diff --git a/README.md b/README.md
index 6a379af..5801b13 100644
--- a/README.md
+++ b/README.md
@@ -124,6 +124,18 @@ GenerateKey() ([]byte, error)
 GenerateIV() ([]byte, error)
     generate a 16 byte secure IV
 
+EncryptBytes(message []byte, key []byte) ([]byte, error)
+    encrypt a []byte using given key
+
+EncryptString(s string, key []byte) ([]byte, error)
+    return encrypted string using given key
+
+DecryptBytes(message []byte, key []byte) ([]byte, error)
+    decrypt []byte with given key
+
+DecryptString(s string, key []byte) (string, error)
+    return a decrypted string using given key
+
 RandomInt(min int, max int) (int, error)
     return a random int between min and max
 
@@ -266,6 +278,11 @@ GetCurrentProcArch() string
 ## Injection Functions
 
 ## Scanning Functions
+```
+IsHostUp(host string) (bool, error)
+    ping a given ip
+    returns true if host is up
+```
 
 ## Evasion Functions
 
diff --git a/encryption.go b/encryption.go
index bb9fb1d..4174572 100644
--- a/encryption.go
+++ b/encryption.go
@@ -71,17 +71,39 @@ func EncryptBytes(message []byte, key []byte) ([]byte, error) {
 }
 
 // return encrypted string using given key
-func EncryptString(s string, key []byte) (string, error) {
-	c, err := EncryptBytes([]byte(s), key)
+func EncryptString(s string, key []byte) ([]byte, error) {
+	return EncryptBytes([]byte(s), key)
+}
+
+// decrypt []byte with given key
+func DecryptBytes(message []byte, key []byte) ([]byte, error) {
+	iv := message[0:16]
+	cText := message[16:]
+
+	cipherBlock, err := aes.NewCipher(key)
 	if err != nil {
-		return "", err
+		return nil, err
 	}
 
-	return string(c), nil
+	c := cipher.NewCBCDecrypter(cipherBlock, iv)
+	d := make([]byte, len(cText))
+	c.CryptBlocks(d, cText)
+
+	lenBytes := d[0:4]
+	len := binary.LittleEndian.Uint32(lenBytes)
+	d = d[4:]
+	return d[:len], nil
 }
 
-// decrypt []byte with given key
-func Decrypt
+// return a decrypted string using given key
+func DecryptString(s string, key []byte) (string, error) {
+	d, err := DecryptBytes([]byte(s), key)
+	if err != nil {
+		return "", err
+	}
+
+	return string(d), nil
+}
 
 // return a random int between min and max
 func RandomInt(min int, max int) (int, error) {
diff --git a/scanning.go b/scanning.go
index 0639b74..714e38a 100644
--- a/scanning.go
+++ b/scanning.go
@@ -6,11 +6,11 @@ import (
 
 // ping a given ip
 // returns true if host is up
-func IsHostUp(ip string) (bool, error) {
+func IsHostUp(host string) (bool, error) {
 	var isUp bool
 
 	// new pinger
-	pinger, err := ping.NewPinger(ip)
+	pinger, err := ping.NewPinger(host)
 	if err != nil {
 		return false, err
 	}