The terminology tag has no wiki summary.
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What is a fair exchange scheme?
The Wikipedia entry Fair exchange has only two lines, and the only paper I can find describing such a protocol is extremely complicated.
Is this a new field in cryptology or can someone give an ...
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1answer
73 views
What are unified addition and differential addition in elliptic curve point arithmetic?
A lot of papers use these terms but I do not find a proper explanation of them. Can somebody tell the meaning / difference / intuition / application and if possible with an example.
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1answer
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Why is Diffie-Hellman considered in the context of public key cryptography?
In all textbooks I used the Diffie-Hellman key exchange is under "public key cryptography".
As far as I can see it is a method to exchange a key to be used with a symmetric cryptographic algorithm, ...
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2answers
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Name for identical operations for encryption and decryption
Is there a name for the property of a cryptographic algorithm that the operations for encryption and decryption are identical, i.e.
$E_k(x) = D_k(x)$ and accordingly $E_k(E_k(x)) = x$?
An example ...
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1answer
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What are rounds in the context of ciphers?
Another recent question on security margin included in its answer the discussion of how many rounds are broken so far. What is the definition of a round?
4
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1answer
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What is 'security margin'?
I have been academic papers about Rijndael, Serpent, and Twofish, and there is this term that is vague to me. I cannot find a tangible definition in google. Can someone briefly define, describe, ...
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1answer
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What does a “cycle” mean in cryptography benchmarks?
In this table, for example, cryptographic algorithm performance is measured in cycles per byte for symmetric ciphers, and in cycles per operation for asymmetric ciphers.
What does "cycle" here mean, ...
2
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1answer
126 views
What is “Blinding” used for in cryptography?
What does "blinding" mean in cryptography, and where do we usually use it? Can you describe a sample implementation?
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3answers
96 views
The meaning of “scheme”
This question is a bit different from other questions here, but I think it is suitable to correctly understand the terminology of cryptography.
Consider the following two sets of terms:
Encryption ...
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1answer
208 views
Simulation-based security?
I've been reading Introduction to Modern Cryptography by Katz and Lindell as an introduction to cryptography. The book seems to use the term 'simulator' when it talks about a game like, for instance, ...
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2answers
263 views
Toy cipher — does it have a name?
When I was perhaps nine years, I borrowed a book from the library on various maths and CS topics. It outlined various simple ciphers, including one that I used a lot, just for fun. I can't remember ...
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0answers
101 views
Security of stream cipher based on Matrix multiplication GF(256) with randomized padding
The actual question is stated at the end of the text. Suppose you have a (grossly inefficient) confidentiality stream cipher with the following components:
The keyed function ...
6
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1answer
280 views
Are there any authoritative definitions of “key stretching”?
This is mostly a terminology question, but I suppose that it is best asked and answered here. After browsing the Internet I have come across a fair number of completely different definitions of the ...
