22What is 'harvest now, decrypt later', and how would you plan a post-quantum migration?▼hardNewGoogleMicrosoftApple◆ premiumData encrypted today can be recorded and decrypted when a capable quantum computer exists. The scored answer prioritises by how long data must stay secret, starts with key exchange, and builds crypto agility.Open full answer →
28What is crypto agility, how do downgrade attacks exploit it, and how would you plan a migration to post-quantum algorithms?▼hardNewGoogleMicrosoftApple◆ premiumBeing able to switch algorithms is essential. Letting an attacker choose which algorithm you switch to is a vulnerability with a long history.Open full answer →