How long does it take to crack encryption?
Jan 28, · As shown above, even with a supercomputer, it would take 1 billion billion years to crack the bit AES key using brute force attack. This is more than the age of . May 19, · A million is 20 doublings, so an bit key will take a million years. Your bit key is still 19 bits longer, which multiplies the time by , So to crack a bit key with modern Author: Lance Gutteridge.
Information Security Stack Exchange is a question and answer site for information security professionals. It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. I read that bit encryption takes millions of years to break. But hoq I encrypt a file using say winzip that uses bit encryption but the password I use is only one character long for example the character "A" why would it take you millions of years to break in and decrypt my file?
Or does bit encryption mean if my password is bits long, then it would take you millions of years to break? It tells nothing about the password length or contents. To break such a file, two possible paths: try all possible passwords until the right one is found, or try all possible secret keys until the right one is found. On the other hand, there are much fewer potential passwords because passwords are chosen by humans with human brains, and human brains are not good at making random choices; also, humans are lazy and will prefer short passwords easier to remember, easier to type ibt.
Trying all "potential" passwords, i. Any decent password cracking software will first try all possible very short passwords i. A one-letter password would be cracked within a fraction of a second.
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Why so long to break bit encryption? Ask Question. Asked 8 years, 1 month ago. Active 6 years, 2 months ago. Viewed 34k times. Improve this question. Newbie Newbie 1 1 gold badge 1 1 silver badge 3 3 bronze badges. Add a comment. Active Oldest Votes. When encrypted data using a password, things go that way: The password is converted into a secret tl using a Key Derivation Function. The key is used to encrypt the data with a symmetric encryption algorithm "symmetric" means that the same key will be used for decryption.
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The estimation for half the known key would therefore be seconds. But to brute force a bit key, we get this estimate: Let's assume we can test as many keys as the current hashrate of the bitcoin network. There special purpose hardware is used and it's for SHA, this makes it not directly usable, but it should be close. There are 2 = possible keys of bits; that's a lot and trying all of them will take millions of years. On the other hand, there are much fewer potential passwords because passwords are chosen by humans with human brains, and human brains are not good at making random choices; also, humans are lazy and will prefer short passwords (easier to . Jul 13, · Passwords and the encryption standard ( bit in this case) have nothing to do with each other. The encryption is done exactly the same way whether you have a 3 character password or a character password. Hacking an encryption means bypassing the password completely.
Cryptography Stack Exchange is a question and answer site for software developers, mathematicians and others interested in cryptography. It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. How long would it take to crack a AES key using the most advanced technology currently available?
I wrote a similar answer in the past, where the assumption was half the key is known. Since then, the bitcoin hashrate almost tripled it's used in the estimation, as below. Let's assume we can test as many keys as the current hashrate of the bitcoin network. There special purpose hardware is used and it's for SHA, this makes it not directly usable, but it should be close. Regarding the type of hardware: For some years now bitcoins are mined mostly with ASICs, which are faster and more efficient than all of those options you listed.
That's special purpose hardware, which can't be programmed to do anything else - but it's the best we can do for speed. This is approximately:. Related question: How much would it cost in U.
That is ,, block encryptions per watt per second. Imagine we can do times better over time, say in the next years should be easy with lots of money. Now imagine we extract TW of solar energy by covering the planet in solar panels landmass not required for plant growth , and under those panels are our AES processors. We will hit the limits of lithography, but I would assume we can improve our compute performance another times in that time period, and maybe improve solar efficiency by double, so lets say years.
If we really decide to cover all land mass with solar panels to do the job, we can get maybe 4X more power, and get it done in 40 years BUT it will take much longer than that for process tech and buildout of the panels, and the infrastructure to get it all working, so I would still say at least a few centuries, probably under years.
I didn't understand the most answers here. I my view, exascale computing will be able, to easily crack bit keys in near future. That masterkey is always used to encrypt the data, and is also encrypted by the user password. So only bit keys with 32 byte are secure enough, to protect our data for the next decades.
An or bit cipher would be even better, to have no problems for the next xxx hundred years. I didn't like that "secure enough for xx years". Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. How long would it take to brute force an AES key? Ask Question.
Asked 3 years, 10 months ago. Active 1 year, 8 months ago. Viewed 51k times. Improve this question. Joy Joy 1 1 gold badge 1 1 silver badge 4 4 bronze badges. Add a comment. Active Oldest Votes. Improve this answer. It is physically impossible to go beyond certain thresholds, e. It is just the largest publicly known system for paralllel computation and it's thematically similar - large computing centers are often optimized for floating point operations.
But the bitcoin network is still growing - we can't estimate how it develops over this period of time. And finally: We could also consider the estimated timespan until our sun expands to a red giant and burns earth in the process. Assuming that, the answer is: It's not finished befoe that point in time. Could you provide an update on how much of a dint this has made compared to ?
Richie Frame Richie Frame 12k 1 1 gold badge 20 20 silver badges 37 37 bronze badges. Rukako Rukako 1 1 silver badge 8 8 bronze badges. Nick Nick 1 1 1 bronze badge. Each byte can take on one of values, not just Contrary to my statement, a byte string does not correspond to a digit string.
And since 16 bytes are represented cryptographically in hex format, this results in a good digit string, which corresponds to a safety margin of bits. That would be far beyond what can be calculated within a reasonable time.
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