Security
TPR User Manual
60
7.1
How to Define the Encryption Level for SSL/TLS
Connections
The following connections on the TPR can be encrypted via SSL/TLS:
• Email: POP3 (
• Personal Printing: connection to the server (
• ThinPrint printer: IPP connection (
51)
• ThinPrint: data encryption (
• Web access to the TPR Control Center: HTTPS (
Encryption
strength
The encryption strength and thus the safety of the connection is
defined via the encryption protocol and level.
Protocol
The encryption protocols SSL (Secure Sockets Layer) and its succes-
sor TLS (Transport Layer Security) are used to encrypt the connec-
tions. Which protocols are supported by the TPR depends on the
product hardware and the installed firmware/software.
Encryption
Level
Each encryption level is a collection of so-called cipher suites. A
cipher suite is a standardized sequence of four cryptographic algo-
rithms that are used to establish a secure connection. Depending on
their cipher strength, cipher suites are grouped to form an encryp-
tion level. Which cipher suites are supported by the TPR, i.e. are part
of an encryption level, depends on the SSL/TLS protocol used.
The following encryption levels can be selected:
•
Any:
The encryption is automatically negotiated by both
communicating parties. The strongest encryption supported by
both parties will always be chosen.
•
Low:
Only cipher suites with a low encryption are used. (Fast
data transfer)
• Medium
• High:
Only cipher suites with an strong encryption are used.
(Slow data transfer)
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