diff --git a/sdk/xtdk/setypes.h b/sdk/xtdk/setypes.h
index 96b3ec0..58e240f 100644
--- a/sdk/xtdk/setypes.h
+++ b/sdk/xtdk/setypes.h
@@ -54,6 +54,11 @@
 /* Default security quota */
 #define SE_DEFAULT_SECURITY_QUOTA                               2048
 
+#define SE_INITIAL_PRIVILEGE_COUNT                              3
+
+/* Token source length */
+#define SE_TOKEN_SOURCE_LENGTH                                  8
+
 /* C/C++ specific code */
 #ifndef __XTOS_ASSEMBLER__
 
@@ -66,6 +71,15 @@ typedef enum _SECURITY_IMPERSONATION_LEVEL
     SecurityDelegation
 } SECURITY_IMPERSONATION_LEVEL, *PSECURITY_IMPERSONATION_LEVEL;
 
+/* Security operation codes */
+typedef enum _SECURITY_OPERATION_CODE
+{
+    SetSecurityDescriptor,
+    QuerySecurityDescriptor,
+    DeleteSecurityDescriptor,
+    AssignSecurityDescriptor
+} SECURITY_OPERATION_CODE, *PSECURITY_OPERATION_CODE;
+
 /* Generic security mapping structure definition */
 typedef struct _GENERIC_MAPPING
 {
@@ -75,6 +89,45 @@ typedef struct _GENERIC_MAPPING
     ULONG GenericAll;
 } GENERIC_MAPPING, *PGENERIC_MAPPING;
 
+/* LUID and attributes structure definition */
+typedef struct _LUID_AND_ATTRIBUTES
+{
+    LUID Luid;
+    ULONG Attributes;
+} LUID_AND_ATTRIBUTES, *PLUID_AND_ATTRIBUTES;
+
+/* Initial privilege set structure definition */
+typedef struct _INITIAL_PRIVILEGE_SET
+{
+    ULONG PrivilegeCount;
+    ULONG Control;
+    LUID_AND_ATTRIBUTES Privilege[SE_INITIAL_PRIVILEGE_COUNT];
+} INITIAL_PRIVILEGE_SET, * PINITIAL_PRIVILEGE_SET;
+
+/* Privilege set structure definition */
+typedef struct _PRIVILEGE_SET
+{
+    ULONG PrivilegeCount;
+    ULONG Control;
+    LUID_AND_ATTRIBUTES Privilege[1];
+} PRIVILEGE_SET, *PPRIVILEGE_SET;
+
+/* Token source structure definition */
+typedef struct _TOKEN_SOURCE
+{
+    CHAR SourceName[SE_TOKEN_SOURCE_LENGTH];
+    LUID SourceIdentifier;
+} TOKEN_SOURCE, *PTOKEN_SOURCE;
+
+/* Token control structure definition */
+typedef struct _TOKEN_CONTROL
+{
+    LUID TokenId;
+    LUID AuthenticationId;
+    LUID ModifiedId;
+    TOKEN_SOURCE TokenSource;
+} TOKEN_CONTROL, *PTOKEN_CONTROL;
+
 /* Security quality of service structure definition */
 typedef struct _SECURITY_QUALITY_OF_SERVICE
 {
@@ -84,5 +137,50 @@ typedef struct _SECURITY_QUALITY_OF_SERVICE
     BOOLEAN EffectiveOnly;
 } SECURITY_QUALITY_OF_SERVICE, *PSECURITY_QUALITY_OF_SERVICE;
 
