Question 1

What is AES and why is it used?

Accepted Answer

AES (Advanced Encryption Standard) is the most widely used symmetric encryption algorithm. Approved by NIST in 2001, it is used to protect everything from disk encryption and HTTPS traffic to payment card data and government classified information.

Question 2

What is the difference between AES-128, AES-192, and AES-256?

Accepted Answer

The numbers refer to key length in bits. AES-256 is the strongest and most widely recommended for new applications. AES-128 is still considered secure against brute force but has a smaller security margin compared to AES-256.

Question 3

Is a randomly generated AES key safe to use?

Accepted Answer

Yes, if generated with a cryptographically secure random number generator (CSPRNG). This tool uses the Web Crypto API (crypto.getRandomValues) which meets that standard. Never use AES keys derived from weak passwords without proper key derivation (PBKDF2, Argon2).

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