On AES standard implementation for corporate networks

In this article corporate information protection by data encryption is considered. For plaintext encryption the usage of Rijndael algorithm is proposed. The algorithm operates on sequences of blocks called “states”. Encryption involves four transformation stages named as follows: SubByte, ShiftRows, MixColumns and AddRoundKey. In the article an example of AES encryption of a typical plaintext representing a corporate mail is shown. It is confirmed that ciphertext length (160 bytes) is almost the same as plaintext length (159 bytes), which corresponds to the requirements. Field test results show the advantages of the proposed encryption method for telecommunication systems with limited computational capabilities.