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diff --git a/MdePkg/Include/Ppi/Security2.h b/MdePkg/Include/Ppi/Security2.h
deleted file mode 100644
index f7aabfca37..0000000000
--- a/MdePkg/Include/Ppi/Security2.h
+++ /dev/null
@@ -1,101 +0,0 @@
-/** @file
-  This file declares Pei Security2 PPI.
-
-  This PPI is installed by some platform PEIM that abstracts the security 
-  policy to the PEI Foundation, namely the case of a PEIM's authentication 
-  state being returned during the PEI section extraction process.
-
-  Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
-  This program and the accompanying materials                          
-  are licensed and made available under the terms and conditions of the BSD License         
-  which accompanies this distribution.  The full text of the license may be found at        
-  http://opensource.org/licenses/bsd-license.php                                            
-
-  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
-  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
-
-  @par Revision Reference:
-  This PPI is introduced in PI Version 1.0.
-
-**/
-
-#ifndef __SECURITY2_PPI_H__
-#define __SECURITY2_PPI_H__
-
-#define EFI_PEI_SECURITY2_PPI_GUID \
-  { 0xdcd0be23, 0x9586, 0x40f4, { 0xb6, 0x43, 0x6, 0x52, 0x2c, 0xed, 0x4e, 0xde } }
-
-
-typedef struct _EFI_PEI_SECURITY2_PPI  EFI_PEI_SECURITY2_PPI;
-
-/**
-  Allows the platform builder to implement a security policy 
-  in response to varying file authentication states.
-
-  This service is published by some platform PEIM. The purpose of
-  this service is to expose a given platform's policy-based
-  response to the PEI Foundation. For example, if there is a PEIM
-  in a GUIDed encapsulation section and the extraction of the PEI
-  file section yields an authentication failure, there is no a
-  priori policy in the PEI Foundation. Specifically, this
-  situation leads to the question whether PEIMs that are either
-  not in GUIDed sections or are in sections whose authentication
-  fails should still be executed.
-
-  @param PeiServices             An indirect pointer to the PEI Services
-                                 Table published by the PEI Foundation.
-  @param This                    Interface pointer that implements the
-                                 particular EFI_PEI_SECURITY2_PPI instance.
-  @param AuthenticationStatus    Authentication status of the file.
-                                 xx00 Image was not signed.
-                                 xxx1 Platform security policy override. 
-                                      Assumes same meaning as 0010 (the image was signed, the
-                                      signature was tested, and the signature passed authentication test).
-                                 0010 Image was signed, the signature was tested, 
-                                      and the signature passed authentication test.
-                                 0110 Image was signed and the signature was not tested.
-                                 1010 Image was signed, the signature was tested, 
-                                      and the signature failed the authentication test.
-  @param FvHandle                Handle of the volume in which the file
-                                 resides. This allows different policies
-                                 depending on different firmware volumes.
-  @param FileHandle              Handle of the file under review.
-  @param DeferExecution          Pointer to a variable that alerts the
-                                 PEI Foundation to defer execution of a
-                                 PEIM.
-
-  @retval EFI_SUCCESS            The service performed its action successfully.
-  @retval EFI_SECURITY_VIOLATION The object cannot be trusted.
-
-**/
-typedef
-EFI_STATUS
-(EFIAPI *EFI_PEI_SECURITY_AUTHENTICATION_STATE)(
-  IN CONST  EFI_PEI_SERVICES      **PeiServices,
-  IN CONST  EFI_PEI_SECURITY2_PPI *This,
-  IN UINT32                       AuthenticationStatus,
-  IN EFI_PEI_FV_HANDLE            FvHandle,
-  IN EFI_PEI_FILE_HANDLE          FileHandle,
-  IN OUT    BOOLEAN               *DeferExecution
-);
-
-///
-/// This PPI is a means by which the platform builder can indicate
-/// a response to a PEIM's authentication state. This can be in
-/// the form of a requirement for the PEI Foundation to skip a
-/// module using the DeferExecution Boolean output in the
-/// AuthenticationState() member function. Alternately, the
-/// Security PPI can invoke something like a cryptographic PPI
-/// that hashes the PEIM contents to log attestations, for which
-/// the FileHandle parameter in AuthenticationState() will be
-/// useful. If this PPI does not exist, PEIMs will be considered
-/// trusted.
-///
-struct _EFI_PEI_SECURITY2_PPI {
-  EFI_PEI_SECURITY_AUTHENTICATION_STATE   AuthenticationState;
-};
-
-
-extern EFI_GUID gEfiPeiSecurity2PpiGuid;
-
-#endif