+/* Security client context structure definition */
+typedef struct _SECURITY_CLIENT_CONTEXT
+{
+    SECURITY_QUALITY_OF_SERVICE SecurityQos;
+    PACCESS_TOKEN ClientToken;
+    BOOLEAN DirectlyAccessClientToken;
+    BOOLEAN DirectAccessEffectiveOnly;
+    BOOLEAN ServerIsRemote;
+    TOKEN_CONTROL ClientTokenControl;
+} SECURITY_CLIENT_CONTEXT, *PSECURITY_CLIENT_CONTEXT;
+
+/* Security subject context structure definition */
+typedef struct _SECURITY_SUBJECT_CONTEXT
+{
+    PACCESS_TOKEN ClientToken;
+    SECURITY_IMPERSONATION_LEVEL ImpersonationLevel;
+    PACCESS_TOKEN PrimaryToken;
+    PVOID ProcessAuditId;
+} SECURITY_SUBJECT_CONTEXT, *PSECURITY_SUBJECT_CONTEXT;
+
+/* Access state structure definition */
+typedef struct _ACCESS_STATE
+{
+    LUID OperationID;
+    BOOLEAN SecurityEvaluated;
+    BOOLEAN GenerateAudit;
+    BOOLEAN GenerateOnClose;
+    BOOLEAN PrivilegesAllocated;
+    ULONG Flags;
+    ACCESS_MASK RemainingDesiredAccess;
+    ACCESS_MASK PreviouslyGrantedAccess;
+    ACCESS_MASK OriginalDesiredAccess;
+    SECURITY_SUBJECT_CONTEXT SubjectSecurityContext;
+    PSECURITY_DESCRIPTOR SecurityDescriptor;
+    PVOID AuxData;
+    union
+    {
+        INITIAL_PRIVILEGE_SET InitialPrivilegeSet;
+        PRIVILEGE_SET PrivilegeSet;
+    } Privileges;
+    BOOLEAN AuditPrivileges;
+    UNICODE_STRING ObjectName;
+    UNICODE_STRING ObjectTypeName;
+} ACCESS_STATE, *PACCESS_STATE;
+
 #endif /* __XTOS_ASSEMBLER__ */
 #endif /* __XTDK_SETYPES_H */
diff --git a/sdk/xtdk/xtstruct.h b/sdk/xtdk/xtstruct.h
index d1375b7..2acf11f 100644
--- a/sdk/xtdk/xtstruct.h
+++ b/sdk/xtdk/xtstruct.h
@@ -62,11 +62,13 @@ typedef enum _MODE MODE, *PMODE;
 typedef enum _RTL_BALANCED_NODE_COLOR RTL_BALANCED_NODE_COLOR, *PRTL_BALANCED_NODE_COLOR;
 typedef enum _RTL_VARIABLE_TYPE RTL_VARIABLE_TYPE, *PRTL_VARIABLE_TYPE;
 typedef enum _SECURITY_IMPERSONATION_LEVEL SECURITY_IMPERSONATION_LEVEL, *PSECURITY_IMPERSONATION_LEVEL;
+typedef enum _SECURITY_OPERATION_CODE SECURITY_OPERATION_CODE, *PSECURITY_OPERATION_CODE;
 typedef enum _SYSTEM_FIRMWARE_TYPE SYSTEM_FIRMWARE_TYPE, *PSYSTEM_FIRMWARE_TYPE;
 typedef enum _SYSTEM_RESOURCE_TYPE SYSTEM_RESOURCE_TYPE, *PSYSTEM_RESOURCE_TYPE;
 typedef enum _WAIT_TYPE WAIT_TYPE, *PWAIT_TYPE;
 
