/**
 * Constant-time comparison utilities for security-sensitive operations.
 * These functions prevent timing attacks by ensuring comparison time
 * is independent of input values.
 *
 * Uses a pure JavaScript implementation for browser compatibility.
 */
/**
 * Compare two Uint8Arrays in constant time.
 * This implementation XORs all bytes and accumulates differences,
 * ensuring the comparison time is independent of where differences occur.
 *
 * @param a First array
 * @param b Second array
 * @returns true if arrays are equal, false otherwise
 */
export declare function constantTimeEqual(a: Uint8Array, b: Uint8Array): boolean;
/**
 * Compare two buffers in constant time.
 * This implementation XORs all bytes and accumulates differences,
 * ensuring the comparison time is independent of where differences occur.
 *
 * @param a First buffer
 * @param b Second buffer
 * @returns true if buffers are equal, false otherwise
 */
export declare function constantTimeEqualBuffer(a: Buffer, b: Buffer): boolean;
/**
 * Compare two arrays in constant time (converts to Uint8Array)
 * @param a First array
 * @param b Second array
 * @returns true if arrays are equal, false otherwise
 */
export declare function constantTimeEqualArray(a: number[], b: number[]): boolean;
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