# Tutorial 43: On-Chain Randomness

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In decentralized applications (dApps), randomness plays a crucial role in a variety of use cases, from  decentralized protocols requiring unpredictable outcomes. However, **on-chain randomness** introduces significant challenges in ensuring that the random values generated are not predictable or exploitable by malicious actors. When randomness is generated directly on-chain, it can be subject to manipulation, making it a prime target for attackers looking to gain an unfair advantage.

In this section, we will explore how on-chain randomness is typically implemented, the potential vulnerabilities it introduces, and how these weaknesses can be exploited. By understanding the risks associated with on-chain randomness, we can discuss best practices and strategies to create more secure and tamper-resistant systems.