diff --git a/sdk/xtdk/setypes.h b/sdk/xtdk/setypes.h
index 0cc0943..7213a63 100644
--- a/sdk/xtdk/setypes.h
+++ b/sdk/xtdk/setypes.h
@@ -119,6 +119,15 @@
 /* C/C++ specific code */
 #ifndef __XTOS_ASSEMBLER__
 
+/* The classification type for a security proxy token */
+typedef enum _PROXY_CLASS
+{
+    ProxyFull = 0,
+    ProxyService,
+    ProxyTree,
+    ProxyDirectory
+} PROXY_CLASS, *PPROXY_CLASS;
+
 /* Security impersonation levels */
 typedef enum _SECURITY_IMPERSONATION_LEVEL
 {
@@ -137,6 +146,52 @@ typedef enum _SECURITY_OPERATION_CODE
     AssignSecurityDescriptor
 } SECURITY_OPERATION_CODE, *PSECURITY_OPERATION_CODE;
 
+/* Access token types enumeration list */
+typedef enum _TOKEN_TYPE
+{
+    TokenPrimary = 1,
+    TokenImpersonation
+} TOKEN_TYPE, *PTOKEN_TYPE;
+
+/* Access Control List structure definition */
+typedef struct _ACL
+{
+    UCHAR AclRevision;
+    UCHAR Reserved1;
+    USHORT AclSize;
+    USHORT AceCount;
+    USHORT Reserved2;
+} ACL, *PACL;
+
+/* Bitfields for granular security audit policy categories */
+typedef struct _AUDIT_POLICY_CATEGORIES
+{
+    UCHAR System:4;
+    UCHAR Logon:4;
+    UCHAR ObjectAccess:4;
+    UCHAR PrivilegeUse:4;
+    UCHAR DetailedTracking:4;
+    UCHAR PolicyChange:4;
+    UCHAR AccountManagement:4;
+    UCHAR DirectoryServiceAccess:4;
+    UCHAR AccountLogon:4;
+} AUDIT_POLICY_CATEGORIES, *PAUDIT_POLICY_CATEGORIES;
+
+/* Overlay structure for manipulating audit policy bit masks */
+typedef struct _AUDIT_POLICY_OVERLAY
+{
+    ULONGLONG PolicyBits:36;
+    ULONGLONG SetBit:1;
+} AUDIT_POLICY_OVERLAY, *PAUDIT_POLICY_OVERLAY;
+
+/* Audit policy structure definition */
+typedef union _AUDIT_POLICY
+{
+    AUDIT_POLICY_CATEGORIES PolicyElements;
+    AUDIT_POLICY_OVERLAY PolicyOverlay;
+    ULONGLONG Overlay;
+} AUDIT_POLICY, *PAUDIT_POLICY;
+
 /* Generic security mapping structure definition */
 typedef struct _GENERIC_MAPPING
 {
@@ -197,6 +252,13 @@ typedef struct _SID
     ULONG SubAuthority[1];
 } SID, *PSID;
 
+/* Security Identifier with its corresponding state attributes structure definition */
+typedef struct _SID_ATTRIBUTES
+{
+    PSID Sid;
+    ULONG Attributes;
+} SID_ATTRIBUTES, *PSID_ATTRIBUTES;
+
 /* Token source structure definition */
 typedef struct _TOKEN_SOURCE
 {
@@ -242,6 +304,35 @@ typedef struct _SECURITY_SUBJECT_CONTEXT
     PVOID ProcessAuditId;
 } SECURITY_SUBJECT_CONTEXT, *PSECURITY_SUBJECT_CONTEXT;
 
