diff --git a/jni/NativeFormats/JavaNativeFormatPlugin.cpp b/jni/NativeFormats/JavaNativeFormatPlugin.cpp
index b7fb3915d..659c5f108 100644
--- a/jni/NativeFormats/JavaNativeFormatPlugin.cpp
+++ b/jni/NativeFormats/JavaNativeFormatPlugin.cpp
@@ -130,6 +130,17 @@ JNIEXPORT jint JNICALL Java_org_geometerplus_fbreader_formats_NativeFormatPlugin
 	return 0;
 }
 
+extern "C"
+JNIEXPORT jstring JNICALL Java_org_geometerplus_fbreader_formats_NativeFormatPlugin_readEncryptionType(JNIEnv* env, jobject thiz, jobject javaBook) {
+	shared_ptr<FormatPlugin> plugin = findCppPlugin(thiz);
+	if (plugin.isNull()) {
+		return AndroidUtil::createJavaString(env, FormatPlugin::EncryptionType::UNKNOWN);
+	}
+
+	shared_ptr<Book> book = Book::loadFromJavaBook(env, javaBook);
+	return AndroidUtil::createJavaString(env, plugin->readEncryptionType(*book));
+}
+
 extern "C"
 JNIEXPORT void JNICALL Java_org_geometerplus_fbreader_formats_NativeFormatPlugin_readUidsNative(JNIEnv* env, jobject thiz, jobject javaBook) {
 	shared_ptr<FormatPlugin> plugin = findCppPlugin(thiz);
diff --git a/jni/NativeFormats/fbreader/src/formats/FormatPlugin.cpp b/jni/NativeFormats/fbreader/src/formats/FormatPlugin.cpp
index 6e9768c97..1084107ed 100644
--- a/jni/NativeFormats/fbreader/src/formats/FormatPlugin.cpp
+++ b/jni/NativeFormats/fbreader/src/formats/FormatPlugin.cpp
@@ -28,6 +28,10 @@
 
 #include "../library/Book.h"
 
+const std::string FormatPlugin::EncryptionType::NONE = "none";
+const std::string FormatPlugin::EncryptionType::UNKNOWN = "unknown";
+const std::string FormatPlugin::EncryptionType::MARLIN = "marlin";
+
 bool FormatPlugin::detectEncodingAndLanguage(Book &book, ZLInputStream &stream, bool force) {
 	std::string language = book.language();
 	std::string encoding = book.encoding();
@@ -99,6 +103,10 @@ const std::string &FormatPlugin::tryOpen(const ZLFile&) const {
 	return EMPTY;
 }
 
+const std::string &FormatPlugin::readEncryptionType(Book &book) const {
+	return EncryptionType::NONE;
+}
+
 shared_ptr<const ZLImage> FormatPlugin::coverImage(const ZLFile &file) const {
 	return 0;
 }
diff --git a/jni/NativeFormats/fbreader/src/formats/FormatPlugin.h b/jni/NativeFormats/fbreader/src/formats/FormatPlugin.h
index e32d0d31c..e0ebb7f40 100644
--- a/jni/NativeFormats/fbreader/src/formats/FormatPlugin.h
+++ b/jni/NativeFormats/fbreader/src/formats/FormatPlugin.h
@@ -46,6 +46,15 @@ public:
 
 class FormatPlugin {
 
+public:
+	class EncryptionType {
+
+	public:
+		static const std::string NONE;
+		static const std::string UNKNOWN;
+		static const std::string MARLIN;
+	};
+
 protected:
 	FormatPlugin();
 
@@ -58,6 +67,7 @@ public:
 
 	virtual const std::string &tryOpen(const ZLFile &file) const;
 	virtual bool readMetaInfo(Book &book) const = 0;
+	virtual const std::string &readEncryptionType(Book &book) const;
 	virtual bool readUids(Book &book) const = 0;
 	virtual bool readLanguageAndEncoding(Book &book) const = 0;
 	virtual bool readModel(BookModel &model) const = 0;
diff --git a/jni/NativeFormats/fbreader/src/formats/oeb/OEBEncryptionReader.cpp b/jni/NativeFormats/fbreader/src/formats/oeb/OEBEncryptionReader.cpp
index 360c5cfcb..3b4bbe9ea 100644
--- a/jni/NativeFormats/fbreader/src/formats/oeb/OEBEncryptionReader.cpp
+++ b/jni/NativeFormats/fbreader/src/formats/oeb/OEBEncryptionReader.cpp
@@ -21,28 +21,31 @@
 #include <ZLLogger.h>
 #include <ZLXMLNamespace.h>
 
+#include "../FormatPlugin.h"
 #include "OEBEncryptionReader.h"
 
-OEBEncryptionReader::OEBEncryptionReader() : myType("unknown") {
+OEBEncryptionReader::OEBEncryptionReader() : myIsMarlin(false) {
 }
 
