Further Heuristic Discussion on Two Countermeasures against Reaction Attacks on McEliece Cryptosystems with QCLDPC Codes

Recently two countermeasures against reaction Attacks on McEliece cryptosystems with QC-LDPC and QC-MDPC codes were proposed. In this paper further heuristic discussion and elements of the protocol proposals are presented which can bring a system with these techniques closer to practical applications and also can enhance the overall security of the systems which will use them.