diff --git a/openapi_core/security/providers.py b/openapi_core/security/providers.py
index 9e89fc3..5ee27c5 100644
--- a/openapi_core/security/providers.py
+++ b/openapi_core/security/providers.py
@@ -1,8 +1,6 @@
-import binascii
 import warnings
 
 from openapi_core.security.exceptions import SecurityError
-from openapi_core.security.util import b64decode
 
 
 class BaseProvider(object):
@@ -40,7 +38,5 @@ class HttpProvider(BaseProvider):
         if auth_type.lower() != self.scheme.scheme.value:
             raise SecurityError(
                 'Unknown authorization method %s' % auth_type)
-        try:
-            return b64decode(encoded_credentials).decode('latin1')
-        except binascii.Error:
-            raise SecurityError('Invalid base64 encoding.')
+
+        return encoded_credentials
diff --git a/openapi_core/security/util.py b/openapi_core/security/util.py
deleted file mode 100644
index ff05ca1..0000000
--- a/openapi_core/security/util.py
+++ /dev/null
@@ -1,9 +0,0 @@
-from base64 import urlsafe_b64decode
-
-
-def b64decode(s):
-    # Code from
-    # https://github.com/GehirnInc/python-jwt/blob/master/jwt/utils.py#L29
-    s_bin = s.encode('ascii')
-    s_bin += b'=' * (4 - len(s_bin) % 4)
-    return urlsafe_b64decode(s_bin)
diff --git a/tests/integration/validation/test_validators.py b/tests/integration/validation/test_validators.py
index 07dddd5..e244dfc 100644
--- a/tests/integration/validation/test_validators.py
+++ b/tests/integration/validation/test_validators.py
@@ -283,7 +283,7 @@ class TestRequestValidator(object):
             },
         )
         assert result.security == {
-            'petstore_auth': self.api_key,
+            'petstore_auth': self.api_key_encoded,
         }
 
 
diff --git a/tests/unit/security/test_providers.py b/tests/unit/security/test_providers.py
index d79e592..e53798f 100644
--- a/tests/unit/security/test_providers.py
+++ b/tests/unit/security/test_providers.py
@@ -30,4 +30,4 @@ class TestHttpProvider(object):
 
         result = provider(request)
 
-        assert result == '1'
+        assert result == jwt