diff --git a/README.md b/README.md
index 1dd0907..82295c6 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,9 @@
 encfs-java
 ==========
 
-This branch contains a hack to cache decoded values better.
-This is to use with encfs-brute.
+I made the modifications for encfs-brute. The aim was
+
+1. to cache decoded values better,
+2. no exception throwing if the key is incorrect.
+
+Those two items are important to improve speed.
diff --git a/src/main/java/org/mrpdaemon/sec/encfs/EncFSPBKDF2Data.java b/src/main/java/org/mrpdaemon/sec/encfs/EncFSPBKDF2Data.java
index 56d4aae..4578184 100644
--- a/src/main/java/org/mrpdaemon/sec/encfs/EncFSPBKDF2Data.java
+++ b/src/main/java/org/mrpdaemon/sec/encfs/EncFSPBKDF2Data.java
@@ -30,24 +30,24 @@ public class EncFSPBKDF2Data
 	throws InvalidKeySpecException
 	{
 		byte[] cipherSaltData = config.getSaltData();
-		int keySizeInBytes = config.getConfig().getVolumeKeySizeInBits() / 8;
+		int keySizeInBits = config.getConfig().getVolumeKeySizeInBits();
 		KeySpec ks = new PBEKeySpec(password.toCharArray(), cipherSaltData,
 				config.getConfig().getIterationForPasswordKeyDerivationCount(),
-				(keySizeInBytes + EncFSVolume.IV_LENGTH_IN_BYTES) * 8
+				keySizeInBits + EncFSVolume.IV_LENGTH_IN_BYTES * 8
 		);
 		byte[] pbkdf2Data = skf.generateSecret(ks).getEncoded();
 
 		EncFSPBKDF2Data obj;
-		obj = EncFSPBKDF2Data.from(config, pbkdf2Data);
+		obj = EncFSPBKDF2Data.from(config.getConfig(), pbkdf2Data);
 		obj.password = password;
 		return obj;
 	}
 
-	public static EncFSPBKDF2Data from(EncFSBinaryConfig config, byte[] pbkdf2Data)
+	public static EncFSPBKDF2Data from(EncFSConfig config, byte[] pbkdf2Data)
 	throws InvalidKeySpecException
 	{
 		EncFSPBKDF2Data obj = new EncFSPBKDF2Data();
-		int keySizeInBytes = config.getConfig().getVolumeKeySizeInBits() / 8;
+		int keySizeInBytes = config.getVolumeKeySizeInBits() / 8;
 		obj.pbkdf2Data = pbkdf2Data;
 		obj.passKeyData = Arrays.copyOfRange(pbkdf2Data, 0, keySizeInBytes);
 		obj.passIvData = Arrays.copyOfRange(pbkdf2Data, keySizeInBytes,
diff --git a/src/main/java/org/mrpdaemon/sec/encfs/VolumeKey.java b/src/main/java/org/mrpdaemon/sec/encfs/VolumeKey.java
index 6f24bda..8752414 100644
--- a/src/main/java/org/mrpdaemon/sec/encfs/VolumeKey.java
+++ b/src/main/java/org/mrpdaemon/sec/encfs/VolumeKey.java
@@ -76,7 +76,7 @@ class VolumeKey {
 		EncFSPBKDF2Data pbkdf2DataObj;
 		try {
 			binaryConfig = EncFSBinaryConfig.from(config);
-			pbkdf2DataObj = EncFSPBKDF2Data.from(binaryConfig, pbkdf2Data);
+			pbkdf2DataObj = EncFSPBKDF2Data.from(config, pbkdf2Data);
 		} catch (Exception e) {
 			throw new EncFSInvalidConfigException(e);
 		}
@@ -212,7 +212,7 @@ class VolumeKey {
 		config.setBase64EncodedVolumeKey(EncFSBase64.encodeBytes(encodedVolKey));
 	}
 
-	private static class DecryptInfo {
+	protected static class DecryptInfo {
 		byte[] clearVolKeyData;
 		Mac mac;
 	}