HP-UX IPSec vA.03.00 Performance and Sizing White Paper

MD5 and HMAC-SHA1 authentication

The following charts display a comparison of throughput and CPU utilization measured for raw IP

data transmission and the following HP-UX IPSec transfer types:

• AH-MD5

• AH-SHA1

Throughput

Figure 1 shows the throughput rates in megabits per se

cond (Mb/s). The throughput rates for AH-

SHA1 are higher than the rates for AH-MD5. With message sizes greater than 1024 bytes, the AH-

SHA1 produces almost 50% better throughput rate than AH-MD5.

Figure 1. Single dual-core (2-way) throughput for raw IP, AH-MD5, and AH-SHA1

Single dual-core (2-way) throughput

100

200

300

400

500

600

700

800

900

1000

128 256 512 1024 2048 4096 8192 16384 32768

Message size (bytes)

Throughput (Mb/s)

Raw

AH-MD5

AH-SHA1