New answers tagged algorithm-design
1
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Can Ed25519 signature be used as a base for ChaCha20 secret key?
So, the OP's goal here with the construction in the question is to do the following:
Prevent anyone from creating a valid container without being a writer(ie possesing the writer's secrets).*
Allow ...
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8
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Is it possible to add arbitrary amounts of quantum resistance cheaply?
No, for the reasons indicated in the other answer to this question.
But I want to point out a partial stopgap measure when it comes to signature: using Schnorr groups with large parameter $p$ (e.g. ...
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5
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Is it possible to add arbitrary amounts of quantum resistance cheaply?
There is no way to do this.
Under Shor's attack the Discrete Logarithm in a group of size $2^n$ has quantum complexity $\mathrm{poly}(n).$
If we consider extending the bitlength by $n^c$ bits as $O(n^...
- 23.7k
2
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Do the specific powers of two $2^{23}$ and $2^{13}$ in the modulus $q = 2^{23} - 2^{13} + 1 = 8380417$ have any special purpose in its design?
Here's a few important factors for choosing the modulus:
SIS gets easy if the modulus is too big or too small. If it's too big, the corresponding lattice problems get easier. If it's too small, ...
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-2
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What is the difference in exchanging the Enigma rotors in their slots?
I totally agree. Exchanging order of rotors DOES NOT increase the total keys. STILL it is 26 × 26 × 26 keys no matter what order of rotors is.
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