diff --git a/sop-java/src/main/java/sop/Profile.java b/sop-java/src/main/java/sop/Profile.java
index 801f748..4a981f4 100644
--- a/sop-java/src/main/java/sop/Profile.java
+++ b/sop-java/src/main/java/sop/Profile.java
@@ -4,7 +4,7 @@
 
 package sop;
 
-import java.nio.charset.Charset;
+import sop.util.UTF8Util;
 
 /**
  * Tuple class bundling a profile name and description.
@@ -77,6 +77,6 @@ public class Profile {
      */
     private static boolean exceeds1000CharLineLimit(Profile profile) {
         String line = profile.toString();
-        return line.getBytes(Charset.forName("UTF8")).length > 1000;
+        return line.getBytes(UTF8Util.UTF8).length > 1000;
     }
 }
diff --git a/sop-java/src/main/java/sop/operation/AbstractSign.java b/sop-java/src/main/java/sop/operation/AbstractSign.java
index 3f9d6fc..508d741 100644
--- a/sop-java/src/main/java/sop/operation/AbstractSign.java
+++ b/sop-java/src/main/java/sop/operation/AbstractSign.java
@@ -5,11 +5,11 @@
 package sop.operation;
 
 import sop.exception.SOPGPException;
+import sop.util.UTF8Util;
 
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
-import java.nio.charset.Charset;
 
 public interface AbstractSign<T> {
 
@@ -67,7 +67,7 @@ public interface AbstractSign<T> {
     default T withKeyPassword(String password)
             throws SOPGPException.UnsupportedOption,
             SOPGPException.PasswordNotHumanReadable {
-        return withKeyPassword(password.getBytes(Charset.forName("UTF8")));
+        return withKeyPassword(password.getBytes(UTF8Util.UTF8));
     }
 
     /**
diff --git a/sop-java/src/main/java/sop/operation/Decrypt.java b/sop-java/src/main/java/sop/operation/Decrypt.java
index d695032..0123bbc 100644
--- a/sop-java/src/main/java/sop/operation/Decrypt.java
+++ b/sop-java/src/main/java/sop/operation/Decrypt.java
@@ -8,11 +8,11 @@ import sop.DecryptionResult;
 import sop.ReadyWithResult;
 import sop.SessionKey;
 import sop.exception.SOPGPException;
+import sop.util.UTF8Util;
 
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
-import java.nio.charset.Charset;
 import java.util.Date;
 
 public interface Decrypt {
@@ -138,7 +138,7 @@ public interface Decrypt {
     default Decrypt withKeyPassword(String password)
             throws SOPGPException.UnsupportedOption,
             SOPGPException.PasswordNotHumanReadable {
-        return withKeyPassword(password.getBytes(Charset.forName("UTF8")));
+        return withKeyPassword(password.getBytes(UTF8Util.UTF8));
     }
 
     /**
diff --git a/sop-java/src/main/java/sop/operation/Encrypt.java b/sop-java/src/main/java/sop/operation/Encrypt.java
index fed1210..b380d32 100644
--- a/sop-java/src/main/java/sop/operation/Encrypt.java
+++ b/sop-java/src/main/java/sop/operation/Encrypt.java
@@ -4,15 +4,15 @@
 
 package sop.operation;
 
-import java.io.ByteArrayInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.nio.charset.Charset;
-
 import sop.Profile;
 import sop.Ready;
 import sop.enums.EncryptAs;
 import sop.exception.SOPGPException;
+import sop.util.UTF8Util;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
 
 public interface Encrypt {
 
@@ -82,7 +82,7 @@ public interface Encrypt {
     default Encrypt withKeyPassword(String password)
             throws SOPGPException.PasswordNotHumanReadable,
             SOPGPException.UnsupportedOption {
-        return withKeyPassword(password.getBytes(Charset.forName("UTF8")));
+        return withKeyPassword(password.getBytes(UTF8Util.UTF8));
     }
 
     /**