How Is GPON Data Protected on Fiber Networks?
GPON uses AES-128 encryption to protect data transmitted over the fiber optic network. Each ONU receives its own encryption key, ensuring that subscribers cannot decrypt each other's traffic even though they share the same fiber.
How Does GPON Encryption Work?
GPON security has three layers: AES-128 encryption at the data level, a key exchange protocol that rotates keys regularly, and the physical properties of passive optics. The OLT generates unique encryption keys for each ONU during registration. Keys are exchanged securely using the GPON management channel and rotated every few seconds.
Can Other Subscribers See My Data?
No. Although GPON uses a passive splitter that broadcasts downstream data to all ONUs, each ONU only accepts frames addressed to it. With AES-128 enabled, even if someone physically taps the fiber, they cannot decrypt the data without the session key.
What About EPON Security?
EPON (IEEE 802.3ah) uses Logical Link Identification (LLID) for traffic isolation. Some EPON implementations support encryption through MACsec (IEEE 802.1AE). For maximum security, choose GPON with AES-128 encryption enabled. Langzhi GPON ONU devices fully support AES-128 encryption.
