diff --git a/components/fpspreadsheet/source/common/fpscrypto.pas b/components/fpspreadsheet/source/common/fpscrypto.pas
index b652b0147..9fd4bbcd6 100644
--- a/components/fpspreadsheet/source/common/fpscrypto.pas
+++ b/components/fpspreadsheet/source/common/fpscrypto.pas
@@ -33,6 +33,7 @@ end;
 function StrToAlgorithm(const AName: String): TsCryptoAlgorithm;
 begin
   case AName of
+    // Excel
     'MD2'        : Result := caMD2;
     'MD4'        : Result := caMD4;
     'MD5'        : Result := caMD5;
@@ -43,7 +44,15 @@ begin
     'SHA-384'    : Result := caSHA384;
     'SHA-512'    : Result := caSHA512;
     'WHIRLPOOL'  : Result := caWHIRLPOOL;
-    else           Result := caUnknown;
+    else
+      // Libre/OpenOffice
+      if pos('sha1', AName) > 0 then    // http://www.w3.org/2000/09/xmldsig#sha1
+        Result := caSHA1
+      else
+      if pos('sha256', AName) > 0 then  // http://www.w3.org/2000/09/xmldsig#sha256
+        Result := caSHA256
+      else
+        Result := caUnknown;
   end;
 end;
 
diff --git a/components/fpspreadsheet/source/common/fpsopendocument.pas b/components/fpspreadsheet/source/common/fpsopendocument.pas
index 0d351fdd1..e3d7c327e 100644
--- a/components/fpspreadsheet/source/common/fpsopendocument.pas
+++ b/components/fpspreadsheet/source/common/fpsopendocument.pas
@@ -115,6 +115,7 @@ type
     procedure ReadColumns(ATableNode: TDOMNode);
     procedure ReadColumnStyle(AStyleNode: TDOMNode);
     procedure ReadDateMode(SpreadSheetNode: TDOMNode);
+    procedure ReadDocumentProtection(ANode: TDOMNode);
     procedure ReadFont(ANode: TDOMNode; var AFontName: String;
       var AFontSize: Single; var AFontStyle: TsFontStyles; var AFontColor: TsColor;
       var AFontPosition: TsFontPosition);
@@ -129,6 +130,7 @@ type
     procedure ReadRowsAndCells(ATableNode: TDOMNode);
     procedure ReadRowStyle(AStyleNode: TDOMNode);
     procedure ReadShapes(ATableNode: TDOMNode);
+    procedure ReadSheetProtection(ANode: TDOMNode; ASheet: TsWorksheet);
     procedure ReadTableStyle(AStyleNode: TDOMNode);
 
   protected
@@ -285,8 +287,7 @@ uses
  {$IFDEF FPS_VARISBOOL}
   fpsPatches,
  {$ENDIF}
-  fpsStrings, fpsStreams, fpsClasses, fpsExprParser,
-  fpsImages;
+  fpsStrings, fpsStreams, fpsCrypto, fpsClasses, fpsExprParser, fpsImages;
 
 const
   { OpenDocument general XML constants }
@@ -2060,6 +2061,25 @@ begin
     raise Exception.CreateFmt('Spreadsheet file corrupt: cannot handle null-date format %s', [NullDateSetting]);
 end;
 
+procedure TsSpreadOpenDocReader.ReadDocumentProtection(ANode: TDOMNode);
+var
+  s: String;
+  cinfo: TsCryptoInfo;
+begin
+  if ANode = nil then
+    exit;
+
+  if GetAttrValue(ANode, 'table:structure-protected') = 'true' then
+    Workbook.Protection := Workbook.Protection + [bpLockStructure]
+  else
+    exit;
+
+  InitCryptoInfo(cinfo);
+  cinfo.PasswordHash := GetAttrValue(ANode, 'table:protection-key');
+  cinfo.Algorithm := StrToAlgorithm(GetAttrValue(ANode, 'table:protection-key-digest-algorithm'));
+  Workbook.CryptoInfo := cinfo;
+end;
+
 { Reads font data from an xml node and returns the font elements. }
 procedure TsSpreadOpenDocReader.ReadFont(ANode: TDOMNode; var AFontName: String;
   var AFontSize: Single; var AFontStyle: TsFontStyles; var AFontColor: TsColor;
@@ -2468,6 +2488,7 @@ begin
     if not Assigned(SpreadSheetNode) then
       raise Exception.Create('[TsSpreadOpenDocReader.ReadFromStream] Node "office:spreadsheet" not found.');
 
