問20
頻出度★★☆
ICカードと磁気カードの偽造に対する安全性の比較に関する記述のうち，適切なものはどれか。
平成21年度 秋期 ITパスポート試験 問20
ストラテジ系ビジネスインダストリ › ビジネスシステム
This question's explanation and your answers so far.
解説
問 20
- ア
正解 The correct answer is “ア”. An IC card stores information in an IC chip (integrated circuit) embedded inside the card, and because the chip itself has computing power, it can encrypt the stored data and perform authentication and access control for read requests from outside. The key information inside the chip is structured so that it cannot be read directly from outside (tamper resistance), and some chips even destroy the data if someone tries to read it illegally. A magnetic card, on the other hand, simply records information on a magnetic stripe almost as it is, so anyone with a dedicated read/write device can read the contents and copy them onto another card (skimming). Therefore the statement “IC cards store information in an IC chip and encrypt the information, so they are harder to forge than magnetic cards” is appropriate.
Incorrectイ
The medium in which an IC card records information is the IC chip, not a two-dimensional code. A two-dimensional code (such as a QR code) is an optical symbol printed on paper or a label; anyone can photograph and copy it, so its resistance to forgery is in fact low. The first half of the statement is factually wrong.
Incorrectウ
It is true that a magnetic card stores information on a magnetic stripe, but its protection mechanism is not more complex than that of an IC card — it is simpler. A magnetic stripe has no encryption or authentication mechanism, and its contents can be copied with a read/write device, so it is easier to forge than an IC card. The direction of the comparison is reversed.
Incorrectエ
A magnetic card records information on a magnetic stripe, not with a barcode. Moreover, a barcode is merely a printed pattern that is easy to copy, so even if it were used, it could not be said to be harder to forge than an IC card. Both the recording method and the conclusion are wrong.
ここがポイント
- An IC card stores information in an IC chip and prevents illegal reading and copying through encryption, authentication, and tamper resistance; a magnetic card only records information on a magnetic stripe and has no such protection mechanisms.
- Resistance to forgery and skimming is: IC card > magnetic card. In addition, two-dimensional codes and barcodes are optically printed symbols that are easy to copy, so their resistance to forgery is not high.
用語