Description
Achieving 40Gbit/sec throughput on minimum sized packets with minimum inter-packet separation is a challenging task, particularly for an FPGA implementation where there are limitations on maximum clock frequency. The conventional approach to providing high performance on AES is to use a deep pipeline however this is ineffective on worst case traffic since minimum sized packets do not contain enough data to fill the pipeline. This core implements a pipelined and overlapped architecture with a number of proprietary implementation optimisations to deliver the required 40Gbit/sec performance even on worst case traffic.
This core is supplied as VHDL source code with a testbench which implements standard vectors from the GCM specification and a large test suite of vectors derived from a software implementation of AES-GCM.
AES GCM 40G
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Cipher Modes
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AES-GCM as specified for 802.1ae MACSEC
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Internal Data Path Width
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128 bits with pipelining and overlapping
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Functions
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Encrypt, Decrypt, Encrypt/Decrypt
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Key Lengths
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128 bits
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IV Length
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96 bits
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