+    ReadDocumentProtection(SpreadsheetNode);
     ReadDateMode(SpreadSheetNode);
 
     //process each table (sheet)
@@ -2485,6 +2506,8 @@ begin
       end;
       FWorkSheet := FWorkbook.AddWorksheet(GetAttrValue(TableNode, 'table:name'), true);
       tablestyleName := GetAttrValue(TableNode, 'table:style-name');
+      // Read protection
+      ReadSheetProtection(TableNode, FWorksheet);
       // Collect embedded images
       ReadShapes(TableNode);
       // Collect column styles used
@@ -3882,6 +3905,50 @@ begin
   end;
 end;
 
+procedure TsSpreadOpenDocReader.ReadSheetProtection(ANode: TDOMNode;
+  ASheet: TsWorksheet);
+var
+  s: String;
+  sp: TsWorksheetProtections;
+  cinfo: TsCryptoInfo;
+  childNode: TDOMNode;
+  nodeName: String;
+begin
+  if ANode = nil then
+    exit;
+  s := GetAttrValue(ANode, 'table:protected');
+  if s = 'true' then begin
+    sp := DEFAULT_SHEET_PROTECTION;
+    Include(sp, spCells);
+
+    // These items are ALLOWED (unlike Excel where they are FORBIDDEN).
+    // <loext:table-protection loext:select-unprotected-cells="true" />
+    // <loext:table-protection loext:select-protected-cells="true" />
+    // <loext:table-protection />
+    childNode := ANode.FirstChild;
+    while childNode <> nil do
+    begin
+      nodeName := childnode.NodeName;
+      if nodeName = 'loext:table-protection' then begin
+        s := GetAttrValue(childnode, 'loext:select-unprotected-cells');
+        if s='true' then Exclude(sp, spSelectUnlockedCells)
+          else Include(sp, spSelectUnlockedCells);
+        if s='false' then Exclude(sp, spSelectLockedCells)
+          else Include(sp, spSelectLockedCells);
+      end;
+      childNode := childNode.NextSibling;
+    end;
+    ASheet.Protection := sp;
+    ASheet.Protect(true);
+
+    InitCryptoInfo(cinfo);
+    cinfo.PasswordHash := GetAttrValue(ANode, 'table:protection-key');
+    cinfo.Algorithm := StrToAlgorithm(GetAttrValue(ANode, 'table:protection-key-digest-algorithm'));
+    ASheet.CryptoInfo := cinfo;
+  end else
+    ASheet.Protect(false);
+end;
+
 procedure TsSpreadOpenDocReader.ReadStyles(AStylesNode: TDOMNode);
 var
   styleNode: TDOMNode;
@@ -4220,6 +4287,17 @@ begin
               fmt.VertAlignment := vaBottom;
             if fmt.VertAlignment <> vaDefault then
               Include(fmt.UsedFormattingFields, uffVertAlign);
+
+            // Protection
+            s := GetAttrValue(styleChildNode, 'style:cell-protect');
+            if s = 'none' then
+              fmt.Protection := []
+            else if s = 'hidden-and-protected' then
+              fmt.Protection := [cpLockCell, cpHideFormulas]
+            else if s = 'protected' then
+              fmt.Protection := [cpLockCell]
+            else if s = 'formula-hidden' then
+              fmt.Protection := [cpHideFormulas];
           end
           else
           if nodeName = 'style:paragraph-properties' then
diff --git a/components/fpspreadsheet/source/common/fpspreadsheet.pas b/components/fpspreadsheet/source/common/fpspreadsheet.pas
index 4d4549bc4..076e5ee12 100644
--- a/components/fpspreadsheet/source/common/fpspreadsheet.pas
+++ b/components/fpspreadsheet/source/common/fpspreadsheet.pas
@@ -1189,7 +1189,8 @@ begin
   FActiveCellRow := UNASSIGNED_ROW_COL_INDEX;
   FActiveCellCol := UNASSIGNED_ROW_COL_INDEX;
 
-  FProtection := DEFAULT_SHEET_PROTECTIONS;
+  FProtection := DEFAULT_SHEET_PROTECTION;
+  InitCryptoInfo(FCryptoInfo);
 
