Analysing of some code based post quantum encryption algorithms and key encapsulation mechanisms

In this thesis, some code based key encapsulation mechanisms and encryption algorithms are analysed. In these algorithms, especially McEliece encryption system is based and their post quantum security is tried to be ensure with some improvements. In this sense, McEliece encryption system is mentioned at first. Then, properties of LRPC and Goppa Code families that are used in mentioned algorithms are included. Key generation, encryption and decryption steps of these algoritms are explained in details. Subsequently, whole process of these systems are demonstrated with examples. Finally, parameter sets of these three algorithms are compared.