What Are the Security Implications of a Low Mining Difficulty?

A low mining difficulty can pose significant security risks to a Proof-of-Work blockchain. It implies that a relatively small amount of computational power (hashrate) is needed to mine new blocks.

This low barrier makes the network more vulnerable to a 51% attack, where a single entity or group could gain control of the majority of the network's hashrate. With such control, an attacker could potentially reverse transactions, double-spend coins, and prevent legitimate transactions from being confirmed.

Therefore, a sufficiently high difficulty is crucial for network security.