問25
頻出度★★★
ブロックチェーンを適用した事例として, 最も適切なものはどれか。
令和7年度 ITパスポート試験 問25
This question's explanation and your answers so far.
解説
問 25
- ア
正解 Blockchain is a technology that chains transaction data together using hashes and manages it in a distributed manner. Its greatest strength is that once data is recorded it is very hard to tamper with later, and because many nodes share the same ledger, inconsistencies (such as double counting) are also unlikely to occur. Choice ア describes a case where digital corporate bonds (security tokens) are issued by electronic means for the purpose of “preventing tampering and inconsistencies in transactions,” which is exactly an application that leverages blockchain's strengths (tamper resistance and consistency). Therefore ア is the most appropriate.
Incorrectイ
Shortening the order-acceptance response time from over 1 second to under 1 second is an improvement in system processing performance and lower latency; it has nothing to do with blockchain's characteristic tamper resistance or distributed ledger. In fact, blockchain takes time to reach consensus and is not good at fast responses, so it is inappropriate as an application example.
Incorrectウ
A service that allows reservations to be changed any number of times up to 1 hour before departure is a matter of reservation-system specifications and customer-service ingenuity; there is no necessity to use blockchain. This is not a scenario that leverages technical characteristics such as tamper resistance or a distributed ledger, so it is inappropriate.
Incorrectエ
Storing a large volume of images and meeting audio in a database and making them searchable is a case of database construction and data utilization (a search system), not blockchain. The goal is centralized storage and searching of data, which does not require tamper resistance or distributed consensus, so it is inappropriate.
ここがポイント
- Blockchain is a technology that chains transaction data together with hashes and shares it across multiple nodes in a distributed way; its core value is being extremely hard to tamper with and preventing transaction inconsistencies. Uses where “tamper prevention and ensuring consistency” provide the value, such as digital corporate bonds (security tokens), are typical application examples.
- Be able to distinguish that mere processing speedup, service improvement, or database search does not require blockchain's characteristics (tamper resistance, distributed ledger), and therefore does not count as a blockchain application example.
用語