What is blockchain?
Quick answer
A blockchain is a shared record of transactions, copied across many computers and chained together cryptographically so that earlier entries cannot be altered unnoticed.
Students build a simple chain by hand, then break it, to see exactly what tamper-evidence means.
In context
Stripped of the market noise, it is a lesson in trust, verification and incentive design.
Students who understand hashing and consensus can evaluate claims about the technology instead of absorbing them.
In a NASCA classroom
Students build a simple chain by hand, then break it, to see exactly what tamper-evidence means.
Related terms
Cyber security
Cyber security is the practice of protecting systems, devices and data from unauthorised access, covering both technical controls and the human habits that defeat them.
Quantum computing
Quantum computing uses quantum bits, which can hold combinations of states, to attack a narrow class of problems that conventional computers find impractically slow.
Student data privacy
Student data privacy covers how a school and its partners collect, store, share and delete information about children, under frameworks such as India's DPDP Act, the GDPR and FERPA.