Also, redacting text by blurring doesn't work well. If it's a screenshot (i.e. an exact representation, not something like a photo), you can usually try various

Also, redacting text by blurring doesn't work well. If it's a screenshot (i.e. an exact representation, not something like a photo), you can usually try various combinations of characters and see what creates the same blurring pattern. If you know (or correctly guess) the exact parameters of the blur, this works far beyond what most people would consider recoverable by looking at it.