   FOptions := [soShowGridLines, soShowHeaders];
 end;
@@ -7981,6 +7982,10 @@ begin
   // Add default cell format
   InitFormatRecord(fmt);
   AddCellFormat(fmt);
+
+  // Protection
+  InitCryptoInfo(FCryptoInfo);
+  FProtection := [];
 end;
 
 {@@ ----------------------------------------------------------------------------
diff --git a/components/fpspreadsheet/source/common/fpstypes.pas b/components/fpspreadsheet/source/common/fpstypes.pas
index 9d0ad2bf2..d3a1641e3 100644
--- a/components/fpspreadsheet/source/common/fpstypes.pas
+++ b/components/fpspreadsheet/source/common/fpstypes.pas
@@ -650,7 +650,6 @@ type
   TsCryptoInfo = record
     PasswordHash: String;
     Algorithm: TsCryptoAlgorithm;
-    HashValue: string;
     SaltValue: string;
     SpinCount: Integer;
   end;
@@ -680,7 +679,7 @@ const
     spCells, spSort, spSelectLockedCells, spSelectUnlockedCells
     {, spObjects, spPivotTables, spScenarios} ];
 
-  DEFAULT_SHEET_PROTECTIONS = ALL_SHEET_PROTECTIONS - [spSelectLockedCells, spSelectUnlockedcells];
+  DEFAULT_SHEET_PROTECTION = ALL_SHEET_PROTECTIONS - [spSelectLockedCells, spSelectUnlockedcells];
 
   DEFAULT_CELL_PROTECTION = [cpLockCell];
 
diff --git a/components/fpspreadsheet/source/common/fpsutils.pas b/components/fpspreadsheet/source/common/fpsutils.pas
index a1b8234f4..6900849a0 100644
--- a/components/fpspreadsheet/source/common/fpsutils.pas
+++ b/components/fpspreadsheet/source/common/fpsutils.pas
@@ -2087,7 +2087,6 @@ procedure InitCryptoInfo(out AValue: TsCryptoInfo);
 begin
   AValue.PasswordHash := '';
   AValue.Algorithm := caUnknown;
-  AValue.HashValue := '';
   AValue.SaltValue := '';
   AValue.SpinCount := 0;
 end;
diff --git a/components/fpspreadsheet/source/common/xlscommon.pas b/components/fpspreadsheet/source/common/xlscommon.pas
index f8d87a70c..c4f24a7ce 100644
--- a/components/fpspreadsheet/source/common/xlscommon.pas
+++ b/components/fpspreadsheet/source/common/xlscommon.pas
@@ -2043,14 +2043,14 @@ begin
 
   if AWorksheet = nil then begin
     // Password for workbook protection
-    cinfo := FWorkbook.CryptoInfo;
+    InitCryptoInfo(cinfo);
     cinfo.PasswordHash := Format('%.4x', [hash]);
     cinfo.Algorithm := caExcel;
     FWorkbook.CryptoInfo := cinfo;
   end else
   begin
     // Password for worksheet protection
-    cinfo := AWorksheet.CryptoInfo;
+    InitCryptoInfo(cinfo);
     cinfo.PasswordHash := Format('%.4x', [hash]);
     cinfo.Algorithm := caExcel;
     AWorksheet.CryptoInfo := cinfo;
diff --git a/components/fpspreadsheet/source/common/xlsxooxml.pas b/components/fpspreadsheet/source/common/xlsxooxml.pas
index 96f4df9ba..91bbca3f3 100644
--- a/components/fpspreadsheet/source/common/xlsxooxml.pas
+++ b/components/fpspreadsheet/source/common/xlsxooxml.pas
@@ -2006,7 +2006,7 @@ procedure TsSpreadOOXMLReader.ReadSheetProtection(ANode: TDOMNode;
 var
   s: String;
   shc: TsCryptoInfo;
-  shp0, shp1: TsWorksheetProtections;
+  shp: TsWorksheetProtections;
 begin
   if ANode = nil then
     exit;
@@ -2036,100 +2036,83 @@ begin
   end;
   AWorksheet.CryptoInfo := shc;
 
-  shp1 := [];                     // will get "1" to include
-  shp0 := ALL_SHEET_PROTECTIONS;  // will get "0" to exclude
+  shp := DEFAULT_SHEET_PROTECTION;
 
