diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6a26cd450..554ef679d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
-## 0.16.21-dev3
+## 0.16.21-dev4
 
 ### Enhancements
+- **Use password** to load PDF with all modes
 
 - **use vectorized logic to merge inferred and extracted layouts**. Using the new `LayoutElements` data structure and numpy library to refactor the layout merging logic to improve compute performance as well as making logic more clear
 
diff --git a/example-docs/pdf/password.pdf b/example-docs/pdf/password.pdf
new file mode 100644
index 000000000..40f63f2af
Binary files /dev/null and b/example-docs/pdf/password.pdf differ
diff --git a/requirements/extra-pdf-image.in b/requirements/extra-pdf-image.in
index 99df48105..816388cbe 100644
--- a/requirements/extra-pdf-image.in
+++ b/requirements/extra-pdf-image.in
@@ -11,5 +11,5 @@ google-cloud-vision
 effdet
 # Do not move to constraints.in, otherwise unstructured-inference will not be upgraded
 # when unstructured library is.
-unstructured-inference>=0.8.6
+unstructured-inference>=0.8.7
 unstructured.pytesseract>=0.3.12
diff --git a/requirements/extra-pdf-image.txt b/requirements/extra-pdf-image.txt
index 910c2e279..f30252303 100644
--- a/requirements/extra-pdf-image.txt
+++ b/requirements/extra-pdf-image.txt
@@ -263,7 +263,7 @@ typing-extensions==4.12.2
     #   torch
 tzdata==2025.1
     # via pandas
-unstructured-inference==0.8.6
+unstructured-inference==0.8.7
     # via -r ./extra-pdf-image.in
 unstructured-pytesseract==0.3.13
     # via -r ./extra-pdf-image.in
diff --git a/test_unstructured/partition/pdf_image/test_pdf.py b/test_unstructured/partition/pdf_image/test_pdf.py
index 0746eab82..8ece56304 100644
--- a/test_unstructured/partition/pdf_image/test_pdf.py
+++ b/test_unstructured/partition/pdf_image/test_pdf.py
@@ -262,7 +262,7 @@ def test_partition_pdf_outputs_valid_amount_of_elements_and_metadata_values(
                     strategy=strategy,
                     starting_page_number=starting_page_number,
                 )
-            _test(result)
+                _test(result)
 
 
 @mock.patch.dict(os.environ, {"UNSTRUCTURED_HI_RES_MODEL_NAME": "checkbox"})
@@ -1545,3 +1545,43 @@ def test_document_to_element_list_sets_category_depth_titles():
     assert elements[1].metadata.category_depth == 2
     assert elements[2].metadata.category_depth is None
     assert elements[3].metadata.category_depth == 0
+
+
+@pytest.mark.parametrize("file_mode", ["filename", "rb", "spool"])
+@pytest.mark.parametrize(
+    "strategy",
+    # fast: can't capture the "intentionally left blank page" page
+    # others: will ignore the actual blank page
+    [
+        PartitionStrategy.FAST,
+        PartitionStrategy.HI_RES,
+        PartitionStrategy.OCR_ONLY,
+    ],
+)
+def test_partition_pdf_with_password(
+    file_mode,
+    strategy,
+    filename=example_doc_path("pdf/password.pdf"),
+):
+    # Test that the partition_pdf function can handle filename
+    def _test(result):
+        # validate that the result is a non-empty list of dicts
+        assert len(result) == 1
+        assert result[0].text == "File with password"
+
+    if file_mode == "filename":
+        result = pdf.partition_pdf(filename=filename, strategy=strategy, password="password")
+        _test(result)
+    elif file_mode == "rb":
+        with open(filename, "rb") as f:
+            result = pdf.partition_pdf(file=f, strategy=strategy, password="password")
+            _test(result)
+    else:
+        with open(filename, "rb") as test_file:
+            with SpooledTemporaryFile() as spooled_temp_file:
+                spooled_temp_file.write(test_file.read())
+                spooled_temp_file.seek(0)
+                result = pdf.partition_pdf(
+                    file=spooled_temp_file, strategy=strategy, password="password"
+                )
+                _test(result)
diff --git a/unstructured/__version__.py b/unstructured/__version__.py
index 15608835a..464c14198 100644
--- a/unstructured/__version__.py
+++ b/unstructured/__version__.py
@@ -1 +1 @@
-__version__ = "0.16.21-dev3"  # pragma: no cover
+__version__ = "0.16.21-dev4"  # pragma: no cover
diff --git a/unstructured/partition/image.py b/unstructured/partition/image.py
index 50ceaa118..712384e0d 100644
--- a/unstructured/partition/image.py
+++ b/unstructured/partition/image.py
@@ -32,6 +32,7 @@ def partition_image(
     starting_page_number: int = 1,
     extract_forms: bool = False,
     form_extraction_skip_tables: bool = True,
+    password: Optional[str] = None,
     **kwargs: Any,
 ) -> list[Element]:
     """Parses an image into a list of interpreted elements.
@@ -91,6 +92,8 @@ def partition_image(
         (results in adding FormKeysValues elements to output).
     form_extraction_skip_tables
         Whether the form extraction logic should ignore regions designated as Tables.
+    password
+        The password to decrypt the PDF file.
     """
     exactly_one(filename=filename, file=file)
 
