Cryptography Definition and 67 Threads

Hello, My name is Mason C. Turner and I work in the cybersecurity field. My background includes both military communications as well as private sector experience. According to the laws of physics, to the best of my understanding information and energy are directly interchangeable in a...

It starts at 6:16 It's the part where he's pointing his hand in this picture. I didn't get it although it's pretty mechanical, so I'd like to learn that technique as this is really useful in RSA algorithm(rather than having to memorize some values). I've been searching for a method like that...

I would like to invite your members to participate in the ZPrize competition. ZPrize is an industry-wide competition, modeled after the XPrize, to accelerate zero-knowledge cryptography. We have over 39 leading zero-knowledge technology companies contributing to this effort donating $7 million...

What does mean spinel structure has F d3m space group? I know F is for face centred cubic, 3 is 3-fold symmetry and m is mirror, but I don't know what means "d"?

Is it likely that this year's Nobel prize could be awarded to the field of quantum cryptography with Charles H Bennet, Gilles Brassard and Artur Ekert as possible nobel laureate candidates?

Conditions of the problem: y =/= a^2 (mod pq) -y =/= a^2 (mod pq) p = 3 (mod 4) q = 3 (mod 4) (a) We assume y is both square (mod p) and (mod q). Then, b^2 = y (mod p) b^2 = y (mod q) b^2 = y + pk b^2 = y + qr pk = qr ? (should we assume b is the same between the two equations?) (b) -y = d^2...

Here is my attempt When we raise both sides to the power (p-1)/2, we get x^(p-1)= -1^[(p-1)/2](modp) Looking at p=3(mod4), the possible values of p are {3, 7, 11, 19, 23, 31...}. Putting these values of p into (p-1)/2 we get odd integers. {1, 3, 5, 9, 11, 15...}. So we have x^(p-1) =...

OFFICIAL SOLUTION: d=e^(-1) mod 160=107 mp= c^(d) mod p=7 mq:=c^(d) mod q=7 MY THOUGHTS: I understand how d = 107, but I got that by using m = (17-1)(11-1) = 160. What I don't understand is the next two lines (from the official solution). I am aware of the P = C^d mod n (decryption) formula...

I have some curiosity about MIM attack in a paper that I have been found before. The diagram shows the MIM attack between Alice and Bob: I found that the sentences state: "We consider that the transmittance of the quantum channel is t. If Alice sends pulses with a mean photon number of N...

May I know how to solve the equation as below: (1) y2 = x3 + x + 1 mod 17 Finding Inverses Finding Points on the Curve (2) y2 = x3 + 3x + 1 mod 13 Finding Inverses Finding Points on the Curve

Hey guys, I just bought the book Elementary Cryptanalysis: A Mathematical Approach by Abraham Sinkov, yet before I start it, I would like to know if there are any prerequisites I should know about as I am 16 and I still haven't even taken all of high school mathematics although I am self...

Ever wonder how the famous Enigma Machine worked? Mathematician and cryptography expert Dr. James Grime takes one apart to demonstrate how it created complex codes.

I've been trying to solve this question for quite a while now. I watched a ton of videos on RSA. But whenever I try to solve it I get weird answers. Can some pls give me a hint or their method of solving it. An answer to the question also would be fine.

Hi everyone, I am trying to learn the underlying number theory concepts behind cryptography, and I was wondering if anyone knows of good resources for learning about number theory as applied to cryptography. I was hoping to practice writing proofs as well. Thanks!

Cryptography is based on reason-result chains like hash functions: which are inexpensive to propagate in the intended direction, but seem hard to reverse. However, decomposing them into satisfaction of simple (direction-agnostic) relations like 3-SAT clauses, may bring a danger of existence of...

I was just reading a cryptography book and have a question about something the author states I highlighed the statement in yellow and included a pictures. So I was wondering if the function could be written as E(M,K) = C instead of Ek(M)=C since the fact that E is dependent on K. If not why...

In a recent article (I've lost the reference, but it doesn't matter) it said that employing entangled photons is superior to the usual one way transmission of photons from Alice to Bob for creating a one time pad. It gave no justification for this claim. Can anyone provide me with one?

Please correct me if I am wrong. To my understanding , given a '##m##' multivariate set of equations in '##n##' variables in a integer field '##F##' is hard to solve, even in case of ##MQ(multiquadratic)## usually with field having characteristic as '##2##'. Where in case of ##DEHP(Diophatine...

Where all can I apply to pursue a MS in applied Math after acquiring a BS in Math as I am not interested in doing a PhD.

Hey! :o I am taking the course cryptography this semester and I will have a presentation at the end of the semester. Could you give me some information about the following topics: - An electronic voting system - Lattices and lattice reduction What are these topics about?? Which one...

Firstly, I apologise for any lack of understanding, incorrect assumptions or misinterpretations of the very little I know about physics, quantum mechanics & quantum computing. I am not an academic, scientist or mathematician, but a software engineer with an interest in quantum computing and...

+David West Heres What I got as far as the hash is concerned. Heres my indexing functions First We Have this function for fast indexing of the hash. ZequebaHashB[bvc_, yvc_, avc_] := {Drop[Flatten[Reap[ Module[{a34 = bvc, a35 = yvc, rt2 = avc, z75, zler}, z75 = 1; zler...

I'm finishing a B.S. in math and have been getting a bit more into physics lately. I'm on track for a second major in either physics or Russian, but not super concerned about finishing - I'm applying to grad programs in pure math. I'm particularly interested in algebraic geometry, combinatorics...

