Dear all,
Sorry to bother you again. The following table shows the time
recorded for each process. The program basically can be categorized as
follows:
1. host get id number from ring
2. host get random number generated in the ring from ring
3. host get the hash (sha-1) generated in the ring from ring
Instruction Max Time(ms) Average Time(ms)
--------------------------------------------------------
host get id number
from the ring 1652 1648
--------------------------------------------------------
ring generate
random number
and send to host
(host ask for it) 1713 1684
--------------------------------------------------------
ring generate
SHA-1 with id
and random number
and send to host
(host ask for it) 1672 1657
---------------------------------------------------------
I have several questions:
1. Does that mean that:
sending a command APDU and getting back a response APDU
needs about 1.6 seconds (shown in host get id number from ring)?
2. Does that mean that ring needs about 1684-1648= 36 miliseconds to
generate the random number (of 4 bytes)?
3. Does that mean that ring needs about 1657-1648= 9 miliseconds to
generate the SHA-1 message (taking 64 bytes input and produce a digest
message of 20 bytes)?
I do hope that you could help me with these kind of
measurements. Thousand thanks for your kindness and help. Wish you all the
best.
Best regards,
Cheun Ngen CHONG
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