@@ -113,5 +116,6 @@ def partition_image(
         starting_page_number=starting_page_number,
         extract_forms=extract_forms,
         form_extraction_skip_tables=form_extraction_skip_tables,
+        password=password,
         **kwargs,
     )
diff --git a/unstructured/partition/pdf.py b/unstructured/partition/pdf.py
index 55d3f3c03..9a2efcd65 100644
--- a/unstructured/partition/pdf.py
+++ b/unstructured/partition/pdf.py
@@ -144,6 +144,7 @@ def partition_pdf(
     starting_page_number: int = 1,
     extract_forms: bool = False,
     form_extraction_skip_tables: bool = True,
+    password: Optional[str] = None,
     **kwargs: Any,
 ) -> list[Element]:
     """Parses a pdf document into a list of interpreted elements.
@@ -224,6 +225,7 @@ def partition_pdf(
         starting_page_number=starting_page_number,
         extract_forms=extract_forms,
         form_extraction_skip_tables=form_extraction_skip_tables,
+        password=password,
         **kwargs,
     )
 
@@ -245,6 +247,7 @@ def partition_pdf_or_image(
     starting_page_number: int = 1,
     extract_forms: bool = False,
     form_extraction_skip_tables: bool = True,
+    password: Optional[str] = None,
     **kwargs: Any,
 ) -> list[Element]:
     """Parses a pdf or image document into a list of interpreted elements."""
@@ -273,6 +276,7 @@ def partition_pdf_or_image(
                 languages=languages,
                 metadata_last_modified=metadata_last_modified or last_modified,
                 starting_page_number=starting_page_number,
+                password=password,
                 **kwargs,
             )
             pdf_text_extractable = any(
@@ -322,6 +326,7 @@ def partition_pdf_or_image(
                 starting_page_number=starting_page_number,
                 extract_forms=extract_forms,
                 form_extraction_skip_tables=form_extraction_skip_tables,
+                password=password,
                 **kwargs,
             )
             out_elements = _process_uncategorized_text_elements(elements)
@@ -347,6 +352,7 @@ def partition_pdf_or_image(
                 is_image=is_image,
                 metadata_last_modified=metadata_last_modified or last_modified,
                 starting_page_number=starting_page_number,
+                password=password,
                 **kwargs,
             )
             out_elements = _process_uncategorized_text_elements(elements)
@@ -360,6 +366,7 @@ def extractable_elements(
     languages: Optional[list[str]] = None,
     metadata_last_modified: Optional[str] = None,
     starting_page_number: int = 1,
+    password: Optional[str] = None,
     **kwargs: Any,
 ) -> list[list[Element]]:
     if isinstance(file, bytes):
@@ -370,6 +377,7 @@ def extractable_elements(
         languages=languages,
         metadata_last_modified=metadata_last_modified,
         starting_page_number=starting_page_number,
+        password=password,
         **kwargs,
     )
 
@@ -380,6 +388,7 @@ def _partition_pdf_with_pdfminer(
     languages: list[str],
     metadata_last_modified: Optional[str],
     starting_page_number: int = 1,
+    password: Optional[str] = None,
     **kwargs: Any,
 ) -> list[list[Element]]:
     """Partitions a PDF using PDFMiner instead of using a layoutmodel. Used for faster
@@ -403,6 +412,7 @@ def _partition_pdf_with_pdfminer(
                 languages=languages,
                 metadata_last_modified=metadata_last_modified,
                 starting_page_number=starting_page_number,
+                password=password,
                 **kwargs,
             )
 
@@ -413,6 +423,7 @@ def _partition_pdf_with_pdfminer(
             languages=languages,
             metadata_last_modified=metadata_last_modified,
             starting_page_number=starting_page_number,
+            password=password,
             **kwargs,
         )
 
@@ -427,6 +438,7 @@ def _process_pdfminer_pages(
     metadata_last_modified: Optional[str],
     annotation_threshold: Optional[float] = env_config.PDF_ANNOTATION_THRESHOLD,
     starting_page_number: int = 1,
+    password: Optional[str] = None,
     **kwargs,
 ) -> list[list[Element]]:
     """Uses PDFMiner to split a document into pages and process them."""
@@ -434,7 +446,8 @@ def _process_pdfminer_pages(
     elements = []
 
     for page_number, (page, page_layout) in enumerate(
-        open_pdfminer_pages_generator(fp), start=starting_page_number
+        open_pdfminer_pages_generator(fp, password=password),
+        start=starting_page_number,
     ):
         width, height = page_layout.width, page_layout.height
 