Hey! :o Could you give me some information about the subject Cryptography?? What is it about?? (Wondering) Are there required knowledges?? (Wondering)

The recent case 'datagate' suggests me to prose to You a question I didn.t resolve completely. Let's suppose that we have a plaintext $p_{n}$ and we code it with a key $k_{n}$ generating a chipertext... $\displaystyle c_{n} = p_{n} + k_{n}\ (1)$ ... where the sum is modulo some 'large...

Hi I am a first year student studying mathematics. I have been experimenting with various subjects to find my thing, and I think I am interested in discrete mathematics, particulary in number theory and cryptography. 1) But it seems like, there aren't many companies that are explicitly...

Prove that the following definition cannot be satisfied if Π can encrypt arbitrary-length messages and the adversary is not restricted to outputting equal-length messages in experiment PrivKeavA,∏. A prive-key encryption scheme ∏=(Gen, Enc, Dec) has indistinguishable encryptions in the...

Hello Forum, If Alice wants to send a secret message to Bob, she has to encrypt it first to keep the message secure. Who issues the public key in this case and who uses the private key? thanks fisico30

I was just wondering what are some applications of prime numbers other than cryptography? Also i heard that there is no certain *equation or prediction of Prime numbers? For example, there is no way to explain prime numbers with an equation. What happens if one was able to find one...

Hello, This may seem like a random question but I'm doing a essay on cryptography and I'm wondering if anyone could tell me who was the mathematician(s) that done the original work in prime numbers that lead to the development of cryptography and the RSA and whatnot. Sorry if this is vague...

Hello, this is rather vague but I had a lecture around a year ago about prime numbers and how a mathematician (Hardy or Euler?) found a proof to do with prime numbers and then this lead on to cryptography and internet security... That's all I can particularly remember but I'm wondering on...

Dears, Hope everything is going fine with all of you; I hold a Bsc in communications and electronics engineering and a Diploma in Information security; I want to study cryptography, and I decided to have a Msc in Maths for this reason; Kindly, if you can recommend what books to read...

As per the title, I need a cryptography book that does not shy away from math. To me it seems like many crypto books are scared of presenting the theory from a mathematician's perspective. I was recommended Cryptography : Theory and Practice by Stinson, can anyone comment on it? Any help is...

If any of you guys are seeing or saw this app. for linear algebra in your classes, I could use a hand... Homework Statement A Hill 2-cipher is intercepted that starts with the pairs SL HK Find the deciphering and enciphering matrices, given that the plaintext is known to start with the...

Hello! I'm an undergraduate in physics engineering student who's thinking about his future. I would like to work in the field of quantum cryptography or communication with light, or -more or less- to do the same kind of research as Anton Zeilinger. Which kind of MSc and PhD should I take and...

So I'm getting to the point now where I need to start looking at graduate schools in mathematics. Being a pure math major my original plan has always been to get a phd in pure math and from there attempt to break into academia. But the more I learn about the current academic climate, the more...

Suppose m = 6 was encoded with ther permutation \pi = (13)(2546) Decrypt:- EESLSHSALSESLSHBLEHSYEETHRAEOS It turns out that the inverse of \pi is how you decrypt the message and apply the inverse permutaion which is (31)(6452) And the plaintext is she sells seashells... However I am...

Finding log3(4) in Z(11).. Is that the same as finding log3(4)(mod11)?

Hello Every one! I am an electric engineering student, Doing my graduation project on the topic of quantum cryptography, i have read the literature and i think that i understand the topic quite well. In the literature review i am talking about classical cryptography, QKD, BB84 protocol, EPR...

What classes do I need to major in Cryptography?

If I want to go into quantum cryptography, what classes should I take and what colleges are there that offer this degree? Thank you so much!

Homework Statement 7) You are attempting to break an affine cipher. You believe that the ciphertext ‘a’ maps to the plaintext letter ‘E’ and that the ciphertext ‘v’ maps to the plaintext ‘T’. Determine the encryption function used based on these two pieces of information. Homework Equations...

Simple, ingenious, and effective. http://www.nature.com/news/2010/100829/full/news.2010.436.html http://www.youtube.com/watch?v=VMdf8Xwxvnw&p=5E45CC761E979839&index=2&playnext=2

So here is my situation: I am planning on graduating March 2011 with a B.S in Mathematics, as well as a B.S. in Physics. My interest in physics has waned greatly, and my desire to go to grad school for either subject is non-existent right now. I took a look at the NSA, as I heard they hire...

I'm having some trouble addressing the following two questions in a text I am going through: 1. Show that n is a prime number iff whenever a,b ∈ Zn with ab=0, we must have that a=0 or b=0. 2. Show that n is a prime number iff for every a,b,c ∈ Zn satisfying a not =0, and ab=ac, we have...

What undergraduate degree will best prepare a person for one of these fields (comp security/cryptography)? - math - compsci ...out of the two, which one would better benefit me if I pursue a PhD with. I'm most interested in computer security and cryptography. Cryptography is...

I'm reading up on quantum key distribution schemes, mostly: BB84, B92 and the EPR Protocol, and I'm having some problems relating them. Is it correct to say that BB84 is a special case of B92(with extra specific states)? Is it also safe to say that both BB84 and B92 are special cases of EPR...

Hi, Can anyone recommend some good websites, or preferably books, which give an introduction to Quantum Cryptography? I'm looking for a level aimed at first year undergrad level, assuming little to no prior knowledge really, except for A-level quantum physics. Any suggestions would be very...

I was wondering, what types of programming languages are used in the field of Cryptography? I'm a math major with a working knowledge of C/C++, Java, and Python. Would it be worthwhile to learn some assembly languages? Should I learn more high level languages? Or, should I hone my skills in the...

I am extremely skeptical about quantum cryptography. First all of the articles I have read about the technology use the same mathematical concepts to encrypt and decrypt a message. Nothing about quantum cryptography actually changes physical characteristics of math. That is obvious. There...