-std::string OEBEncryptionReader::readEncryptionInfo(const ZLFile &epubFile) {
+const std::string &OEBEncryptionReader::readEncryptionInfo(const ZLFile &epubFile) {
 	shared_ptr<ZLDir> epubDir = epubFile.directory();
-	if (!epubDir.isNull()) {
-		const ZLFile rightsFile(epubDir->itemPath("META-INF/rights.xml"));
-		if (rightsFile.exists()) {
-			readDocument(rightsFile);
-		} else {
-			myType = "none";
-		}
+	if (epubDir.isNull()) {
+		return FormatPlugin::EncryptionType::UNKNOWN;
+	}
+
+	const ZLFile rightsFile(epubDir->itemPath("META-INF/rights.xml"));
+	if (rightsFile.exists()) {
+		readDocument(rightsFile);
+		return myIsMarlin
+			? FormatPlugin::EncryptionType::MARLIN
+			: FormatPlugin::EncryptionType::UNKNOWN;
+	} else {
+		return FormatPlugin::EncryptionType::NONE;
 	}
-	return myType;
 }
 
 void OEBEncryptionReader::startElementHandler(const char *tag, const char **attributes) {
-	if (testTag(ZLXMLNamespace::MarlinEpub, "Marlin", tag)) {
-		myType = "marlin";
-	}
+	myIsMarlin = testTag(ZLXMLNamespace::MarlinEpub, "Marlin", tag);
 	interrupt();
 }
 
diff --git a/jni/NativeFormats/fbreader/src/formats/oeb/OEBEncryptionReader.h b/jni/NativeFormats/fbreader/src/formats/oeb/OEBEncryptionReader.h
index e271f638d..f0da79b6a 100644
--- a/jni/NativeFormats/fbreader/src/formats/oeb/OEBEncryptionReader.h
+++ b/jni/NativeFormats/fbreader/src/formats/oeb/OEBEncryptionReader.h
@@ -29,14 +29,14 @@ class OEBEncryptionReader : public ZLXMLReader {
 
 public:
 	OEBEncryptionReader();
-	std::string readEncryptionInfo(const ZLFile &file);
+	const std::string &readEncryptionInfo(const ZLFile &file);
 
 private:
 	void startElementHandler(const char *tag, const char **attributes);
 	bool processNamespaces() const;
 
 private:
-	std::string myType;
+	bool myIsMarlin;
 };
 
 #endif /* __OEBENCRYPTIONREADER_H__ */
diff --git a/jni/NativeFormats/fbreader/src/formats/oeb/OEBPlugin.cpp b/jni/NativeFormats/fbreader/src/formats/oeb/OEBPlugin.cpp
index 06dd6b75a..39cea990b 100644
--- a/jni/NativeFormats/fbreader/src/formats/oeb/OEBPlugin.cpp
+++ b/jni/NativeFormats/fbreader/src/formats/oeb/OEBPlugin.cpp
@@ -129,7 +129,7 @@ bool OEBPlugin::readMetaInfo(Book &book) const {
 	return OEBMetaInfoReader(book).readMetaInfo(opfFile(file));
 }
 
-std::string OEBPlugin::readEncryptionType(Book &book) const {
+const std::string &OEBPlugin::readEncryptionType(Book &book) const {
 	return OEBEncryptionReader().readEncryptionInfo(epubFile(book.file()));
 }
 
@@ -139,8 +139,6 @@ bool OEBPlugin::readUids(Book &book) const {
 }
 
 bool OEBPlugin::readModel(BookModel &model) const {
-	ZLLogger::Instance().registerClass("encryption");
-	ZLLogger::Instance().println("encryption", "ENCRYPTION TYPE = " + readEncryptionType(*model.book()));
 	const ZLFile &file = model.book()->file();
 	return OEBBookReader(model).readBook(opfFile(file));
 }
diff --git a/jni/NativeFormats/fbreader/src/formats/oeb/OEBPlugin.h b/jni/NativeFormats/fbreader/src/formats/oeb/OEBPlugin.h
index 66b55faf4..4cb7f738a 100644
--- a/jni/NativeFormats/fbreader/src/formats/oeb/OEBPlugin.h
+++ b/jni/NativeFormats/fbreader/src/formats/oeb/OEBPlugin.h
@@ -33,7 +33,7 @@ public:
 	bool providesMetaInfo() const;
 	const std::string supportedFileType() const;
 	bool readMetaInfo(Book &book) const;
-	std::string readEncryptionType(Book &book) const;
+	const std::string &readEncryptionType(Book &book) const;
 	bool readUids(Book &book) const;
 	bool readLanguageAndEncoding(Book &book) const;
 	bool readModel(BookModel &model) const;
diff --git a/src/org/geometerplus/fbreader/formats/FormatPlugin.java b/src/org/geometerplus/fbreader/formats/FormatPlugin.java
index 3d99364d9..edc442f4d 100644
--- a/src/org/geometerplus/fbreader/formats/FormatPlugin.java
+++ b/src/org/geometerplus/fbreader/formats/FormatPlugin.java
@@ -28,6 +28,12 @@ import org.geometerplus.fbreader.bookmodel.BookModel;
 import org.geometerplus.fbreader.bookmodel.BookReadingException;
 
