RSA is a common public key algorithm, which can be used for encryption and signature. It is a core component of most the security protocols used on the Internet, including the SSL/TLS protocol suite.
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Is there any particular reason to use Diffie-Hellman over RSA for key exchange?
I often see RSA being recommended as a method of key exchange. However, the Diffie-Hellman key exchange method appears to be secure as well.
Is there any considerations one should take into account ...
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2answers
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Why is RSA using fixed point type numbers?
Why does RSA use fixed-point numbers instead of floating-point? Are there too many floating-point implementations to choose from? Does fixed-point arithmetic increase the difficulty of factorization? ...
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RSA Possible Vulnerability?
Given c1 = cipher text of m encrypted with n1 and e
Given c2 = cipher text of the same m encrypted with n2 and the same e,
Is it possible to figure out either of the n's or m?
I can't seem to solve ...
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3answers
226 views
Lessen impact of DoS attack on cpu-expensive login?
This is a follow-up to my previous question: Prevent DOS against RSA authentication. This question is also discusses a similar problem: Prevent denial of service attacks against slow hashing ...
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2answers
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Web & insecure HTTP - Using RSA for encrypting passwords on the client side
I used client side password hashing in my register and login project.
Its purpose is to prevent passive adversaries/eavesdroppers from discovering users' plaintext passwords when HTTP requests are in ...
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2answers
90 views
Prevent DOS against RSA authentication
In my current setup, the clients are bundled with the server's public key. The client encrypts a nonce and sends it to the server which uses its own nonce and the nonce received from the client to set ...
2
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1answer
122 views
How large RSA-keys could the worlds combined computer power factorize in reasonable time?
If you combined every microprocessor on earth into one humongous computational cluster, how large RSA-keys could you factor in reasonable time (lets say a few years)?
I know from reading the answers ...
2
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2answers
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Was DSA invented from RSA?
I'm wondering if the two algorithms are similar and whether DSA was really just based off RSA?
Is DSA based on RSA and public key encryption?
If so how does DSA introduce signing and makes it ...
2
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1answer
52 views
Does ciphersuite ECDH / ECDHE need hardware acceleration
I have started to read more about ECDH/ECDHE and am wondering if it has the similary issues as RSA - i.e. the processing power required for the decryption of private key is more than of the public ...
2
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4answers
293 views
RSA maximum bytes to encrypt, comparison to AES in terms of security?
What is the maximum number of bytes for encrypting a plaintext message using RSA that is reasonably secure and also efficient and would AES be better for the same size in bytes? The encryption doesn't ...
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2answers
215 views
Questions to hybrid encryption. RSA with AES
I want to use a hybrid encryption in my application, so after reading a lot of lines I ended with this implemantation, please critizie it ;) (I want to stick to .Net)
byte[] aesKey = ...
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1answer
113 views
zero knowledge proof - where do we use it?
zero knowledge proof, where do we use it online? I thought we mostly use the RSA algorithm.
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1answer
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generating RSA keys through the browser
HTML5 has the element that sends an SPKAC to the server (as I understand it).
But how do you do it in IE?
One CA's websites gives me the following prompt:
This Web site is attempting to perform a ...
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1answer
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Where is RSA Digital signature used in the online banking world?
When i do online banking, i sign my digital transaction with a digipass. Ive been told that it uses a RSA-based digital signature scheme. But an rsa digital signature (1024 bit for the modulus) is a ...
4
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1answer
150 views
Why is ECC more vulnerable than RSA in a post-quantum world?
Forgive me if this should be in the crypto sub, but sometimes the answers there are very mathematical and I would rather have an answer which is a bit lighter on the math but still strong on the tech ...
