The AES-GCM128 IP core from Alma Technologies implements the GCM-AES authenticated encryption and decryption, as specified in the NIST SP800-38D recommendation for GCM and GMAC and the FIPS-197 Advanced Encryption Standard. The core can be programmed to encrypt or decrypt 128-bit blocks of data, using 128-, 192-, or 256-bit cipher-key. In addition, using the GHASH algorithm a Hash value - the TAG - is calculated for the encrypted, or the additional plaintext, data. Then, in decryption mode, the calculated TAG is compared with the TAG that accompanies the ciphertext data and a Fail or Pass flag is accordingly generated.

The AES-GCM128 core uses 128-bit datapath, needing 1 clock cycle to load or unload each 128-bit plaintext or ciphertext data block. A Key Expander module is included in the AES-GCM128 and automatically generates the AES Round Key Values. All internal operations are performed on 128-bit words and, for each HASH, only 12/14/16 clock cycles are required per 128-bit block for 128/192/256-bit cipher-key size respectively. The AES-GCM128 core supports 96-bit Initialization Vectors and input/output TAGs of configurable length.

The AES-GCM128 core is equipped with easy-to-use fully stallable interfaces for both input and output. These are designed to permit the user application to pause the produced output data stream when it is not able to receive data, or to pause the input stream towards the core according to data arrival rate.

IP Deliverables

Clear-text RTL sources for ASIC designs, or pre-synthesized and verified Netlist for FPGA and SoC devices

Release Notes, Design Specification and Integration Manual documents

Bit Accurate Model (BAM) and test vector generation binaries, including sample scripts

Pre-compiled RTL simulation model and gate-level simulation netlist for the FPGA Netlist license

Self-checking testbench environment sources, including sample BAM generated test cases

Simulation and sample Synthesis (for ASICs) or Place & Route (for FPGAs) scripts

Symbol

Features

Compliant, High-Performance and Standalone Operation

Advanced Encryption Standard (AES - FIPS PUB 197) and NIST SP800-38D for GCM/GMAC compliance

Run-time programmable encryption or decryption operation

Run-time programmable cipher-key size: 128-, 192-, 256-bit

Integrated Key Expansion module for automatic generation of the AES Round Key values

96-bit GCM Initialization Vector

GMAC operation supported: Additional Authenticated Data input, without encryption

Comparison between the input TAG and the generated TAG during decryption

12/14/16 clock cycles per 128-bit block for 128/192/256-bit cipher-key size respectively

12 clock cycles per HASH operation

High-speed, flow controllable, streaming I/O data interfaces

Trouble-Free Technology Map and Implementation

Fully portable, self-contained RTL source code

Strictly positive edge triggered design

D-type only Flip-Flops

Fully synchronous operation

No special timing constraints required

No false paths

No multi-cycle paths

Literature

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AES-GCM128 IP CORE LICENSING OPTIONS

AES-GCM128 IP CORE LICENSING OPTIONS

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