+/* Per-token audit generation information and access masks structure definition */
+typedef struct _SECURITY_TOKEN_AUDIT_DATA
+{
+    ULONG Length;
+    ULONG GrantMask;
+    ULONG DenyMask;
+} SECURITY_TOKEN_AUDIT_DATA, *PSECURITY_TOKEN_AUDIT_DATA;
+
+/* Security proxy configuration and constraint data structure definition */
+typedef struct _SECURITY_TOKEN_PROXY_DATA
+{
+    ULONG Length;
+    PROXY_CLASS ProxyClass;
+    UNICODE_STRING PathInfo;
+    ULONG ContainerMask;
+    ULONG ObjectMask;
+} SECURITY_TOKEN_PROXY_DATA, *PSECURITY_TOKEN_PROXY_DATA;
+
+/* Active references, device mappings, and tokens tracking data structure definition */
+typedef struct _SESSION_REFERENCES
+{
+    PSESSION_REFERENCES Next;
+    LUID LogonId;
+    ULONG ReferenceCount;
+    ULONG Flags;
+    PDEVICE_MAP DeviceMap;
+    LIST_ENTRY TokenList;
+} SESSION_REFERENCES, *PSESSION_REFERENCES;
+
 /* Access state structure definition */
 typedef struct _ACCESS_STATE
 {
@@ -267,5 +358,41 @@ typedef struct _ACCESS_STATE
     UNICODE_STRING ObjectTypeName;
 } ACCESS_STATE, *PACCESS_STATE;
 
+/* The core access token structure definition */
+typedef struct _TOKEN
+{
+    TOKEN_SOURCE TokenSource;
+    LUID TokenId;
+    LUID AuthenticationId;
+    LUID ParentTokenId;
+    LARGE_INTEGER ExpirationTime;
+    PERESOURCE TokenLock;
+    AUDIT_POLICY AuditPolicy;
+    LUID ModifiedId;
+    ULONG SessionId;
+    ULONG UserAndGroupCount;
+    ULONG RestrictedSidCount;
+    ULONG PrivilegeCount;
+    ULONG VariableLength;
+    ULONG DynamicCharged;
+    ULONG DynamicAvailable;
+    ULONG DefaultOwnerIndex;
+    PSID_ATTRIBUTES UserAndGroups;
+    PSID_ATTRIBUTES RestrictedSids;
+    PSID PrimaryGroup;
+    PLUID_AND_ATTRIBUTES Privileges;
+    PULONG DynamicPart;
+    PACL DefaultDacl;
+    TOKEN_TYPE TokenType;
+    SECURITY_IMPERSONATION_LEVEL ImpersonationLevel;
+    ULONG TokenFlags;
+    BOOLEAN TokenInUse;
+    PSECURITY_TOKEN_PROXY_DATA ProxyData;
+    PSECURITY_TOKEN_AUDIT_DATA AuditData;
+    PSESSION_REFERENCES LogonSession;
+    LUID OriginatingLogonSession;
+    ULONG VariablePart;
+} TOKEN, *PTOKEN;
+
 #endif /* __XTOS_ASSEMBLER__ */
 #endif /* __XTDK_SETYPES_H */
diff --git a/sdk/xtdk/xtstruct.h b/sdk/xtdk/xtstruct.h
index 7290c8c..218e193 100644
--- a/sdk/xtdk/xtstruct.h
+++ b/sdk/xtdk/xtstruct.h
@@ -77,6 +77,7 @@ typedef enum _OBJECT_INFORMATION_CLASS OBJECT_INFORMATION_CLASS, *POBJECT_INFORM
 typedef enum _OBJECT_OPEN_REASON OBJECT_OPEN_REASON, *POBJECT_OPEN_REASON;
 typedef enum _POWER_ACTION POWER_ACTION, *PPOWER_ACTION;
 typedef enum _POWER_STATE_TYPE POWER_STATE_TYPE, *PPOWER_STATE_TYPE;
+typedef enum _PROXY_CLASS PROXY_CLASS, *PPROXY_CLASS;
 typedef enum _PS_QUOTA_TYPE PS_QUOTA_TYPE, *PPS_QUOTA_TYPE;
 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;
@@ -85,11 +86,13 @@ typedef enum _SECURITY_OPERATION_CODE SECURITY_OPERATION_CODE, *PSECURITY_OPERAT
 typedef enum _SYSTEM_FIRMWARE_TYPE SYSTEM_FIRMWARE_TYPE, *PSYSTEM_FIRMWARE_TYPE;
 typedef enum _SYSTEM_POWER_STATE SYSTEM_POWER_STATE, *PSYSTEM_POWER_STATE;
 typedef enum _SYSTEM_RESOURCE_TYPE SYSTEM_RESOURCE_TYPE, *PSYSTEM_RESOURCE_TYPE;
+typedef enum _TOKEN_TYPE TOKEN_TYPE, *PTOKEN_TYPE;
 typedef enum _WAIT_TYPE WAIT_TYPE, *PWAIT_TYPE;
 typedef enum _WORK_QUEUE_TYPE WORK_QUEUE_TYPE, *PWORK_QUEUE_TYPE;
 
