http://7fa6xlti73nrpxl6cykao4wp7g3bg4624ghrtdomlvkeivvwclv2iyad.onion/anonbib/cache/chaum-mix.html
With a cascade of mixes, the message part is prepared the same as for
a single mix, and the address part is as showin in the following
input:
K1( R1, K2( R2, ..., K<n-1>( R<n-1>, Kn( Rn, Ax ))...)), Kx( R0, M ) -->.
The result of the first mix is
K2( R2, ..., K<n-1>( R<n-1>, Kn( Rn, Ax ))...), R1( Kx( R0, M )) -->,
and the final result of the remaining n-1 mixes is
Ax, Rn( R<n-1> ...
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