   // Attribute not found -> property = false
   s := GetAttrValue(ANode, 'sheet');
-  if (s = '1') then
-    Include(shp1, spCells) else
-    Exclude(shp0, spCells);
+  if (s = '1') then Include(shp, spCells) else
+    if (s = '0') or (s = '') then Exclude(shp, spCells);
 
   s := GetAttrValue(ANode, 'selectLockedCells');
-  if (s = '1') then
-    Include(shp1, spSelectLockedCells) else
-    Exclude(shp0, spSelectLockedCells);
+  if (s = '1') then Include(shp, spSelectLockedCells) else
+    if (s = '0') or (s = '') then Exclude(shp, spSelectLockedCells);
 
   s := GetAttrValue(ANode, 'selectUnlockedCells');
-  if (s = '1') then
-    Include(shp1, spSelectUnlockedCells) else
-    Exclude(shp0, spSelectUnlockedCells);
+  if (s = '1') then Include(shp, spSelectUnlockedCells) else
+    if (s = '') or (s = '0') then Exclude(shp, spSelectUnlockedCells);
 
   // these options are currently not supported by fpspreadsheet
   {
   s := GetAttrValue(ANode, 'objects');
-  if (s = '1') then
-    Include(shp1, spObjects) else
-    Exclude(shp0, spObjects);
+  if (s = '1') then Include(shp, spObjects) else
+    if (s = '') or (s = '0') then Exclude(shp, spObjects);
 
   s := GetAttrValue(ANode, 'scenarios');
-  if (s = '1') then
-    Include(shp1, spScenarios) else
-    Exclude(shp0, spScenarios);
+  if (s = '1') then Include(shp, spScenarios) else
+    if (s = '') or (s = '0') then Exclude(shp, spScenarios);
   }
 
   // Attribute not found -> property = true
   {
   s := GetAttrValue(ANode, 'autoFilter');
-  if (s = '0') then
-    Exclude(shp1, spAutoFilter) else
-    Include(shp0, spAutoFilter);
+  if (s = '0') then Exclude(shp, spAutoFilter) else
+    if (s = '') or (s = '1') then Include(shp, spAutoFilter);
   }
 
   s := GetAttrValue(ANode, 'deleteColumns');
-  if (s = '0') then
-    Exclude(shp0, spDeleteColumns) else
-    Include(shp1, spDeleteColumns);
+  if (s = '0') then Exclude(shp, spDeleteColumns) else
+    if (s = '') or (s = '1') then Include(shp, spDeleteColumns);
 
   s := GetAttrValue(ANode, 'deleteRows');
-  if (s = '0') then
-    Exclude(shp0, spDeleteRows) else
-    Include(shp1, spDeleteRows);
+  if (s = '0') then Exclude(shp, spDeleteRows) else
+    if (s = '') or (s = '1') then Include(shp, spDeleteRows);
 
   s := GetAttrValue(ANode, 'formatCells');
-  if (s = '0') then
-    Exclude(shp0, spFormatCells) else
-    Include(shp1, spFormatCells);
+  if (s = '0') then Exclude(shp, spFormatCells) else
+    if (s = '') or (s = '1') then Include(shp, spFormatCells);
 
   s := GetAttrValue(ANode, 'formatColumns');
-  if (s = '0') then
-    Exclude(shp0, spFormatColumns) else
-    Include(shp1, spFormatColumns);
+  if (s = '0') then Exclude(shp, spFormatColumns) else
+    if (s = '') or (s = '1') then Include(shp, spFormatColumns);
 
   s := GetAttrValue(ANode, 'formatRows');
-  if (s = '0') then
-    Exclude(shp0, spFormatRows) else
-    Include(shp1, spFormatRows);
+  if (s = '0') then Exclude(shp, spFormatRows) else
+    if (s = '') or (s = '1') then Include(shp, spFormatRows);
 
   s := GetAttrValue(ANode, 'insertColumns');
-  if (s = '0') then
-    Exclude(shp0, spInsertColumns) else
-    Include(shp1, spInsertColumns);
+  if (s = '0') then Exclude(shp, spInsertColumns) else
+    if (s = '') or (s = '1') then Include(shp, spInsertColumns);
 