 /* Structures forward references */
 typedef struct _ACCESS_STATE ACCESS_STATE, *PACCESS_STATE;
+typedef struct _ACL ACL, *PACL;
 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;
@@ -109,6 +112,8 @@ typedef struct _ACTIVATION_CONTEXT_STACK ACTIVATION_CONTEXT_STACK, *PACTIVATION_
 typedef struct _ANSI_STRING ANSI_STRING, *PANSI_STRING;
 typedef struct _ANSI_STRING32 ANSI_STRING32, *PANSI_STRING32;
 typedef struct _ANSI_STRING64 ANSI_STRING64, *PANSI_STRING64;
+typedef struct _AUDIT_POLICY_CATEGORIES AUDIT_POLICY_CATEGORIES, *PAUDIT_POLICY_CATEGORIES;
+typedef struct _AUDIT_POLICY_OVERLAY AUDIT_POLICY_OVERLAY, *PAUDIT_POLICY_OVERLAY;
 typedef struct _CLIENT_ID CLIENT_ID, *PCLIENT_ID;
 typedef struct _CM_FULL_RESOURCE_DESCRIPTOR CM_FULL_RESOURCE_DESCRIPTOR, *PCM_FULL_RESOURCE_DESCRIPTOR;
 typedef struct _CM_PARTIAL_RESOURCE_DESCRIPTOR CM_PARTIAL_RESOURCE_DESCRIPTOR, *PCM_PARTIAL_RESOURCE_DESCRIPTOR;
@@ -454,7 +459,11 @@ typedef struct _SECURITY_CLIENT_CONTEXT SECURITY_CLIENT_CONTEXT, *PSECURITY_CLIE
 typedef struct _SECURITY_PROCESS_AUDIT_INFO SECURITY_PROCESS_AUDIT_INFO, *PSECURITY_PROCESS_AUDIT_INFO;
 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 _SECURITY_TOKEN_AUDIT_DATA SECURITY_TOKEN_AUDIT_DATA, *PSECURITY_TOKEN_AUDIT_DATA;
+typedef struct _SECURITY_TOKEN_PROXY_DATA SECURITY_TOKEN_PROXY_DATA, *PSECURITY_TOKEN_PROXY_DATA;
+typedef struct _SESSION_REFERENCES SESSION_REFERENCES, *PSESSION_REFERENCES;
 typedef struct _SID SID, *PSID;
+typedef struct _SID_ATTRIBUTES SID_ATTRIBUTES, *PSID_ATTRIBUTES;
 typedef struct _SID_IDENTIFIER_AUTHORITY SID_IDENTIFIER_AUTHORITY, *PSID_IDENTIFIER_AUTHORITY;
 typedef struct _SINGLE_LIST_ENTRY SINGLE_LIST_ENTRY, *PSINGLE_LIST_ENTRY;
 typedef struct _SMBIOS_TABLE_HEADER SMBIOS_TABLE_HEADER, *PSMBIOS_TABLE_HEADER;
@@ -473,6 +482,7 @@ typedef struct _TEB_ACTIVE_FRAME_CONTEXT TEB_ACTIVE_FRAME_CONTEXT, *PTEB_ACTIVE_
 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 TOKEN, *PTOKEN;
 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;
@@ -501,6 +511,7 @@ typedef struct _XTBL_PAGE_MAPPING XTBL_PAGE_MAPPING, *PXTBL_PAGE_MAPPING;
 typedef struct _XTBL_STATUS XTBL_STATUS, *PXTBL_STATUS;
 
 /* Unions forward references */
+typedef union _AUDIT_POLICY AUDIT_POLICY, *PAUDIT_POLICY;
 typedef union _EFI_DEV_PATH EFI_DEV_PATH, *PEFI_DEV_PATH;
 typedef union _EFI_DEV_PATH_PTR EFI_DEV_PATH_PTR, *PEFI_DEV_PATH_PTR;
 typedef union _EFI_FRAMEWORK_MP_HEALTH_FLAGS EFI_FRAMEWORK_MP_HEALTH_FLAGS, *PEFI_FRAMEWORK_MP_HEALTH_FLAGS;