Intellectual Olympiad in Information Security Systems - 2026 ongoing

Subject: Information Security Systems
Level: X
Category: student
Quiz questions: in English
Example question: A web service encrypts records with AES-GCM but accidentally reuses the same nonce with the same key for two different plaintexts. Which security consequence is most serious? The encryption key is automatically rotated, Only the ciphertext length becomes hidden, Confidentiality and authentication guarantees can be compromised, The algorithm changes from symmetric to asymmetric encryption