{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the role of the SHA-256 algorithm in the blockchain?","a":"In blockchain, the  main role of the SHA-256 algorithm is to ensure the security, integrity, and tamper-proofness of the data. It achieves this by hashing the data, converting the original data into a fixed-length hash value, thereby achieving the following functions:\\n\\n1. Data Integrity: The SHA-256 algorithm has good collision resistance, meaning that even slight modifications to the input data result in significant changes in the output hash value. This allows the blockchain system to easily detect whether the data has been tampered with. \\n\\n2. Data Security: SHA-256 is a cryptographic hash function that provides security for the data. It is virtually impossible to reverse the hashing process and retrieve the original data from the hash value, ensuring that the data remains secure and confidential.\\n\\n3. Immutability: Once a block is added to the blockchain, it is virtually impossible to modify"}]}],"pr":"f00d2e2fc21bf9104f7831db258cacbcea742794b022eff2f066f22b1364244b"}