diff --git a/pgpainless-core/src/main/java/org/pgpainless/implementation/BcImplementationFactory.java b/pgpainless-core/src/main/java/org/pgpainless/implementation/BcImplementationFactory.java
index 418c9628..bd358061 100644
--- a/pgpainless-core/src/main/java/org/pgpainless/implementation/BcImplementationFactory.java
+++ b/pgpainless-core/src/main/java/org/pgpainless/implementation/BcImplementationFactory.java
@@ -139,11 +139,6 @@ public class BcImplementationFactory extends ImplementationFactory {
         return new BcPGPKeyPair(algorithm.getAlgorithmId(), jceToBcKeyPair(algorithm, keyPair, creationDate), creationDate);
     }
 
-    @Override
-    public PGPKeyPair getPGPKeyPair(PublicKeyAlgorithm algorithm, AsymmetricCipherKeyPair keyPair, Date creationDate) throws PGPException {
-        return new BcPGPKeyPair(algorithm.getAlgorithmId(), keyPair, creationDate);
-    }
-
     @Override
     public PBESecretKeyEncryptor getPBESecretKeyEncryptor(SymmetricKeyAlgorithm encryptionAlgorithm, HashAlgorithm hashAlgorithm, int s2kCount, Passphrase passphrase) throws PGPException {
         return new BcPBESecretKeyEncryptorBuilder(
diff --git a/pgpainless-core/src/main/java/org/pgpainless/implementation/ImplementationFactory.java b/pgpainless-core/src/main/java/org/pgpainless/implementation/ImplementationFactory.java
index 4e5bd7d5..d7ee5370 100644
--- a/pgpainless-core/src/main/java/org/pgpainless/implementation/ImplementationFactory.java
+++ b/pgpainless-core/src/main/java/org/pgpainless/implementation/ImplementationFactory.java
@@ -15,13 +15,9 @@
  */
 package org.pgpainless.implementation;
 
-import java.io.IOException;
 import java.security.KeyPair;
-import java.security.NoSuchAlgorithmException;
-import java.security.spec.InvalidKeySpecException;
 import java.util.Date;
 
-import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
 import org.bouncycastle.openpgp.PGPException;
 import org.bouncycastle.openpgp.PGPKeyPair;
 import org.bouncycastle.openpgp.PGPPrivateKey;
@@ -112,9 +108,6 @@ public abstract class ImplementationFactory {
 
     public abstract PGPKeyPair getPGPKeyPair(PublicKeyAlgorithm algorithm, KeyPair keyPair, Date creationDate) throws PGPException;
 
-    public abstract PGPKeyPair getPGPKeyPair(PublicKeyAlgorithm algorithm, AsymmetricCipherKeyPair keyPair, Date creationDate)
-            throws PGPException, NoSuchAlgorithmException, IOException, InvalidKeySpecException;
-
     public abstract PBESecretKeyEncryptor getPBESecretKeyEncryptor(SymmetricKeyAlgorithm encryptionAlgorithm,
                                                                    HashAlgorithm hashAlgorithm, int s2kCount,
                                                                    Passphrase passphrase) throws PGPException;
diff --git a/pgpainless-core/src/main/java/org/pgpainless/implementation/JceImplementationFactory.java b/pgpainless-core/src/main/java/org/pgpainless/implementation/JceImplementationFactory.java
index f1f8be0a..c7e311b3 100644
--- a/pgpainless-core/src/main/java/org/pgpainless/implementation/JceImplementationFactory.java
+++ b/pgpainless-core/src/main/java/org/pgpainless/implementation/JceImplementationFactory.java
@@ -15,18 +15,9 @@
  */
 package org.pgpainless.implementation;
 
-import java.io.IOException;
-import java.security.KeyFactory;
 import java.security.KeyPair;
-import java.security.NoSuchAlgorithmException;
-import java.security.spec.InvalidKeySpecException;
-import java.security.spec.PKCS8EncodedKeySpec;
-import java.security.spec.X509EncodedKeySpec;
 import java.util.Date;
 
-import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
-import org.bouncycastle.crypto.util.PrivateKeyInfoFactory;
-import org.bouncycastle.crypto.util.SubjectPublicKeyInfoFactory;
 import org.bouncycastle.openpgp.PGPException;
 import org.bouncycastle.openpgp.PGPKeyPair;
 import org.bouncycastle.openpgp.PGPPrivateKey;
@@ -136,10 +127,6 @@ public class JceImplementationFactory extends ImplementationFactory {
         return new JcaPGPKeyPair(algorithm.getAlgorithmId(), keyPair, creationDate);
     }
 
-    public PGPKeyPair getPGPKeyPair(PublicKeyAlgorithm algorithm, AsymmetricCipherKeyPair keyPair, Date creationDate) throws PGPException, NoSuchAlgorithmException, IOException, InvalidKeySpecException {
-        return new JcaPGPKeyPair(algorithm.getAlgorithmId(), bcToJceKeyPair(keyPair), creationDate);
-    }
-
     public PBESecretKeyEncryptor getPBESecretKeyEncryptor(SymmetricKeyAlgorithm encryptionAlgorithm, HashAlgorithm hashAlgorithm, int s2kCount, Passphrase passphrase) throws PGPException {
         return new JcePBESecretKeyEncryptorBuilder(
                 encryptionAlgorithm.getAlgorithmId(),
@@ -148,14 +135,4 @@ public class JceImplementationFactory extends ImplementationFactory {
                 .setProvider(ProviderFactory.getProvider())
                 .build(passphrase.getChars());
     }
-
-    private KeyPair bcToJceKeyPair(AsymmetricCipherKeyPair keyPair)
-            throws NoSuchAlgorithmException, InvalidKeySpecException, IOException {
-        byte[] pkcs8Encoded = PrivateKeyInfoFactory.createPrivateKeyInfo(keyPair.getPrivate()).getEncoded();
-        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(pkcs8Encoded);
-        byte[] spkiEncoded = SubjectPublicKeyInfoFactory.createSubjectPublicKeyInfo(keyPair.getPublic()).getEncoded();
-        X509EncodedKeySpec spkiKeySpec = new X509EncodedKeySpec(spkiEncoded);
-        KeyFactory keyFac = KeyFactory.getInstance("RSA");
-        return new KeyPair(keyFac.generatePublic(spkiKeySpec), keyFac.generatePrivate(pkcs8KeySpec));
-    }
 }