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Apr
20
awarded  Teacher
Apr
20
awarded  Organizer
Apr
20
revised How many scientists can survive?
Clarified and corrected some English, added [puzzle] tag, and removed the comment at the end (it can be added back in, but I didn't feel it was necessary for the question)
Apr
20
awarded  Commentator
Apr
20
comment How many scientists can survive?
@Quincunx For the first question, I'm playing with an idea for how to save people by changing the ordering of answering. And for the second question, I just wanted to double check that the "after everybody finished saying a number" wasn't a mistranslation.
Apr
20
comment How many scientists can survive?
Is there any forced order in which the scientist needs to say a number, or can they answer in any order? Does each scientist die immediately after having said their number, or are they killed after ALL numbers have been said?
Apr
20
suggested approved edit on How many scientists can survive?
Oct
28
revised Will XORing any data with random data produce a random result?
added 72 characters in body
Oct
28
comment Will XORing any data with random data produce a random result?
I'm a programmer, not a mathematician, so feel free to edit my question to use proper mathematical notation or terminology.
Oct
28
comment Will XORing any data with random data produce a random result?
My gut feeling tells me Yes, all output will be completely random and unpredictable. I'd prefer a proof (logical or mathematical) rather than relying on "feels right".
Oct
28
asked Will XORing any data with random data produce a random result?
Jul
15
revised What is the “average time remaining” when guessing a random value?
added 74 characters in body
Jul
15
comment What is the “average time remaining” when guessing a random value?
As I said, I don't know much mathematical terminology beyond what is found in Geometry and basic Calculus, so please edit the tags or any wording as needed.
Jul
15
asked What is the “average time remaining” when guessing a random value?
Mar
29
comment Is there a hashing algorithm that can be done on paper?
@wendy.krieger That still isn't what I am referring to, you are talking about public key cryptography. What I am referring to is how user passwords are stored in a site's database; rather than store the password, a hash of the password is stored, and the password they actually typed in is forgotten by the server side. Later, when you want to validate a user's password, you hash the value they entered, and compare that to the hashed value stored in the database. I think this video explains that way hashing is used: youtube.com/watch?v=8ZtInClXe1Q
Mar
29
awarded  Informed
Mar
29
comment Is there a hashing algorithm that can be done on paper?
@wendy.krieger I edited my question to clarify what I'm looking for, and neither part of your answer really fits what I seek.
Mar
29
revised Is there a hashing algorithm that can be done on paper?
added 26 characters in body
Mar
29
comment Is there a hashing algorithm that can be done on paper?
@JiK That is going to be limited by how much data is contained in the resulting hash. Just for demonstration purposes, two inputs that produce the same hash are fine so long as there are maybe a hundred possible different values they could result in. However, if there are only a handful of possible results, such as the suggested using mod 13 or mod 10, that is not good enough, and would only confuse the student.
Mar
29
comment Is there a hashing algorithm that can be done on paper?
@wendy.krieger That's how it's used for files, however, one can just as easily (and developers do) hash a password to "hide" the original value. For all intents and purposes, the original value is "lost".