 /* Structures forward references */
+typedef struct _ACCESS_STATE ACCESS_STATE, *PACCESS_STATE;
 typedef struct _ACPI_CACHE_LIST ACPI_CACHE_LIST, *PACPI_CACHE_LIST;
 typedef struct _ACPI_DESCRIPTION_HEADER ACPI_DESCRIPTION_HEADER, *PACPI_DESCRIPTION_HEADER;
 typedef struct _ACPI_FADT ACPI_FADT, *PACPI_FADT;
@@ -256,6 +258,7 @@ typedef struct _GENERIC_MAPPING GENERIC_MAPPING, *PGENERIC_MAPPING;
 typedef struct _GUID GUID, *PGUID;
 typedef struct _HL_FRAMEBUFFER_DATA HL_FRAMEBUFFER_DATA, *PHL_FRAMEBUFFER_DATA;
 typedef struct _HL_SCROLL_REGION_DATA HL_SCROLL_REGION_DATA, *PHL_SCROLL_REGION_DATA;
+typedef struct _INITIAL_PRIVILEGE_SET INITIAL_PRIVILEGE_SET, *PINITIAL_PRIVILEGE_SET;
 typedef struct _KAFFINITY_MAP KAFFINITY_MAP, *PKAFFINITY_MAP;
 typedef struct _KAPC KAPC, *PKAPC;
 typedef struct _KAPC_STATE KAPC_STATE, *PKAPC_STATE;
@@ -298,6 +301,7 @@ typedef struct _LOADER_MEMORY_DESCRIPTOR LOADER_MEMORY_DESCRIPTOR, *PLOADER_MEMO
 typedef struct _LOOKASIDE_LIST LOOKASIDE_LIST, *PLOOKASIDE_LIST;
 typedef struct _LOOKASIDE_LIST_EX LOOKASIDE_LIST_EX, *PLOOKASIDE_LIST_EX;
 typedef struct _LUID LUID, *PLUID;
+typedef struct _LUID_AND_ATTRIBUTES LUID_AND_ATTRIBUTES, *PLUID_AND_ATTRIBUTES;
 typedef struct _M128 M128, *PM128;
 typedef struct _MMCOLOR_TABLES MMCOLOR_TABLES, *PMMCOLOR_TABLES;
 typedef struct _MMFREE_POOL_ENTRY MMFREE_POOL_ENTRY, *PMMFREE_POOL_ENTRY;
@@ -341,6 +345,7 @@ typedef struct _PHYSICAL_MEMORY_RUN PHYSICAL_MEMORY_RUN, *PPHYSICAL_MEMORY_RUN;
 typedef struct _POOL_HEADER POOL_HEADER, *PPOOL_HEADER;
 typedef struct _POOL_TRACKING_BIG_ALLOCATIONS POOL_TRACKING_BIG_ALLOCATIONS, *PPOOL_TRACKING_BIG_ALLOCATIONS;
 typedef struct _POOL_TRACKING_TABLE POOL_TRACKING_TABLE, *PPOOL_TRACKING_TABLE;
+typedef struct _PRIVILEGE_SET PRIVILEGE_SET, *PPRIVILEGE_SET;
 typedef struct _PROCESSOR_IDENTITY PROCESSOR_IDENTITY, *PPROCESSOR_IDENTITY;
 typedef struct _PROCESSOR_POWER_STATE PROCESSOR_POWER_STATE, *PPROCESSOR_POWER_STATE;
 typedef struct _QUAD QUAD, *PQUAD;
@@ -349,7 +354,9 @@ typedef struct _RTL_BITMAP RTL_BITMAP, *PRTL_BITMAP;
 typedef struct _RTL_PRINT_CONTEXT RTL_PRINT_CONTEXT, *PRTL_PRINT_CONTEXT;
 typedef struct _RTL_PRINT_FORMAT_PROPERTIES RTL_PRINT_FORMAT_PROPERTIES, *PRTL_PRINT_FORMAT_PROPERTIES;
 typedef struct _RTL_RB_TREE RTL_RB_TREE, *PRTL_RB_TREE;
+typedef struct _SECURITY_CLIENT_CONTEXT SECURITY_CLIENT_CONTEXT, *PSECURITY_CLIENT_CONTEXT;
 typedef struct _SECURITY_QUALITY_OF_SERVICE SECURITY_QUALITY_OF_SERVICE, *PSECURITY_QUALITY_OF_SERVICE;
+typedef struct _SECURITY_SUBJECT_CONTEXT SECURITY_SUBJECT_CONTEXT, *PSECURITY_SUBJECT_CONTEXT;
 typedef struct _SINGLE_LIST_ENTRY SINGLE_LIST_ENTRY, *PSINGLE_LIST_ENTRY;
 typedef struct _SMBIOS_TABLE_HEADER SMBIOS_TABLE_HEADER, *PSMBIOS_TABLE_HEADER;
 typedef struct _SMBIOS3_TABLE_HEADER SMBIOS3_TABLE_HEADER, *PSMBIOS3_TABLE_HEADER;
@@ -359,6 +366,8 @@ typedef struct _STRING64 STRING64, *PSTRING64;
 typedef struct _THREAD_INFORMATION_BLOCK THREAD_INFORMATION_BLOCK, *PTHREAD_INFORMATION_BLOCK;
 typedef struct _TIME_FIELDS TIME_FIELDS, *PTIME_FIELDS;
 typedef struct _TIMER_ROUTINES TIMER_ROUTINES, *PTIMER_ROUTINES;
+typedef struct _TOKEN_CONTROL TOKEN_CONTROL, *PTOKEN_CONTROL;
+typedef struct _TOKEN_SOURCE TOKEN_SOURCE, *PTOKEN_SOURCE;
 typedef struct _UEFI_FIRMWARE_INFORMATION UEFI_FIRMWARE_INFORMATION, *PUEFI_FIRMWARE_INFORMATION;
 typedef struct _UNICODE_STRING UNICODE_STRING, *PUNICODE_STRING;
 typedef struct _UNICODE_STRING32 UNICODE_STRING32, *PUNICODE_STRING32;