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Oct
30
comment Public key encryption without ciphertext expansion
It is strictly for use in a deterministic sense. By specifying VARCHAR(255), I assume that it is a deterministic permutation between 0 .. 2^(8*255).
Oct
30
comment Public key encryption without ciphertext expansion
@DrLecter Several reasons I would need it. The app is running on cloud and stores the data on cloud. The app only writes the data but does not need to read it. Then I would like to use public key encryption to protect it from the cloud provider.
Oct
30
asked Public key encryption without ciphertext expansion
Jul
12
awarded  Yearling
Jun
3
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Dec
20
revised Diffie-Hellman insecure on addition modulo $n$
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Dec
20
revised Diffie-Hellman insecure on addition modulo $n$
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Dec
20
answered Diffie-Hellman insecure on addition modulo $n$
Aug
24
awarded  Nice Answer
Jul
12
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May
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awarded  Popular Question
Jan
10
comment How secure is the knapsack?
I am using the special properties of the knapsack (the sum). It is actually meant to be used in another protocol. In my case $X$ (the target sum) is defined by the user. We are free to choose $W$. However, as a first solution, I will be happy even if both $(W, X)$ are freely chosen, as this might be extended even when $X$ is fixed.
Jan
10
revised How secure is the knapsack?
edited body
Jan
10
revised How secure is the knapsack?
added 318 characters in body
Jan
10
comment How secure is the knapsack?
@Ilmari Karonen: Not really, but good point. In my use-case, we don't need the solution, just the problem to be hard. I have updated the question with this information.
Jan
9
revised How secure is the knapsack?
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Jan
9
revised How secure is the knapsack?
added 15 characters in body
Jan
9
asked How secure is the knapsack?
Oct
18
revised Would the ability to efficiently find Discrete Logs have any impact on the security of RSA?
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Jul
12
awarded  Yearling