return "1234567890123456"; // 16 bytes for AES
            }
        });

        // Create test cipher - use proper constructor with simple implementation
        InvertibleCryptographer cookieCipher = new InvertibleCryptographer("AES", "1234567890123456", null) {
            @Override
            public String encrypt(String plainText) {
                return "encrypted:" + plainText;
            }

import org.lastaflute.core.security.InvertibleCryptographer;
import org.lastaflute.web.servlet.cookie.CookieResourceProvider;

/**
 * The provider of cookie resource.
 *
 * @author jflute
 */
public class FessCookieResourceProvider implements CookieResourceProvider {

    protected final FessConfig harborConfig;
    protected final InvertibleCryptographer cookieCipher;

            inver = InvertibleCryptographer.createBlowfishCipher(fessConfig.getAppCipherKey());
        } else if ("des".equalsIgnoreCase(cipherAlgorithm)) {
            logger.warn("DES cipher is deprecated due to its 56-bit key size vulnerability. Please consider migrating to AES. algorithm={}",
                    cipherAlgorithm);
            inver = InvertibleCryptographer.createDesCipher(fessConfig.getAppCipherKey());