Questions tagged [quantum-computing]
refers to hardware and software of quantum computers, and what their capabilities will be. For protecting your data against a quantum attacker, see [post-quantum].
27
questions
94
votes
4
answers
22k
views
Will quantum computers render AES obsolete?
This is a spin off from: Use multiple computers for faster brute force
Here's at least one source which says that quantum computers are on the way to being able to break RSA in the not too distant ...
- 1,003
37
votes
2
answers
32k
views
How many qubits are needed to factor 2048-bit RSA keys on a quantum computer?
I've been reading about quantum computing and turns out that 512-bit quantum processors are already a thing. I also read about Shor's algorithm, which can break RSA and several asymmetric encryption ...
- 1,204
36
votes
2
answers
8k
views
When could 256 bit encryption be brute forced?
Assuming quantum computing continues to improve and continues to perform like this:
... quantum computer completes 2.5-billion-year task in minutes
is it reasonable to expect that 256 bit encryption ...
- 1,250
8
votes
2
answers
2k
views
What SSH keys should I generate with ssh-keygen to be safe in a quantum computer based world?
What SSH keys should I generate with ssh-keygen to be safe in a quantum computer based world?
- 141
5
votes
2
answers
415
views
How safe is this "Multidimensional-Encryption method" (includes xAES, familiar from Unseen.is)?
I would like to ask about this encryption
method that I found: USPTO patent and it is related to this question here: A service that claims beyond army level encryption and Unseen.is encryption claims ...
- 53
4
votes
2
answers
642
views
Quantum Computer Advantage in SSH Login
I understand that quantum computers are many orders of magnitude faster than today's binary computer and that this is expected to enable decryption that was unlikely (it would take too long) with ...
- 1,541
4
votes
1
answer
555
views
What happens to PKI once quantum computers can break encryption?
They say that public key infrastructure or PKI uses very complex encryption. What if that encryption breaks one day when quantum computers complete? What if they decrypt all private messages and data? ...
- 151
3
votes
3
answers
3k
views
What is a quantum computing attack?
As far as i know, a quantum attack is a brute force attack performed by a quantum computer. source: wiki
Is this very simple definition correct ? or the scope of a quantum computing attack is bigger....
- 1,663
2
votes
1
answer
185
views
What can you do with a sufficiently complex quantum computer against Elliptic Curve Cryptography?
I've heard that a modified version of Shor's algorithm can "break" ECC. But what does this mean specifically? What are all the things you can do with this algorithm? Can you:
decrypt messages ...
- 207
2
votes
1
answer
543
views
Can I render public-key cryptography quantum resistant if I treat even the public keys as secret?
Here is the situation - RSA/ECC is not quantum resistant, because a quantum computer feasibly calculate the private key based on the knowledge of the public key (because the quantum computers tackle ...
- 71
1
vote
3
answers
1k
views
Why are we using RSA although it will be cracked by quantum computers?
Why do we still use RSA 2048 when we know that quantum computers can crack RSA as fast as classical computers can create the key?
Providers, governments, APTs, etc. can sniff all the traffic and as ...
- 27
1
vote
1
answer
123
views
Will the public-key cryptosystem change in a post-quantum state?
I would like to preface this with the information that I am clearly not well versed in crypto, so my understand so far may not be accurate.
CISA recently published an advisory Preparing Critical ...
- 1,744
1
vote
1
answer
2k
views
Password cracking using Quantum Computers
Suppose that I have a password that is n-digits long. Each digit can take m values. So the number of permutations will be m^n. I wanted to know how much time it would take a quantum computer to crack ...
- 121
1
vote
1
answer
127
views
Size of a secure random number taking into account quantum computing and size of universe
Most random secure numbers are 256 to 512 bits. But given the size of the universe and eventually quantum computing, I am wondering what is a better sized randomly generated number, taking into ...
- 618
1
vote
2
answers
915
views
Quantum-secure alternatives in SSL
Are there any quantum computing-secure open key exchange algorithms already implemented in SSL/TLS which I could use on my web server? As far as I know all the available-options like RSA, DH, elliptic ...
- 11
1
vote
2
answers
765
views
Will quantum computing destroy all our present encryption? [duplicate]
I'm just wondering, because it seems like it would. Cryptography as a field may have to start all over from the beginning.
- 121
1
vote
1
answer
411
views
Calculating D-Wave's integer factorization capabilties
D-Wave has teased the ability to perform integer factorization previously, but if you jump to ~10:00 in this presentation they actually appear to outline how they can perform integer factorization ...
- 862
1
vote
1
answer
356
views
Proof of quantum safety of the Merkle signature scheme
The Wikipedia article about the Merkle signature scheme claims that it is
very adjustable and resistant against quantum computing.
What proof is there of this?
- 23
1
vote
0
answers
44
views
Monitoring QKD system with EDR Wazuh
I’m trying to do my thesis project about the possibility to prevent attacks against QKD devices, using an EDR like Wazuh. The problem is that most attacks are prevented through physical methods ...
- 15
1
vote
0
answers
656
views
How long until quantum computers are able to decrypt RSA using Shor's algorithm? [closed]
Based on this question:
How many qubits are needed to factor 2048-bit RSA keys on a quantum computer?
It's going to take 20-30 years for quantum computers to reach that state but some people are ...
- 507
0
votes
1
answer
266
views
Could Quantum Computers Quickly Crack Ransomware Encryption?
I've heard that quantum computers may soon be powerful enough to crack standard encryption. If this is true, could we potentially harness them to end ransomware? Instead of paying the ransom or coming ...
- 246
0
votes
2
answers
829
views
How can we estimate the time and computing resources needed to break or crack an encryption algorithm and/or password?
I am not too familiar with the technical jargon, so bear with me while I explain the issue in simple and naive words. I have looked into many places but still haven't found a solution to this specific ...
- 229
0
votes
0
answers
22
views
How likely is it that publicly available data will be decrypted in the future? [duplicate]
As we already know, with the rising power of machines and new technologies like quantum computers today's methods of encryption might be much faster to crack in the future.
With locally saved data you ...
-1
votes
1
answer
137
views
Doesn't Hashing Negate Quantum Computer Cracking?
I've read/watched a lot about Quantum Computers, trying to really get into the physics of it. Seems like the topic is poorly explained. I do understand that it takes a lot of qbits to beat modern ...
- 101
-1
votes
1
answer
317
views
Fuzzing with a Quantum computer? [closed]
Are there any projects, solutions, ideas where it is possible to fuzz a software:
https://en.wikipedia.org/wiki/Fuzzing
using quantum computers, quantum programming?
https://en.wikipedia.org/wiki/...
- 141
-2
votes
3
answers
2k
views
Will Quantum computing render passwords obsolete? [duplicate]
With so much raw computing power under hood, we are talking minutes to break even 50 characters passwords with bruteforce attacks in few decades. And two way authentication will probably be a lot ...
- 97
-3
votes
1
answer
273
views
For which time-frame should we assume quantum computers? [closed]
It is generally known that we choose our key-lengths, so they are unbreakable in a specific time frame. For example we choose 112 bit keys (=2048-bit RSA) to protect data for the next few years and we ...
- 9,720