Is it possible to invent a code which cannot be cracked?

Question

Is it possible to invent a code which cannot be cracked?

Answer 1

It depends on what you mean...if you mean encryption (which the term cracked would imply) then you could mean a few things.



Cracked though brueforce in a decent (meaning beyond the normal lifespan of a human) time...yes this has already existed for some time. From what I understand AES is the way to go.



Cracked though some backdoor...well...when I was in discrete math and covering RSA encyption, he told us that if any of us ever came up with a new "better" algorithm for ciphering data than what is out there...if we sell it in the US then we would have to share a backdoor with the US government. I do not know for sure if this is true, but I have heard the same thing from more than a few people.



Now...about the brueforce method...have you ever heard of the knapsack problem? Well the more information you have, the less combinations you need to try. From my experience with RSA encryption (and reading about some of the more "modern" ones that involve math way beyond what I was taught...and keep in mind I've taken ALL the lower division math classes...) encryption methods tend to work off of the concept of prime numbers...more specifically INTEGERS that are prime numbers.



Right now they say that an MD5 hash could never be cracked...but considering that we are now in the age of MULTI-CORE systems that can also run MULTIPLE THREADS at one time...and can apply older concepts of clustering comptuers together to create a cheap supercomputer...well...lets just say it's pretty safe to assume that nothing can ever be totally "crack" proof.



Oh and kudos for using the right word.

Answer 2

You mean not EVER cracked, in a moderate time cracked, or just everyday cracked?



I use TrueCrypt (free but extremely powerful) for storing all my sensitive data.



http://www.truecrypt.org/downloads



(Click the 'Download' button at the top of the list, where it says "Windows 7/Vista/XP/2000, TrueCrypt Setup 7.1a.exe (3.3 MB)"



There is no 'backdoor' to it where law enforcement or anbody else has a special 'master' key, because the programming code for it is publicly available and can be reviewed by anybody at all to see if there are provisions for it to be opened by 'special people')



So yes, they've 'invented a code' that could be considered 'unable to crack'.



Having said that, I'm not positive whether you mean security software that can't be cracked or some type of 'password' that can't be cracked.



if you mean a very strong password, just use the usual method:

Avoid using a password with one word that can be found in a dictionary (or even a combination of 2, 3, or 4 or more words).

It should not contain any names or dates of birth. It should not be a password that is easy to guess, obviously.

A very stong password consists of a random COMBINATION of upper and lower case letters, numbers, and special characters, such as @ ^ = $ * + % #, etc.

An extremely strong password will consist of at least 20 such characters.

Some 'logins' will only acept certain characters such as 'Must begin with a letter, contain a number, no special characters, and no more than 8 characters long'

In a case like this, keep the above tips in mind and make it as strong as you can within the limitations.



An example, which is not as strong as it could be due to the repetition of the same charcter may be

Say you want to use a password that is easy for you to remember, such as 'comeback', you could use

'k0m3dAkc'

(Using k instead of c for 'kh' sound, zero rather than letter o, 3, which looks like a backward E, d which looks like a backward b, capital A instead of lowercase a, transpose the last 2 letters from ck to kc)





.

Answer 3

One way cyphers are typically harder to crack. Whereas encryption functions are designed to be decrypted. SHA-3 (Keccak) is the latest in the SHA family and would be extremely hard to crack (one way cypher). These can't be decrypted as such, the only way is through collisions, where you match data with the output from the encryption algorithm. Code will always be crackable, is just a question of if the correct path is found (e.g. through reverse engineering, collisions, flaws etc).



In regards to the other comments, True Crypt volumes have been cracked. And MD5 has been cracked since 1996.

Answer 4

hi 1989:) I even have examine the article and it somewhat is exciting. i don't experience qualified to choose that is fee one way or the different yet i'm basically a tad uneasy approximately that is (obvious) implication that Jerusalem might desire to be by some potential greater substantial than different web content interior the secret of the universe. I mean, what approximately Stonehenge or my widespread spot interior the woods? in line with possibility I examine too plenty into the article and that is purely my knee jerk reaction with reference to the "chosen human beings" stereotype? might desire to be. MY undesirable, if so. I do experience that some places seem by some potential "distinctive" than others for motives that are no longer sparkling and that that is ideal to maintain an open recommendations. i might additionally elect to show out to those who look to experience that Sir Isaac Newton could be by some potential "above" such an theory that he grow to be regular to be very interested in Alchemy, something that could desire to be seen a pseudo-technological information immediately. For all of us who ever appeared on the seen gentle spectrum and had a tough time finding indigo....don't experience undesirable. It does not exist. beneficial, there's a hue we call indigo in spite of the shown fact that that is basically a colour of blue human beings. Newton caught it in with the aid of fact the extensive type 7 had great magnitude interior the "magic" of alchemy. So, I nonetheless can no longer remark on the validity of the article with the aid of my lack of expertise yet i does no longer low fee it completely and that i will certainly have faith it of Newton (who for sure grow to be a amazing guy) so I take it heavily and think of it merits extra theory.

Answer 5

Coding is very complex. And no matter how secure you make something, there's always a loophole. I wouldn't say its fully impossible, but I feel like writing a perfect code would be like writing perfect song because there really isnt a way of defining it.

Answer 6

sure I just read about some WWII encrypted messages that cannot be cracked, the Japanese were unable to crack the Navajo code in WWII



http://www.alertboot.com/blog/blogs/endpoint_security/archive/2012/11/23/old-encryption-is-still-worth-its-mettle-wwii-pigeon-code-goes-unbroken.aspx