A quick try on google revealed a couple of hits indicating that yes DSP
chips are used for IPSec encryption/decryption.
http://www.ssh.com/about/press/2000/release08062000(2).cfm
http://business.vsnl.com/kbs/dsp.html
http://www.broadcom.com/pbs/BCM3352.pdf
for example.
Seeing that, and knowin
The 3000 VPN concentrators do encryption via software. The 3015 and above
models can use the Scalable Encryption Processor (SEP) hardware accelerators
to offload the encryption processing.
According to the documentation, the 3030 and above can use a "programmable
DSP-based security accelerator".
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