True or false: A strong cryptographic algorithm resistant to brute force attacks guarantees a secure system.

False — a secure implementation is also essential. A strong algorithm can be broken through side-channel attacks if poorly implemented.

A strong algorithm is necessary but not sufficient. Security also requires:

• Secure implementation — constant-time code, resistance to side-channel attacks
• Correct protocol usage — even AES can be insecure if used with the wrong mode of operation
• Proper key management — key generation, storage, rotation, destruction
• No software bugs — buffer overflows, timing leaks, etc.

Real-world example: A mathematically perfect RSA implementation can be broken with Simple Power Analysis (SPA) if the hardware leaks power consumption patterns that reveal key bits.

Tip: "A chain is only as strong as its weakest link" — this is the fundamental principle of applied cryptography.