Cryptography Definition and 63 Threads

Hi. I am looking for a rather concise and good book on cryptography, which explains how modern encryption algorithms work and what their flaws are (eg. what's wrong with md5) Thanks

I have been reading a bit about cryptography recently, and there are a few things that I haven't understood so far: #1) I read that since compression removes redundant information, it is a randomizing function. Does that mean that I would have more high quality random data afterwards if I...

Can a secure code, for the time being, be developed from the orientations of n-poles in the CBR? For instance, a binary sequence can be constructed from the series of n-poles like those observed by COBE. The monopole would have a value 0 or 1 according to its symmetry with respect to an...

Contradict me if I'm wrong... If Black Hat blocks and controls Alice’s internet activities (a man in the middle attack) than these 2 situations can arise: 1. ALICE DOES NOT HAVE BOB'S PUBLIC KEY Alice sends Bob her public key but it is blocked by Black Hat and instead he sends his public...

I'm trying to figure out these two questions 1. I have a ciphertext message produced by RSA encryption with key (e,n)=(5,2881) and I'm trying to find the plain text message of 0504 1874 0347 0515 2088 2356 0736 0468 I found the euler-phi function to be 42*66=2772 and found the modular...

please can anyone suggest any good book for coding theory and/or cryptography (not necessarily both in the same book) thanks.

cryptography question--how to solve a Ceaser Cipher yeah, probably a very simple question i know, but we are at a loss of what to do. We haven't been given any instruction on how to solve one, but the quest we were given is The following message is a Caesar Cipher, a message encrypted by...

I was wondering about this for some time now. Considering certain applications in mathematics, particularly in cryptanalysis - how widespread is this use of cryptography? If I wanted to get into that field and had a degree in Math - how likely are foreign governments to use cryptography that...

I'm interested in doing cryptography as a major, and I've talked to a proffesor from MIT, and a student of Professor Rivest about courses to take, they included: number theory, probability, abstract algebra, and linear algebra. I am wondering if anyone has anything to add. Also for cheap...

Number theroy and Cryptography?? I heard that Number theroy has apllication in Cryptography especially the bit about factorisation.How?Can anyone Explain? Thanks in advance

I'm having some doubts about this technique... assuming Alice sends Bob 1,000 polarized photons. Our eavesdropper Eve will be able to measure 500 of them correctly, and she will also measure 250 other correctly by mistake (when using the wrong polarization to measure the photons, there's a 50%...

Quantum Cryptography is the process of encrypting information with polarised photons. This makes a theoretically and practically unbreakable code that would ensure good communication forever. You can run the photons by fibre optic cables but not in the air because the signal dissipates. The...

i know that there are 2 fundmental ways of cryptography asymeteric and symeteric is there any formulas for cryptography? i know its for a encryption system, but there must be formulas? thanks