Today everywhere around us we have digital data, which are easy to use and often leads to their misuse. In this paper we will pay attention on protecting audio files. With using of block cipher we will encrypt audio data to prevent any kind of their abuse. We will use family of block cipher named SQBC (Small Quasigroup Block Cipher) based on quasigroups of order 4 and their transformation. Actually we will present encrypting of different types of audio files with different parameters. We will examine influence of different block size, round number, different type of quasigroups and encryption mode. Our goal is to present which of this parameters are important for encrypting audio files and should be chosen carefully.
audio files, encryption, quasigroups, block chipper, SQBC, block size, round number, encryption mode