   s := GetAttrValue(ANode, 'insertHyperlinks');
-  if (s = '0') then
-    Exclude(shp0, spInsertHyperlinks) else
-    Include(shp1, spInsertHyperlinks);
+  if (s = '0') then Exclude(shp, spInsertHyperlinks) else
+    if (s = '') or (s = '1') then Include(shp, spInsertHyperlinks);
 
   s := GetAttrValue(ANode, 'insertRows');
-  if (s = '0') then
-    Exclude(shp0, spInsertRows) else
-    Include(shp1, spInsertRows);
+  if (s = '0') then Exclude(shp, spInsertRows) else
+    if (s = '') or (s = '1') then Include(shp, spInsertRows);
 
   s := GetAttrValue(ANode, 'sort');
-  if (s = '0') then
-    Exclude(shp0, spSort) else
-    Include(shp1, spSort);
+  if (s = '0') then Exclude(shp, spSort) else
+    if (s = '') or (s = '1') then Include(shp, spSort);
 
   // Currently no pivottable support in fpspreadsheet
   {
   s := GetAttrValue(ANode, 'pivotTables');
-  if (s = '0') then
-    Exclude(shp0, spPivotTables) else
-    Include(shp1, spPivotTables);
+  if (s = '0') then Exclude(shp, spPivotTables) else
+    if (s = '') or (s = '1') then Include(shp, spPivotTables);
   }
 
-  AWorksheet.Protection := shp0 + shp1;
+  AWorksheet.Protection := shp;
   AWorksheet.Protect(true);
 end;
 
@@ -3449,7 +3432,7 @@ begin
       s := s + ' password="' + AWorksheet.CryptoInfo.PasswordHash + '"'
     else
     begin
-      s := s + ' hashValue="' + AWorksheet.CryptoInfo.HashValue + '"';
+      s := s + ' hashValue="' + AWorksheet.CryptoInfo.PasswordHash + '"';
 
       if AWorksheet.CryptoInfo.Algorithm <> caUnknown then
         s := s + ' algorithmName="' + AlgorithmToStr(AWorksheet.CryptoInfo.Algorithm) + '"';
diff --git a/components/fpspreadsheet/source/visual/fpspreadsheetctrls.pas b/components/fpspreadsheet/source/visual/fpspreadsheetctrls.pas
index 622a7b995..c93d77ef0 100644
--- a/components/fpspreadsheet/source/visual/fpspreadsheetctrls.pas
+++ b/components/fpspreadsheet/source/visual/fpspreadsheetctrls.pas
@@ -3655,9 +3655,8 @@ begin
       AStrings.Add('(-) CryptoInfo=');
       AStrings.Add(Format('  PasswordHash=%s', [Workbook.CryptoInfo.PasswordHash]));
       AStrings.Add(Format('  Algorithm=%s', [AlgorithmToStr(Workbook.CryptoInfo.Algorithm)]));
-      AStrings.Add(Format('  HashValue=%s', [Workbook.CryptoInfo.HashValue]));
       AStrings.Add(Format('  SaltValue=%s', [Workbook.CryptoInfo.SaltValue]));
-      AStrings.Add(Format('  SplinCount=%d', [Workbook.CryptoInfo.SpinCount]));
+      AStrings.Add(Format('  SpinCount=%d', [Workbook.CryptoInfo.SpinCount]));
     end else
       AStrings.Add('(+) CryptoInfo=(dblclick for more...)');
 
@@ -3839,9 +3838,8 @@ begin
       AStrings.Add('(-) CryptoInfo=');
       AStrings.Add(Format('  PasswordHash=%s', [Worksheet.CryptoInfo.PasswordHash]));
       AStrings.Add(Format('  Algorithm=%s', [AlgorithmToStr(Worksheet.CryptoInfo.Algorithm)]));
-      AStrings.Add(Format('  HashValue=%s', [Worksheet.CryptoInfo.HashValue]));
       AStrings.Add(Format('  SaltValue=%s', [Worksheet.CryptoInfo.SaltValue]));
-      AStrings.Add(Format('  SplinCount=%d', [Worksheet.CryptoInfo.SpinCount]));
+      AStrings.Add(Format('  SpinCount=%d', [Worksheet.CryptoInfo.SpinCount]));
     end else
       AStrings.Add('(+) CryptoInfo=(dblclick for more...)');