export declare function generateUUID(): string;
export declare function generateRandomBytes(length: number): Uint8Array;
export declare function generateRandomHex(length: number): string;
export declare function deriveSharedKey(pairingCode: string, salt: string): string;
export declare function computeAuthHash(sharedKeyHex: string): string;
export declare function computeHMAC(sharedKeyHex: string, payload: unknown): string;
export declare function verifyHMAC(sharedKeyHex: string, payload: unknown, signature: string): boolean;
