These high performance cores have been designed to provide hardware acceleration of the underlying 802.11 WPA security algorithms, which in combination with the Helion AES-CCM core family, may be used to implement a full 802.11i WPA2 security solution very efficiently in Xilinx FPGA. The security processing is split into two parts, since they are likely to be required at different points within the MAC subsystem.
The Helion WEP/TKIP Encryption engine is a standalone high-speed processing core which is designed to encrypt and decrypt 802.11 MPDU data, based on an underlying ARC4 stream cipher. It includes all the defined keymix processing as well as the MPDU payload encryption/decryption functionality.
The Helion TKIP Michael engine is a standalone high-speed processing core which is designed to accept 802.11 MSDU data and use it to generate a compliant “Michael” authentication tag. The Michael tag is typically appended to an outgoing MSDU for encryption, or compared with a decrypted incoming tag for authentication checking
