Asynchrony in computer science refers to the occurrence of events that are unrelated to the actual program. Events in an asynchronous system synchronize activities rather than a universal clock signal (changes in the system). Asynchronous systems do not rely on external signals or messages to function successfully.

Asynchronous systems are constructed in a modular fashion. Each module in such a network can function independently while still connecting with others. These interrelated components finally come together to form a working solution/system. Asynchronous communication is a procedure in which data is sent sequentially rather than in a continuous stream. Individuals post messages at various times in online forums or via email, for example.

In the crypto space, asynchronous or semi-synchronous blockchain networks are commonly employed. Because networks provide no feedback to nodes on the status of the data they are transmitting, different nodes may have differing perspectives on the network's overall effect. Transaction throughput increases because nodes no longer have to wait for their messages to be processed by other nodes.

The goal of semi-synchronous networks is to avoid any splits in the network's global state. This can jeopardize the nodes' unanimity. These networks place a premium on dependability and accessibility. The promotion of accessibility will aid in the completion of all transactions without delay. However, if a network prioritizes consistency, some transactions may be skipped or delayed until all previous transactions have been validated.