP or whatever. I do the latter to provide a proxied service to gravatar.com. The principle is quite straightforward:
- Accept a request from your client.
- On your server side, make a request (using an HTTP library, such as Guzzle) to the 3rd party service to get whatever is needed.
- Parse the response from there and create a response suitable for your client.
This way the 3rd party service will only ever see the IP of your server, not your client, and you can choose exactly what data from the client you pass through. In my gravatar example, it sends an MD5 hash of the user's email address, which has its own privacy implications, but that's a separate problem!
QUESTION
I recently published an app to the App Store that reads several metrics from HealthKit. It all seems to be working correctly in the app (permissions screen loads fine and data is being read okay) but when I go to Settings > Privacy > Health > MY APP, there is just a blank screen with no data.
I've seen this bug with other apps (MyFitnessPal, Balance) and a forum recommended deleting and reinstalling, which fixed it for them. But it doesn't fix my app at all.
Can anyone think of something I might have missed that's creating this issue?
Thanks
...ANSWER
Answered 2022-Feb-08 at 20:19This should be addressed in iOS 15.4 Beta 1. Can you try there?
You should also be able to access your apps authorizations from within Health App. Go to Profile View and navigate to your app under the Apps view.
QUESTION
If I go to https://cats.tumblr.com/archive?x=y , what parts of that URL are leaked to the man-in-the-middle ISP? I know they'll see "tumblr", but will they also see
- cats
- archive
- x
- y
Also, if, for example, https://knowyourmeme.com uses an image stored on a separate URL ( https://i.kym-cdn.com/photos/images/original/002/185/700/4e8.png ), how much of that separate URL is exposed to the man in the middle? Just the kym-cdn? Or none of it, or what?
Lastly, is any significant information about the length of the URL exposed to the man-in-the-middle ISP?
...ANSWER
Answered 2022-Jan-20 at 10:26Edited 1/20/2022, thank to Synchro in the comments
- The domain name
https://this.part.here/not/this/part?or=this - and the hostname. Which can be found on unix systems inside
/etc/hostname
The domain name is leaked to the ISP via DNS request, and the hostname is leaked via SNI. Everything else is encrypted over TLS including the request URL and accompanied query parameters. However, if you use DNS over HTTPS (DoH) or DNS over TLS (DoT), these problems can be mitigated. ECH is a recent addition to the TLS 1.3 spec that fixes the hostname problem and has been automatically enabled alongside Firefox DoH since 2018.
If you're curious what you're currently leaking, you can check out Firefox's website data integrity tool here
QUESTION
I want to publish a simple app that doesn't collect any personal data. It is an offline game (noughts and crosses), that doesn't require any account, and stores only field state on the user's device. I don't have any server and don't transfer the data anywhere, so it's fully offline. But Google Play asks for a Privacy Policy. How can I get it? Is there any standard Privacy Policy for such type of application? Can I just write something like "We don't store and transfer any personal data"?
...ANSWER
Answered 2022-Jan-02 at 23:27Easiest way is just to use a privacy policy generator such as this one: https://app-privacy-policy-generator.firebaseapp.com/
It's simple to use and only takes a few minutes to get you a privacy policy
QUESTION
I am trying to implement App Tracking Transparency in my app. I tried to do this on first ViewControllor, but it crashes the app after uploading to the test flight.
After this, I found a lot of info that this should be done in appDelegate I did this way. Of course, I have set NSUserTrackingUsageDescription in Info.plist
I tried to figure it out with this post.
In the debugger, I always see "Not Determined". Could anyone please help with this?
...ANSWER
Answered 2021-Dec-22 at 10:53I found how to do this.
Add in your first ViewController
QUESTION
I want to implement local DP model using TFF, that is, each client trains it's own differentially private model and sends noisy gradients to the server, and the server just aggregates and distributes in a standard FL fashion. I tried changing the client optimizer to keras DP optimizer, but that didnt work. Any suggestions are appreciated.
...ANSWER
Answered 2021-Dec-20 at 09:45First, perhaps have a look at Differential Privacy in TFF tutorial which shows how to do central DP training in TFF. Once you understand that, I can see two different ways to change it to provide some local DP guarantees.
- Look at how the
tff.learning.dp_aggregatoris implemented. Instead of the pre-packagedtff.aggregators.DifferentiallyPrivateFactory, instantiate it with atfp.DPQueryobject that implements the local DP mechanism you are interested in. Perhaps an implementation you need already exists somewhere. - Implement a custom aggregator from scratch doing exactly what you need. See Implementing Custom Aggregations tutorial for a starting point.
QUESTION
This might be a really dumb question, but while trying to setup Cloudinary on my Nuxt application, I couldn't figure out how to utilise privateRuntimeConfig to pass the necessary keys to the Cloudinary plugin, because all of it is happening inside nuxt.config.ts.
Meaning, that at the same place where I use privateRuntimeConfig, inside nuxt.config.ts, is also where I need to pass them to the Cloudinary plugin configuration, but this won't work. So how do I go about this?
ANSWER
Answered 2021-Nov-04 at 18:54When using variables for modules like here (directly into nuxt.config.js/ts), you cannot reference the runtime variables.
Simply use it directly like process.env.CLOUDINARY_CLOUD_NAME.
More info on my complete answer here: https://stackoverflow.com/a/67705541/8816585
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