export declare class SecureCellContextImprint {
    private masterKey;
    constructor(masterKey: Uint8Array);
    /**
     * Makes a new Secure Cell in Context Imprint mode with given master key.
     *
     * @param masterKey     non-empty array of master key bytes (Buffer or Uint8Array)
     *
     * @returns a new instance of SecureCellContextImprint.
     *
     * @throws TypeError if the master key is not a byte buffer.
     * @throws ThemisError if the master key is empty.
     */
    static withKey(masterKey: Uint8Array): SecureCellContextImprint;
    encrypt(message: Uint8Array, context: Uint8Array): Uint8Array;
    decrypt(message: Uint8Array, context: Uint8Array): Uint8Array;
}