Linked Questions
10 questions linked to/from Why is asymmetric cryptography bad for huge data?
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Why is RSA usually limited to messages up to 1 block [duplicate]
I'm wondering why RSA encryption usually is only used for messages that fit into one block.
For larger messages hybrid encryption in combination with symmetric ciphers like AES seem to be the solution ...
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What are the practical limitations of Asymmetric encryption vs Symmetric encryption? [duplicate]
I hear it commonly said that the advantages of Symmetric encryption are speed and no limit to the amount of data that can be symmetrically encrypted.
I also hear it commonly said that the advantages ...
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Why do we use asymmetric key cryptography to then just generate a symmetric key to use? [duplicate]
I'm learning about public key cryptography (asymmetric key cryptography), but from what I've gathered, we basically use public key crypto to just move directly onto private key cryptography (symmetric ...
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Why is public-key encryption so much less efficient than secret-key encryption?
I'm currently reading Cryptography Engineering. After giving a high level explanation of the difference between secret-key encryption and public-key encryption, the book says:
So why do we bother ...
user670
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Why the symmetric key layer in PGP?
I've been familiarizing myself with the basics of PGP. If I understand correctly, PGP symmetrically encrypts the data of interest using a random single-use key, then encrypts the encrypted data and ...
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Why is hybrid encryption more effective than other encryption scheme?
Currently I am learning about Hybrid Encryption but I was not able to find any good study material.
Below is my understanding:
One of the reason why we use ...
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Why use symmetric encryption with Public Key?
A. From what I heard (and I am beginner at a security/cryptography), if you have a payload that is very large, asymmetric is a no-go.
B. Also, if you do have secret symmetric (e.g. AES) keys, you ...
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With public-key crytography, is private-key crytography still useful?
It seems that, with public-key cryptography, there is no need to use private-key cryptography. But obviously, both public-key cryptography and private-key are taught in cryptography classes. Can ...
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The purpose of digital envelopes [duplicate]
Why would you want to use a digital envelope? As I understand it, a plain-text message is encrypted using a secret key and then the key is encrypted with the receiver's public key. The encrypted ...
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Method and explanation for calculating difference in speed between DES and RSA
Our assignment asks us to convert an RSA speed in bytes per second to a DES speed in bytes per second. Our professor's treatment of this ("RSA is 100 times slower than DES") seems insufficient. Could ...
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