Abstract: Techniques and architecture are described for securing traffic between nodes of a network against quantum computing attacks. For example, a first node of a network generates a random number input string and provides the random number input string to a second node. The first node may use the random number input string to generate at least one first key and an associated identifier. The first node may forward the associated identifier to the second node. Using the random number input string, the second node may generate at least one second key. Based at least in part on the associated identifier, the second node may select the at least one second key as a common encryption key. The at least one second key and the at least one first key are identical. Based at least in part on the common encryption key, the nodes may encrypt and decrypt traffic between them.