What is a secure and decentralized digital ledger that records transactions across many computers?

A secure and decentralized digital ledger that records transactions across many computers is known as blockchain. This technology operates on a peer-to-peer network, where each participant (or node) has access to the entire database, allowing them to independently verify the authenticity of transactions.

Blockchain's decentralization means that it does not have a single point of control or failure, making it inherently secure and resilient against tampering or fraud. Each transaction is encrypted and linked to the previous one, forming a chain of blocks, which ensures transparency and traceability. Such properties make blockchain particularly useful for applications like cryptocurrencies, supply chain management, and secure voting systems.

In contrast, the other options like artificial intelligence, no code/low code platforms, and cybersecurity do not serve the specific function of recording transactions on a decentralized ledger. Artificial intelligence focuses on creating systems that can perform tasks that would normally require human intelligence, while no code/low code platforms simplify software development processes, allowing users to create applications without extensive coding knowledge. Cybersecurity encompasses the measures to protect systems, networks, and programs from digital attacks rather than serving as a digital ledger technology.