Seamless connectivity utilizing multi-domain security by storing a global key on each participant computing devices. When a participant computing device tries to connect to a network, the network sends encryption keys for that network in response to that participant computing device providing the global key and not being blacklisted. The participant computing device can then connect to the network using that network's encryption key. A meta-message container is generated for the message based on a next participant in a route from the transmitting participant to the destination participant. One or more series of one or more line items are generated for the message, with each line item being tagged tag with network information. The line items are encrypted based on the network information. The meta-message container and the encrypted series of line items are then transmitted to the next participant.