Documentation on Cryptographic Parameters #232
Description
Some details of the cryptographic defaults used in the main library used to encrypt the election should be available for transparency and clarity.
The following parameters should have a link to where there are defined for easy checks:
The parameter p used to compute the modular arithmetic operations must be a prime number whose discrete logarithm is not solvable in an assumable time in 
. This means that p -1 must have a large prime factor which makes the discrete logarithm problem difficult.
The size of this parameter p must be of 4096 bits
The parameter q must be a prime number which divides -1` and its length is 256 bits.
The parameter r must be computed as r=(p -1)/q
The parameter g must be a generator in 
. This means that, in , g can be expressed as a combination (under the group operation) of finitely many elements of the subset and their inverses.
The messages sent from Decidim server and to the BulletinBoard are signed using 4096-bit RSA keys and SHA-256 hashes.
Finally, since the system uses external libraries, links to the bug-reporting pages of those libraries should be available through the documentation.