Oki Data CONFIDENTIAL
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7.8.5 Other Questions
This section covers more questions users may ask.
7.8.5.1 Time required for creating a certificate
The time required for creating a certificate is more likely to be as follows, varying with the key exchange
method (RSA, Diffie-Hellman (DSS))and the key size:
(Variation is from about -30 to +30%)
Table 7-5 Time for creating a Certificate (for RSA) Unit: Sec
*1: CSR (Certificate Signing Request)
Table 7-6 Time for creating a certificate (for DSS) Unit: Sec
RSA
Creating a self-signed certificate
CA-signed Creating CSR*
1
certificate
Installing the certificate
512bits
6
7
6
1,024bits
8
10
6
2,048bits
25
23
6
Diffie-Hellman(DSS)
Creating a self-signed certificate
CA-signed Creating CSR
certificate
Installing the certificate
512bits
21
35
8
1,024bits
42
27
6
2,048bits
129*
2
123
8
*2: In case of 2048bits key, it may take about 3
minutes (165sec) to create the certificate and CSR.
7.8.5.2 Communication time when encryption function is enabled
We have compared the communication time when the encryption feature is used against the normal
communication time, and describe the result in this section.
The following are the time displayed on Web's TOP page:
Web's TOP page means the first screen that is displayed in the Web screen for the printer setup.
Table 7-7 Time displayed on Web's TOP page (for RSA) Unit: Sec
RSA
Cipher level Strong
Standard
Weak
512bits
5
5
4
1,024bits
5
5
5
2,048bits
7
7
7
No encryption
3
Table 7-8 Time displayed on Web's TOP page (for Diffie-Hellman (DSS)) Unit: Sec
Diffie-Hellman(DSS)
Cipher level Strong
Standard
Weak
512bits
5
5
-
1,024bits
5
5
-
2,048bits
6
6
-
No encryption
3
Public key size
Public key size
Public key size
Public key size