photoshop – Is it possible to re-focus (recover) an intentionally blurred image?

I work in data security and follow some data security news, images with data hidden by bluring and other image manipulation are “broken” all the time.

Digital filters in software work by taking the image data, doing some math on it and producing the modified image.

Unlike images that are shot out of focus in camera, with digitally blured images we know exactly the math formula the software used – and often we can reverse the formula and get the original image back (sometimes with some quality loss)

I have no idea what Picasa soft focus uses and I don’t know if it’s reversible, also I’m not going to analyze it, treat this answer as a general warning not as a review of Picasa’a soft focus filter’s security

Even if we can’t un-blur the image often it’s possible to recognize the blured person/object/text/whatever by bluring sections from other images and comparing them (because if we take two similar image and apply the same math to both we get two similar changed images).

So, your bluring method will stop the casual surfer but not anyone who really want to get the data, never use it to hide really sensitive data (especially not text or numbers), be careful and if you want to hide something just paint over it with a solid color (and check it’s also hidden in thumbnails, preview images, undo histories and such).

firewalls – Is it possible to intentionally cause Google and AWS to block my IP address?

It may sound a little weird. I am validating one of my possible research ideas where I want to see if I can intentionally and effectively make websites such as Google and AWS to block my IP. By “block”, I mean it won’t let me directly access the service, but not necessarily blacklist my IP. For example, the website will ask me to solve a ReCaptcha before I can access its service, instead of telling me service is unavailable.

I know if I send a large number of requests in a short time (i.e., using DoS) it is very likely that I can make it work, but I wonder if there is any other “efficient” way to make it happen. From what I have found here:, it mentioned Google may block the following:

  • Sending searches from a robot, computer program, automated service, or search scraper
  • Using software that sends searches to Google to see how a website or webpage ranks on Google
  • Using an app, program or script to perform a large number of searches in a short time

Is it possible that I mimic such a request and cause myself to be blocked in just one or a few requests?

forms – Ways and instructions to tell a user to intentionally miss a multiple choice question?

I’m currently brainstorming possible solutions to this UX question. In a multiple choice activity (not a quiz/form), if a user correctly answers a question, before they move on to the next question, I want to encourage the user to still click on the wrong answers and see the feedback from the wrong answers, so they understand why the wrong answer is wrong.

My first question is placement of these instructions:
I was thinking about putting optional instructions either before the question, or after the last multiple choice answer. The reason I suggest the latter is that these set of instructions are rather unique, and could possibly disrupt the natural user flow of reading a question and answering the questiion.

My second question is about the actual contents of the instructions are a question mark to me. I was thinking:

  1. Direct Approach: If you get the answer right, please also take a look at the other answers to see why they’re wrong!
  2. Subtle approach: Choose the best answer, but be sure to go through all the answers later!

I was also wondering in terms of user experience if it would make more sense to put these “instructions” after the user has successfully answered thee question, rather than before?

I need help) Crypto Exchange intentionally delays my withdrawal. How can I take legal action in this regard?

I have been submitting a KYC document and trying to contact their support team.

They just made excuses about the delay and gave me a false answer.

If I am a US merchant USA And I use a Hong Kong platform, what significant legal action can I take to change the current situation?

mariadb – The process was intentionally killed – now the process is still shown in "show process list"

We had a long running MariaDB process (40 hours), so I removed the thread. But, the thread is still there, with:

a "Command" field of "Assassinated".
a "Status" of "Table Unlock".
an "Information" of "insert in …"

What does this mean? More importantly, how do I get rid of it?

Version: MariaDB-10.3.5


United States: Do airlines or air traffic controllers intentionally try to get some flights to land early?

On some recent US domestic flights. UU., The flight arrived at its destination before the expected duration, but then got stuck waiting on the runway waiting for the assigned door to open.

Do airlines and / or air traffic controllers intentionally try to get some flights to land early? If so, what is the point if a flight lands before the boarding gate arrives?

javascript: will the callback be invoked again after the main function is completed, while the callback is invoked once intentionally in the main function?

Use this code as a demonstration:

            const timeFuncRuntime = funcParameter => {
let's t1 = ();
funcParameter ();
be t2 = ();
returns t2 - t1;

const remind = () => console.log (& # 39; competes for callback & # 39;);

console.log (timeFuncRuntime (remember));

I've tried Chrome, it's only invoked once (the call intentionally). so my conclusion is that the call will be invoked once, either in the body of the main function (if it is called) or after the main function is completed, is it correct?

How can I intentionally send spam mail to someone? [on hold]

I want this email to go to your junk mail, no matter how you type it, is it still working?