/**
 * Emoji alphabet for visual verification of shared secrets.
 *
 * This alphabet contains 256 distinct, easily recognizable emojis for
 * anti-spoofing verification. With 256 emojis, each emoji represents
 * exactly 8 bits of entropy (log2(256) = 8).
 *
 * A 3x3 grid of 9 emojis provides 72 bits of security (9 × 8 = 72 bits),
 * making brute-force attacks computationally infeasible for real-time
 * MITM verification scenarios.
 *
 * Selection criteria:
 * - Visually distinct from each other
 * - Commonly supported across platforms (Unicode 12+)
 * - Easy to recognize and compare at a glance
 * - No text-based or flag emojis (platform-dependent rendering)
 * - No variation selectors (base emojis only)
 *
 * @packageDocumentation
 */
/**
 * 256 distinct emojis for visual verification.
 * Index directly maps to byte value (0-255) for simple lookup.
 */
export declare const EMOJI_ALPHABET: readonly string[];
/**
 * Number of emojis in the alphabet.
 * Must be a power of 2 for clean bit mapping (256 = 2^8).
 */
export declare const EMOJI_ALPHABET_SIZE = 256;
/**
 * Bits of entropy per emoji (log2 of alphabet size).
 */
export declare const BITS_PER_EMOJI = 8;
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