diff --git a/src/test/java/com/mattrixwv/CipherStreamJava/monoSubstitution/TestPorta.java b/src/test/java/com/mattrixwv/CipherStreamJava/monoSubstitution/TestPorta.java
new file mode 100644
index 0000000..97754d5
--- /dev/null
+++ b/src/test/java/com/mattrixwv/CipherStreamJava/monoSubstitution/TestPorta.java
@@ -0,0 +1,407 @@
+//CipherStreamJava/src/test/java/com/mattrixwv/CipherStreamJava/monoSubstitution/TestPorta.java
+//Mattrixwv
+// Created: 02-28-22
+//Modified: 02-28-22
+package com.mattrixwv.CipherStreamJava.monoSubstitution;
+
+
+import static org.junit.Assert.assertEquals;
+
+import com.mattrixwv.CipherStreamJava.exceptions.InvalidInputException;
+import com.mattrixwv.CipherStreamJava.exceptions.InvalidKeywordException;
+
+import org.junit.Test;
+
+
+public class TestPorta{
+	@Test
+	public void testEncode() throws InvalidKeywordException, InvalidInputException{
+		Porta cipher = new Porta(true, true, true);
+
+		//Test lowercase encoding
+		String inputString = "messagetoencode";
+		String keyword = "keyword";
+		String correctOutput = "rtghuosbmqcwgrw";
+		String output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed lowercase encoding.", correctOutput, output);
+		//Test uppercase encoding
+		inputString = "MESSAGETOENCODE";
+		keyword = "keyword";
+		correctOutput = "RTGHUOSBMQCWGRW";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed uppercase encoding.", correctOutput, output);
+
+		//Test whitespace encoding
+		inputString = "message to encode";
+		keyword = "keyword";
+		correctOutput = "rtghuos bm qcwgrw";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed whitespace encoding.", correctOutput, output);
+
+		//Test symbol encoding
+		inputString = "message*to+encode";
+		keyword = "keyword";
+		correctOutput = "rtghuos*bm+qcwgrw";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed symbol encoding.", correctOutput, output);
+
+		//Test mixed case, whitespace, symbol encoding
+		inputString = "Message to^encode";
+		keyword = "keyword";
+		correctOutput = "Rtghuos bm^qcwgrw";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed mixed case, whitespace, symbol encoding.", correctOutput, output);
+	}
+
+	@Test
+	public void testNoCapitalEncode() throws InvalidKeywordException, InvalidInputException{
+		Porta cipher = new Porta(false, true, true);
+
+		//Test lowercase encoding
+		String inputString = "messagetoencode";
+		String keyword = "keyword";
+		String correctOutput = "RTGHUOSBMQCWGRW";
+		String output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed no capital lowercase encoding.", correctOutput, output);
+		//Test uppercase encoding
+		inputString = "MESSAGETOENCODE";
+		keyword = "keyword";
+		correctOutput = "RTGHUOSBMQCWGRW";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed no capital uppercase encoding.", correctOutput, output);
+
+		//Test whitespace encoding
+		inputString = "message to encode";
+		keyword = "keyword";
+		correctOutput = "RTGHUOS BM QCWGRW";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed no capital whitespace encoding.", correctOutput, output);
+
+		//Test symbol encoding
+		inputString = "message*to+encode";
+		keyword = "keyword";
+		correctOutput = "RTGHUOS*BM+QCWGRW";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed no capital symbol encoding.", correctOutput, output);
+
+		//Test mixed case, whitespace, symbol encoding
+		inputString = "Message to^encode";
+		keyword = "keyword";
+		correctOutput = "RTGHUOS BM^QCWGRW";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed no capital mixed case, whitespace, symbol encoding.", correctOutput, output);
+	}
+
+	@Test
+	public void testNoWhitespaceEncode() throws InvalidKeywordException, InvalidInputException{
+		Porta cipher = new Porta(true, false, true);
+
+		//Test lowercase encoding
+		String inputString = "messagetoencode";
+		String keyword = "keyword";
+		String correctOutput = "rtghuosbmqcwgrw";
+		String output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed no whitespace lowercase encoding.", correctOutput, output);
+		//Test uppercase encoding
+		inputString = "MESSAGETOENCODE";
+		keyword = "keyword";
+		correctOutput = "RTGHUOSBMQCWGRW";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed no whitespace uppercase encoding.", correctOutput, output);
+
+		//Test whitespace encoding
+		inputString = "message to encode";
+		keyword = "keyword";
+		correctOutput = "rtghuosbmqcwgrw";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed no whitespace whitespace encoding.", correctOutput, output);
+
+		//Test symbol encoding
+		inputString = "message*to+encode";
+		keyword = "keyword";
+		correctOutput = "rtghuos*bm+qcwgrw";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed no whitespace symbol encoding.", correctOutput, output);
+
+		//Test mixed case, whitespace, symbol encoding
+		inputString = "Message to^encode";
+		keyword = "keyword";
+		correctOutput = "Rtghuosbm^qcwgrw";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed no whitespace mixed case, whitespace, symbol encoding.", correctOutput, output);
