The ciphertexts can be represented as points inside a triangle whose vertices represent the three possible plaintexts. The higher the probability that a given ciphertext encodes a particular plaintext, the closer it is to the corresponding vertex: Ciphertexts more likely to encode A than B or C are closer to vertex A than to vertices B and C. A secure encryption scheme is one in which the points describing the ciphertexts are clustered together, rather than spread out around the triangle. That means that no ciphertext gives an adversary any more information about the scheme than any other.