How is data shared securely among participants in a blockchain network?

Data is shared securely among participants in a blockchain network primarily through the use of cryptographic techniques and access controls. This approach ensures that only authorized parties have the ability to view or manipulate the data on the blockchain.

Cryptography plays a crucial role in maintaining the integrity and confidentiality of data. For instance, data is often encrypted, meaning it is transformed into a secure format that can only be read by individuals who possess the appropriate decryption keys. This not only safeguards sensitive information but also protects against unauthorized access and tampering.

Access controls serve as additional security measures, determining what data can be accessed by which participants. By implementing permissions and roles, the blockchain can limit visibility and permissions to specific users or groups, ensuring that sensitive information is shared only among trusted participants in the network.

This combination of cryptographic techniques and access controls fundamentally underpins the trustless nature of blockchain technology, allowing multiple parties to share information in a secure manner without relying on a central authority to oversee transactions or data integrity.