This article presents a cryptographic hardware (HW) accelerator supporting multiple advanced encryption standard (AES)-based block cipher modes, including the more advanced cipher-based MAC (CMAC), counter with CBC-MAC (CCM), Galois counter mode (GCM), and XOR-encrypt-XOR-based tweaked-codebook mode with ciphertext stealing (XTS) modes. The proposed design implements advanced and innovative features in HW, such as AES key secure management, on-chip clock randomization, and access privilege mechanisms. The system has been tested in a RISC-V-based system-on-chip (SoC), specifically designed for this purpose, on an Ultrascale + Xilinx FPGA, analyzing resource and power consumption, together with system performances. The cryptoprocessor has been then synthesized on a 7-nm CMOS standard-cells technology; performances, complexity, and power consumption information are analyzed and compared with the state of the art. The proposed cryptoprocessor is ready to be embedded within the innovative European Processor Initiative (EPI) chip. 

VLSI Design of Advanced-Features AES Cryptoprocessor in the Framework of the European Processor Initiative

CRFlex: A Flexible and Configurable Cryptographic Hardware Accelerator for AES Block Cipher Modes

The Advanced Encryption Standard (AES) issued by the National Institute of Standards and Technology in 2001 has become the new widely-used symmetric block cipher standard. A lot of efforts have been made on the various hardware implementations of the AES algorithm. Some focus on achieving low-cost constructions, while others focus on designing high throughput. Given the specific requirement of wireless communication and portable devices, this article presents an AES IP core with an acceptable trade-off between performance and area. By introducing composite fields Sboxes and researching optimization of MixColumn can reduce resources. The AES IP is designed based on Avalon bus. It is compatible with five modes including ECB, CBC, OFB, CFB, and CTR. 128,196,256 bits key are also supported. Meanwhile, it can be flexibly configured according to the specific circumstances. This design and implementation of the AES core has a certain value for the generalization the wireless communication terminal hardware platform. Keywords-AES; configurable; SoC; Avalon

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Y.K. Song

Papers

An Implementation of Configurable and Small- Area AES IP Core Oriented Avalon Bus