 public abstract class FormatPlugin {
+	public interface EncryptionType {
+		String NONE = "none";
+		String UNKNOWN = "unknown";
+		String MARLIN = "marlin";
+	}
+
 	private final String myFileType;
 
 	protected FormatPlugin(String fileType) {
@@ -42,6 +48,7 @@ public abstract class FormatPlugin {
 		return file;
 	}
 	public abstract void readMetaInfo(Book book) throws BookReadingException;
+	public abstract String readEncryptionType(Book book);
 	public abstract void readUids(Book book) throws BookReadingException;
 	public abstract void readModel(BookModel model) throws BookReadingException;
 	public abstract void detectLanguageAndEncoding(Book book) throws BookReadingException;
diff --git a/src/org/geometerplus/fbreader/formats/NativeFormatPlugin.java b/src/org/geometerplus/fbreader/formats/NativeFormatPlugin.java
index de778c9cc..a8902653c 100644
--- a/src/org/geometerplus/fbreader/formats/NativeFormatPlugin.java
+++ b/src/org/geometerplus/fbreader/formats/NativeFormatPlugin.java
@@ -60,6 +60,10 @@ public class NativeFormatPlugin extends FormatPlugin {
 
 	private native int readMetaInfoNative(Book book);
 
+	@Override
+	public native String readEncryptionType(Book book);
+
+	@Override
 	synchronized public void readUids(Book book) throws BookReadingException {
 		readUidsNative(book);
 		if (book.uids().isEmpty()) {
@@ -79,6 +83,7 @@ public class NativeFormatPlugin extends FormatPlugin {
 	@Override
 	synchronized public void readModel(BookModel model) throws BookReadingException {
 		final int code = readModelNative(model);
+		System.err.println("ENCRYPTION TYPE = " + readEncryptionType(model.Book));
 		if (code != 0) {
 			throw new BookReadingException(
 				"nativeCodeFailure",
diff --git a/src/org/geometerplus/fbreader/formats/fb2/FB2Plugin.java b/src/org/geometerplus/fbreader/formats/fb2/FB2Plugin.java
index f1f349837..fb45f3de3 100644
--- a/src/org/geometerplus/fbreader/formats/fb2/FB2Plugin.java
+++ b/src/org/geometerplus/fbreader/formats/fb2/FB2Plugin.java
@@ -47,6 +47,11 @@ public class FB2Plugin extends JavaFormatPlugin {
 		new FB2MetaInfoReader(book).readMetaInfo();
 	}
 
+	@Override
+	public String readEncryptionType(Book book) {
+		return EncryptionType.NONE;
+	}
+
 	@Override
 	public void readUids(Book book) throws BookReadingException {
 		// this method does nothing, we expect it will be never called
diff --git a/src/org/geometerplus/fbreader/formats/oeb/OEBPlugin.java b/src/org/geometerplus/fbreader/formats/oeb/OEBPlugin.java
index 46e6a0acd..f019d4ada 100644
--- a/src/org/geometerplus/fbreader/formats/oeb/OEBPlugin.java
+++ b/src/org/geometerplus/fbreader/formats/oeb/OEBPlugin.java
@@ -61,6 +61,11 @@ public class OEBPlugin extends JavaFormatPlugin {
 		new OEBMetaInfoReader(book).readMetaInfo(getOpfFile(book.File));
 	}
 
+	@Override
+	public String readEncryptionType(Book book) {
+		return EncryptionType.NONE;
+	}
+
 	@Override
 	public void readUids(Book book) throws BookReadingException {
 		// this method does nothing, we expect it will be never called
diff --git a/src/org/geometerplus/fbreader/formats/pdb/MobipocketPlugin.java b/src/org/geometerplus/fbreader/formats/pdb/MobipocketPlugin.java
index 880a2aa1d..db60c3857 100644
--- a/src/org/geometerplus/fbreader/formats/pdb/MobipocketPlugin.java
+++ b/src/org/geometerplus/fbreader/formats/pdb/MobipocketPlugin.java
@@ -123,6 +123,11 @@ public class MobipocketPlugin extends JavaFormatPlugin {
 		}
 	}
 
+	@Override
+	public String readEncryptionType(Book book) {
+		return EncryptionType.NONE;
+	}
+
 	@Override
 	public void readUids(Book book) throws BookReadingException {
 		if (book.uids().isEmpty()) {