Configuring Settings for Key Pairs and Digital
Certificates
0X7U-04K
In order to encrypt communication with a remote device, an encryption key must be sent and received over an
unsecured network beforehand. This problem is solved by public-key cryptography. Public-key cryptography ensures
secure communication by protecting important and valuable information from attacks, such as sniffing, spoofing, and
tampering of data as it flows over a network.
Key Pair
A key pair consists of a public key and a secret key, both of which are required for encrypting or
decrypting data. Because data that has been encrypted with one of the key pair cannot be
returned to its original data form without the other, public-key cryptography ensures secure
communication of data over the network. Up to eight key pairs, including the preinstalled pairs,
can be registered ( Using CA-issued Key Pairs and Digital Certificates(P. 326) ). For TLS
encrypted communication, a key pair can be generated for the machine ( Generating Key
Pairs(P. 317) ).
CA Certificate
Digital certificates including CA certificates are similar to other forms of identification, such as
driver's licenses. A digital certificate contains a digital signature, which enables the machine to
detect any spoofing or tampering of data. It is extremely difficult for third parties to abuse
digital certificates. A digital certificate that contains a public key of a certification authority (CA)
is referred to as a CA certificate. CA certificates are used for verifying the device the machine is
communicating with for features such as printing with Google Cloud Print or IEEE 802.1X
authentication. Up to 150 CA certificates can be registered, including the 72 certificates that are
preinstalled in the machine ( Using CA-issued Key Pairs and Digital Certificates(P. 326) ).
◼
Key and Certificate Requirements
The certificate contained in a key pair generated with the machine conforms to X.509v3. If you install a key pair or a CA
certificate from a computer, make sure that they meet the following requirements:
Format
●
Key pair: PKCS#12
*1
●
CA certificate:
X.509v1 DER (encoded binary)
X.509v3 DER (encoded binary)
File extension
●
Key pair: ".p12" or ".pfx"
●
CA certificate: ".cer"
Public key algorithm
(and key length)
●
Key Pair: RSA (512 bits
*2
, 1024 bits, 2048 bits, 4096 bits)
●
CA Certificate:
RSA (512 bits
*2
, 1024 bits, 2048 bits, 4096 bits)
DSA (1024 bits/2048 bits/3072 bits)
*1
Requirements for the certificate contained in a key pair are pursuant to CA certificates.
*2
Not supported when the operating system of the device the machine communicates with is Windows 8/Server 2012. Encrypted
communication may also be unavailable with other Windows versions depending on the program update status.
*3
SHA384-RSA and SHA512-RSA are available only when the RSA key length is 1024 bits or more.
Security
315
Summary of Contents for LBP352
Page 1: ...LBP352x LBP351x User s Guide USRMA 0699 00 2016 05 en Copyright CANON INC 2016...
Page 7: ...Notice 629 Office Locations 633 VI...
Page 84: ...Printing a Document 77...
Page 99: ...LINKS Basic Printing Operations P 78 Printing a Document 92...
Page 111: ...LINKS Basic Printing Operations P 78 Printing a Document 104...
Page 142: ...LINKS Using the Encrypted Print P 136 Installing an SD Card P 583 Printing a Document 135...
Page 163: ...LINKS Printing without Opening a File Direct Print P 146 Printing a Document 156...
Page 175: ...Can Be Used Conveniently with a Mobile Device 168...
Page 248: ...LINKS Entering Sleep Mode P 68 Network 241...
Page 288: ...Printing a Document Stored in the Machine Stored Job Print P 137 Security 281...
Page 294: ...Functions of the Keys Operation Panel P 24 Security 287...
Page 332: ...Using TLS for Encrypted Communications P 294 Configuring IPSec Settings P 298 Security 325...
Page 342: ...Using Remote UI 335...
Page 357: ...LINKS Remote UI Screens P 336 Using Remote UI 350...
Page 381: ...Paper Source 0X7U 058 See Select Feeder Menu P 453 Setting Menu List 374...
Page 469: ...Troubleshooting 462...
Page 533: ...8 Close the top cover Maintenance 526...
Page 551: ...LINKS Utility Menu P 445 Job Menu P 449 Maintenance 544...
Page 562: ...Third Party Software 0X7U 08U Appendix 555...
Page 607: ...Manual Display Settings 0X7U 08W Appendix 600...
Page 632: ...Scalable Fonts PCL Appendix 625...
Page 633: ...Appendix 626...
Page 634: ...Appendix 627...
Page 635: ...OCR Code Scalable Fonts PCL Bitmapped Fonts PCL Appendix 628...