+	}
+
+	@Test
+	public void testNoSymbolEncoding() throws InvalidKeywordException, InvalidInputException{
+		Porta cipher = new Porta(true, true, false);
+
+		//Test lowercase encoding
+		String inputString = "messagetoencode";
+		String keyword = "keyword";
+		String correctOutput = "rtghuosbmqcwgrw";
+		String output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed no symbol lowercase encoding.", correctOutput, output);
+		//Test uppercase encoding
+		inputString = "MESSAGETOENCODE";
+		keyword = "keyword";
+		correctOutput = "RTGHUOSBMQCWGRW";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed no symbol uppercase encoding.", correctOutput, output);
+
+		//Test whitespace encoding
+		inputString = "message to encode";
+		keyword = "keyword";
+		correctOutput = "rtghuos bm qcwgrw";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed no symbol whitespace encoding.", correctOutput, output);
+
+		//Test symbol encoding
+		inputString = "message*to+encode";
+		keyword = "keyword";
+		correctOutput = "rtghuosbmqcwgrw";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed no symbol symbol encoding.", correctOutput, output);
+
+		//Test mixed case, whitespace, symbol encoding
+		inputString = "Message to^encode";
+		keyword = "keyword";
+		correctOutput = "Rtghuos bmqcwgrw";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed no symbol mixed case, whitespace, symbol encoding.", correctOutput, output);
+	}
+
+	@Test
+	public void testNoCapitalWhitespaceSymbolEncode() throws InvalidKeywordException, InvalidInputException{
+		Porta cipher = new Porta(false, false, false);
+
+		//Test lowercase encoding
+		String inputString = "messagetoencode";
+		String keyword = "keyword";
+		String correctOutput = "RTGHUOSBMQCWGRW";
+		String output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed secure lowercase encoding.", correctOutput, output);
+		//Test uppercase encoding
+		inputString = "MESSAGETOENCODE";
+		keyword = "keyword";
+		correctOutput = "RTGHUOSBMQCWGRW";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed secure uppercase encoding.", correctOutput, output);
+
+		//Test whitespace encoding
+		inputString = "message to encode";
+		keyword = "keyword";
+		correctOutput = "RTGHUOSBMQCWGRW";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed secure whitespace encoding.", correctOutput, output);
+
+		//Test symbol encoding
+		inputString = "message*to+encode";
+		keyword = "keyword";
+		correctOutput = "RTGHUOSBMQCWGRW";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed secure symbol encoding.", correctOutput, output);
+
+		//Test mixed case, whitespace, symbol encoding
+		inputString = "Message to^encode";
+		keyword = "keyword";
+		correctOutput = "RTGHUOSBMQCWGRW";
+		output = cipher.encode(keyword, inputString);
+		assertEquals("Porta failed secure mixed case, whitespace, symbol encoding.", correctOutput, output);
+	}
+
+
+	@Test
+	public void testDecode() throws InvalidKeywordException, InvalidInputException{
+		Porta cipher = new Porta(true, true, true);
+
+		//Test lowercase decoding
+		String inputString = "rtghuosbmqcwgrw";
+		String keyword = "keyword";
+		String correctOutput = "messagetoencode";
+		String output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed lowercase decoding.", correctOutput, output);
+		//Test uppercase decoding
+		inputString = "RTGHUOSBMQCWGRW";
+		keyword = "keyword";
+		correctOutput = "MESSAGETOENCODE";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed uppercase decoding.", correctOutput, output);
+
+		//Test whitespace decoding
+		inputString = "rtghuos bm qcwgrw";
+		keyword = "keyword";
+		correctOutput = "message to encode";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed whitespace decoding.", correctOutput, output);
+
+		//Test symbol decoding
+		inputString = "rtghuos*bm+qcwgrw";
+		keyword = "keyword";
+		correctOutput = "message*to+encode";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed symbol decoding.", correctOutput, output);
+
+		//Test mixed case, whitespace, symbol decoding
+		inputString = "Rtghuos bm^qcwgrw";
+		keyword = "keyword";
+		correctOutput = "Message to^encode";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed mixed case, whitespace, symbol decoding.", correctOutput, output);
+	}
+
+	@Test
+	public void testNoCapitalDecode() throws InvalidKeywordException, InvalidInputException{
+		Porta cipher = new Porta(false, true, true);
+
+		//Test lowercase decoding
+		String inputString = "rtghuosbmqcwgrw";
+		String keyword = "keyword";
+		String correctOutput = "MESSAGETOENCODE";
+		String output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed no capital lowercase decoding.", correctOutput, output);
+		//Test uppercase decoding
+		inputString = "RTGHUOSBMQCWGRW";
+		keyword = "keyword";
+		correctOutput = "MESSAGETOENCODE";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed no capital uppercase decoding.", correctOutput, output);
+
+		//Test whitespace decoding
