Security
myUTN User Manual Windows
83
6.1
How to Define the Encryption Strength for
SSL/TLS Connections
The following connections to and from the UTN server can be
encrypted via SSL/TLS:
• Email: POP3 (
• Email: SMTP (
• Web access to the myUTN Control Center: HTTPS (
• Data transfer between the clients and the UTN server (and the
connected USB devices): USB port (
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 UTN server 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 UTN server, 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)
