問61
頻出度★★★
ランサムウェアに関する記述として, 適切なものはどれか。
平成28年度 春期 ITパスポート試験 問61
テクノロジ系セキュリティ › 情報セキュリティ
This question's explanation and your answers so far.
解説
問 61
- ア
正解 Ransomware is a coined word combining “ransom” and “software.” Once it infects a system, it arbitrarily encrypts files on the PC or locks the PC itself so it can no longer be used, and demands money (a ransom) in exchange for restoring it (decrypting or unlocking). Choice ア, “It makes a PC or files unusable, and then demands money for their recovery,” describes exactly this behavior, so it is correct.
Incorrectイ
Automatically displaying advertisements on the computer screen describes “adware.” This is not an action that demands money, and it differs from ransomware.
Incorrectウ
Recording the information a user types on the keyboard (such as IDs and passwords) and sending it to an external party describes a “keylogger” or spyware; it is an action for stealing information, not a description of ransomware.
Incorrectエ
Infecting document files of word processing software or spreadsheet software describes a “macro virus,” which abuses the macro feature of documents. This is a different thing from ransomware, which holds files hostage to demand money.
ここがポイント
- Definition of ransomware: malware that holds data or a PC hostage by making it unusable and demands a ransom (money) in exchange for restoring it.
- Distinction from other malware: displaying advertisements = adware; recording and sending keyboard input = keylogger (spyware); infecting document files = macro virus.
用語