IND-CCA2 secure McEliece-type modification in the standard model

The main goal of this work is to construct a McEliece-type cryptosystem with IND-CCA2 property in the standard model and an effective data transfer rate. The proposed modification is based on the application of the $s$-repetition method and uses one common secret permutation. The modification uses the transmission of $s$ encrypted blocks for $s/2$ information messages, that makes this modification more effective than most other modifications based on the $s$-repetition method. The paper also provides additional cryptosystems with the semantic security.