One-Time Pad is theoretically perfectly secure: plaintext is XORed with a truly random key of equal length, used only once.
CTF Weakness
Key reuse (Many-Time Pad): C1 XOR C2 = P1 XOR P2 → statistical analysis recovers plaintext.
One-Time Pad is theoretically perfectly secure: plaintext is XORed with a truly random key of equal length, used only once.
Key reuse (Many-Time Pad): C1 XOR C2 = P1 XOR P2 → statistical analysis recovers plaintext.