What’s the Line Encryption of GPON

Context

In the PON system, downstream data is broadcast to all ONUs. As a result, downstream data destined for certain ONUs or all ONUs may be intercepted by illegal users.

Figure 1 Downstream data transmit process 

Working Principle

Line encryption technologies are required to eliminate the data theft risk, Figure 2 shows line encryption process.

Figure 2 Line encryption process 

· The encryption algorithm to be used is the advanced encryption standard (AES).

· The 10G GPON systems use the AES-128 encryption algorithm.

Highlight and Application

· The line encryption algorithms neither increase overhead nor decrease bandwidth usages.

· The line encryption algorithms will not prolong transmission delays.

· Enable line encryption if the usage scenarios promote high security requirements

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