export declare function generateMasterKey(): Uint8Array;
export declare function encrypt(plaintext: Uint8Array, key: Uint8Array): {
    ciphertext: Uint8Array;
    iv: Uint8Array;
    tag: Uint8Array;
};
export declare function decrypt(ciphertext: Uint8Array, key: Uint8Array, iv: Uint8Array, tag: Uint8Array): Uint8Array;