+		inputString = "rtghuos bm qcwgrw";
+		keyword = "keyword";
+		correctOutput = "MESSAGE TO ENCODE";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed no capital whitespace decoding.", correctOutput, output);
+
+		//Test symbol decoding
+		inputString = "rtghuos*bm+qcwgrw";
+		keyword = "keyword";
+		correctOutput = "MESSAGE*TO+ENCODE";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed no capital symbol decoding.", correctOutput, output);
+
+		//Test mixed case, whitespace, symbol decoding
+		inputString = "Rtghuos bm^qcwgrw";
+		keyword = "keyword";
+		correctOutput = "MESSAGE TO^ENCODE";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed no capital mixed case, whitespace, symbol decoding.", correctOutput, output);
+	}
+
+	@Test
+	public void testNoWhitespaceDecode() throws InvalidKeywordException, InvalidInputException{
+		Porta cipher = new Porta(true, false, true);
+
+		//Test lowercase decoding
+		String inputString = "rtghuosbmqcwgrw";
+		String keyword = "keyword";
+		String correctOutput = "messagetoencode";
+		String output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed no whitespace lowercase decoding.", correctOutput, output);
+		//Test uppercase decoding
+		inputString = "RTGHUOSBMQCWGRW";
+		keyword = "keyword";
+		correctOutput = "MESSAGETOENCODE";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed no whitespace uppercase decoding.", correctOutput, output);
+
+		//Test whitespace decoding
+		inputString = "rtghuos bm qcwgrw";
+		keyword = "keyword";
+		correctOutput = "messagetoencode";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed no whitespace whitespace decoding.", correctOutput, output);
+
+		//Test symbol decoding
+		inputString = "rtghuos*bm+qcwgrw";
+		keyword = "keyword";
+		correctOutput = "message*to+encode";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed no whitespace symbol decoding.", correctOutput, output);
+
+		//Test mixed case, whitespace, symbol decoding
+		inputString = "Rtghuos bm^qcwgrw";
+		keyword = "keyword";
+		correctOutput = "Messageto^encode";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed no whitespace mixed case, whitespace, symbol decoding.", correctOutput, output);
+	}
+
+	@Test
+	public void testNoSymbolDeocde() throws InvalidKeywordException, InvalidInputException{
+		Porta cipher = new Porta(true, true, false);
+
+		//Test lowercase decoding
+		String inputString = "rtghuosbmqcwgrw";
+		String keyword = "keyword";
+		String correctOutput = "messagetoencode";
+		String output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed lowercase decoding.", correctOutput, output);
+		//Test uppercase decoding
+		inputString = "RTGHUOSBMQCWGRW";
+		keyword = "keyword";
+		correctOutput = "MESSAGETOENCODE";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed uppercase decoding.", correctOutput, output);
+
+		//Test whitespace decoding
+		inputString = "rtghuos bm qcwgrw";
+		keyword = "keyword";
+		correctOutput = "message to encode";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed whitespace decoding.", correctOutput, output);
+
+		//Test symbol decoding
+		inputString = "rtghuos*bm+qcwgrw";
+		keyword = "keyword";
+		correctOutput = "messagetoencode";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed symbol decoding.", correctOutput, output);
+
+		//Test mixed case, whitespace, symbol decoding
+		inputString = "Rtghuos bm^qcwgrw";
+		keyword = "keyword";
+		correctOutput = "Message toencode";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed mixed case, whitespace, symbol decoding.", correctOutput, output);
+	}
+
+	@Test
+	public void testNoCapitalWhitespaceSymbolDecode() throws InvalidKeywordException, InvalidInputException{
+		Porta cipher = new Porta(false, false, false);
+
+		//Test lowercase decoding
+		String inputString = "rtghuosbmqcwgrw";
+		String keyword = "keyword";
+		String correctOutput = "MESSAGETOENCODE";
+		String output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed secure lowercase decoding.", correctOutput, output);
+		//Test uppercase decoding
+		inputString = "RTGHUOSBMQCWGRW";
+		keyword = "keyword";
+		correctOutput = "MESSAGETOENCODE";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed secure uppercase decoding.", correctOutput, output);
+
+		//Test whitespace decoding
+		inputString = "rtghuos bm qcwgrw";
+		keyword = "keyword";
+		correctOutput = "MESSAGETOENCODE";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed secure whitespace decoding.", correctOutput, output);
+
+		//Test symbol decoding
+		inputString = "rtghuos*bm+qcwgrw";
+		keyword = "keyword";
+		correctOutput = "MESSAGETOENCODE";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed secure symbol decoding.", correctOutput, output);
+
+		//Test mixed case, whitespace, symbol decoding
+		inputString = "Rtghuos bm^qcwgrw";
+		keyword = "keyword";
+		correctOutput = "MESSAGETOENCODE";
+		output = cipher.decode(keyword, inputString);
+		assertEquals("Porta failed secure mixed case, whitespace, symbol decoding.", correctOutput, output);
+	}
+}