xamarin.forms – How can we check the liveness of any image using Cognitive Face API Services?

We are developing attendance app using Xamarin Forms and FACE API of Cognitive services. What we are doing is like this.

  1. Registering Photo : When user clicks on this button we open the mobile camera , user click his/her photograph and then we submit that image to Face API . No issue in that we have successfully implemented/registered the same using Cognitive Face API services.

  2. Verify User : When user clicks on this button again we open the camera, user click his/her photograph and then we send this image to FACE api for verification . No issue in that we have successfully implemented the same.

Now what issue we are facing is :-

On verification button, user shows his/her old saved photograph to camera and click its photo not the real live image. Obviously that matches the same and got verified successfully. Here we always want to take his/her live photo not the fake one because its attendance application also used to field staff. Any body can fool the app.

We want to stop clicking the fake images. We want to track liveness of the photo. If something available at camera level which can tell user not to show fake photos , show real live photo.

Any help/response is highly appreciable.

Regards

Prem Sharma

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amazon web services – Can’t Connect to an RDS from my home computer in AWS

I need to connect to an RDS from my home computer.

This is an established database, I’m migrating it to a new system.

I can not connect to it from my home computer.

I have set the security to Public Accessibility.

I’ve set VPC the Security rules to allows in bound connections.

What do I do next to debug it

RDS Screen
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Security Groups
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VPC
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I’ve included information on the Subnet is that relevant?

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project management – What is the best way to keep track of versions of multiple micro services delivered as part of a software solution?

I can’t speak toward “best”, but there are a couple tools that I’ve seen used or used myself. One such solution that has been adopted by Spring Cloud, Ubuntu, and a number of other products is Calendar Versioning (CalVer)

Calendar Versioning works like this:

  • The 4 digit year is the major version
  • All other version markers are for a whole release
  • This version is used collectively for a larger product, and individual components can have an independent version number

Example: 2021.0.1

I’ve used Release Train numbering. We break up our deliveries into consistently sized release trains, so internally we use RT25 to version the collective microservices. When we deliver to our customer, we simply alias the RT number with the customer’s version number–who uses Semantic Versioning (SemVer), but with their own semantics of how to increment the numbers. We do that because we’ve had cases where we thought the customer’s semantics would apply for a different number, but they surprised us.

That said, our individual libraries and microservices have their independent version numbering, and the RT version (or CalVer) applies to the collective for a particular release.

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Are all “hosted mining” services necessarily scams?

In 2014 or something, I paid a smaller sum of money to some company called “Cloudhashing” or something, which claimed that I was renting part of their Bitcoin mining pool and all I had to do was to pay that little sum and then wait for the coins to roll in.

I never got a single satoshi, as you can imagine.

But ever since then, I’ve seen numerous services where you apparently can pay a large amount of money to “rent a miner” which they host/set up, basically the exact same setup as the scam I fell for. That is, I’m not buying a miner that they ship to me which I then plug into my own local power. I never see/care about the unit; it’s “abstracted away” from me in the same manner that a “webhost” account is something abstract to me versus ordering a physical server which I keep running in my wardrobe.

It seems to me that it would indeed be possible for such a service to not be a scam. I mean, the argument usually goes like:

If they can just mine themselves and make more money, why would they sell this to you?

I get that argument, but at the same time, what if they don’t have the money up-front to pay for that extra miner (or part of it) unless I give them my money? Does it not make sense that they use the customers’ money to legitimately order more miners and have them set up in their optimized facility with cheap power and whatnot, which I could never do at home? Isn’t it a much more efficient setup that I simply pay them to enable them to add hashing power and then both of us make money, versus me ordering a soon-outdated mining unit which I cannot run here anyway?

What am I missing? Are there non-scam mining services? I want to make Bitcoin but I’m not going to waste any more money on scams.

amazon web services – Enable https on EC2 Instance


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bell lapadula – Security models used for paypal and financial services

What security model would be used for a company like paypal?

I have read about Bell La Padula, Biba and Brewer Nash I cannot really see which of these would be applicable to a system which deals with financial transactions.

Another thing I am struggling to get my head around is how deep the security model goes, does it cover things like physical access to buildings and data centres and vetting of staff or is it primarily concerned with access to files on an operating system?

At what point is a security model discussed, I have worked at start ups and for the health service and in the energy sector and whilst I am only working as a developer I had never heard of any of these models, for example at what point does a company like paypal, going from start up to multi national start to consider these things?

Any help would be much appreciated as I am totally new to the subject of security models.