Abstract: A black core network system and method, wherein the system includes a ciphertext network, a server having a bonding module and a plurality of network interfaces, a plurality of encryptor devices and one or more routers, wherein each router is connected through one or more of the server network interfaces to the server and through one or more encryptor devices to the ciphertext network. The server establishes, in the bonding module, a server gateway for each server network interface, selects a first network interface as primary link and a second server network interface as backup link, and sends routing metric information out through the primary link and the backup link, wherein sending includes sending metric information indicating that the cost of routing through the primary link is less than the cost of routing through the backup link.

Abstract: In a network having an encryptor device having an encryption module, a plaintext interface and a ciphertext interface, wherein the encryption module encrypts data transferred from the plaintext interface to a black network through the ciphertext interface and decrypts data transferred from the ciphertext interface to a plaintext network through the plaintext interface, wherein the plaintext interface can be connected through the plaintext link to a plaintext network and wherein the ciphertext interface can be connected through a ciphertext link to a black network, a system and method for reflecting a link failure. A link failure is detected at the ciphertext interface and the link failure is reflected to the plaintext interface.

Abstract: A black core network system and method, wherein the system includes a ciphertext network, a server having a bonding module and a plurality of network interfaces, a plurality of encryptor devices and one or more routers, wherein each router is connected through one or more of the server network interfaces to the server and through one or more encryptor devices to the ciphertext network. The server establishes, in the bonding module, a server gateway for each server network interface, selects a first network interface as primary link and a second server network interface as backup link, and sends routing metric information out through the primary link and the backup link, wherein sending includes sending metric information indicating that the cost of routing through the primary link is less than the cost of routing through the backup link.

Abstract: In a network having an encryptor device having an encryption module, a plaintext interface and a ciphertext interface, wherein the encryption module encrypts data transferred from the plaintext interface to a black network through the ciphertext interface and decrypts data transferred from the ciphertext interface to a plaintext network through the plaintext interface, wherein the plaintext interface can be connected through the plaintext link to a plaintext network and wherein the ciphertext interface can be connected through a ciphertext link to a black network, a system and method for reflecting a link failure. A link failure is detected at the ciphertext interface and the link failure is reflected to the plaintext interface.