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5
votes
1answer
59 views

How to construct this generalized xor without needing an extra vector?

Operator - Generalized Symmetric Difference If you take binary xor and generalize it to other radices you can do so by the absolute value of the difference of each element in a radix vector. However ...
4
votes
2answers
128 views

Minimizing the full adder - where did this XOR come from?

When minimizing the full adder, I don't understand why $A(\bar{B}\bar{C} + BC)$ reduces to $A\overline{(B\oplus{C})}.$ $(\bar{B}\bar{C} + BC)\to (B\oplus{C})$ is partially decipherable, but why is ...
2
votes
1answer
564 views

One time pad, get plaintext using ciphers encoded with the same key

I'm trying to solve a problem: I have 11 ciphers encoded with the same key. My aim is to decode target cipher. If I do xor C1, C2 (ciphers encoded with the same key) I do get M1 xor M2 (where M1, M2 ...
5
votes
3answers
336 views

How can I find minimum number required to add to sequence such that their xor becomes zero

Given a sequence of natural numbers, you can add any natural number to any number in the sequence such that their xor becomes zero. My goal is to minimize the sum of added numbers. Consider the ...