@@ -556,6 +569,7 @@ def _partition_pdf_or_image_local(
     extract_forms: bool = False,
     form_extraction_skip_tables: bool = True,
     pdf_hi_res_max_pages: Optional[int] = None,
+    password: Optional[str] = None,
     **kwargs: Any,
 ) -> list[Element]:
     """Partition using package installed locally"""
@@ -592,10 +606,11 @@ def _partition_pdf_or_image_local(
             is_image=is_image,
             model_name=hi_res_model_name,
             pdf_image_dpi=pdf_image_dpi,
+            password=password,
         )
 
         extracted_layout, layouts_links = (
-            process_file_with_pdfminer(filename=filename, dpi=pdf_image_dpi)
+            process_file_with_pdfminer(filename=filename, dpi=pdf_image_dpi, password=password)
             if pdf_text_extractable
             else ([], [])
         )
@@ -635,6 +650,7 @@ def _partition_pdf_or_image_local(
             ocr_mode=ocr_mode,
             pdf_image_dpi=pdf_image_dpi,
             ocr_layout_dumper=ocr_layout_dumper,
+            password=password,
         )
     else:
         inferred_document_layout = process_data_with_model(
@@ -642,13 +658,14 @@ def _partition_pdf_or_image_local(
             is_image=is_image,
             model_name=hi_res_model_name,
             pdf_image_dpi=pdf_image_dpi,
+            password=password,
         )
 
         if hasattr(file, "seek"):
             file.seek(0)
 
         extracted_layout, layouts_links = (
-            process_data_with_pdfminer(file=file, dpi=pdf_image_dpi)
+            process_data_with_pdfminer(file=file, dpi=pdf_image_dpi, password=password)
             if pdf_text_extractable
             else ([], [])
         )
@@ -690,6 +707,7 @@ def _partition_pdf_or_image_local(
             ocr_mode=ocr_mode,
             pdf_image_dpi=pdf_image_dpi,
             ocr_layout_dumper=ocr_layout_dumper,
+            password=password,
         )
 
     # vectorization of the data structure ends here
@@ -837,6 +855,7 @@ def _partition_pdf_or_image_with_ocr(
     is_image: bool = False,
     metadata_last_modified: Optional[str] = None,
     starting_page_number: int = 1,
+    password: Optional[str] = None,
     **kwargs: Any,
 ):
     """Partitions an image or PDF using OCR. For PDFs, each page is converted
@@ -861,7 +880,7 @@ def _partition_pdf_or_image_with_ocr(
             elements.extend(page_elements)
     else:
         for page_number, image in enumerate(
-            convert_pdf_to_images(filename, file), start=starting_page_number
+            convert_pdf_to_images(filename, file, password=password), start=starting_page_number
         ):
             page_elements = _partition_pdf_or_image_with_ocr_from_image(
                 image=image,
diff --git a/unstructured/partition/pdf_image/ocr.py b/unstructured/partition/pdf_image/ocr.py
index 4642d5b59..953d36713 100644
--- a/unstructured/partition/pdf_image/ocr.py
+++ b/unstructured/partition/pdf_image/ocr.py
@@ -42,6 +42,7 @@ def process_data_with_ocr(
     ocr_mode: str = OCRMode.FULL_PAGE.value,
     pdf_image_dpi: int = 200,
     ocr_layout_dumper: Optional[OCRLayoutDumper] = None,
+    password: Optional[str] = None,
 ) -> "DocumentLayout":
     """
     Process OCR data from a given data and supplement the output DocumentLayout
@@ -89,6 +90,7 @@ def process_data_with_ocr(
             ocr_mode=ocr_mode,
             pdf_image_dpi=pdf_image_dpi,
             ocr_layout_dumper=ocr_layout_dumper,
+            password=password,
         )
 
     return merged_layouts
@@ -105,6 +107,7 @@ def process_file_with_ocr(
     ocr_mode: str = OCRMode.FULL_PAGE.value,
     pdf_image_dpi: int = 200,
     ocr_layout_dumper: Optional[OCRLayoutDumper] = None,
+    password: Optional[str] = None,
 ) -> "DocumentLayout":
     """
     Process OCR data from a given file and supplement the output DocumentLayout
@@ -165,6 +168,7 @@ def process_file_with_ocr(
                     dpi=pdf_image_dpi,
                     output_folder=temp_dir,
                     paths_only=True,
+                    userpw=password or "",
                 )
                 image_paths = cast(List[str], _image_paths)
                 for i, image_path in enumerate(image_paths):
diff --git a/unstructured/partition/pdf_image/pdf_image_utils.py b/unstructured/partition/pdf_image/pdf_image_utils.py
index a809c7f76..d57af9d53 100644
--- a/unstructured/partition/pdf_image/pdf_image_utils.py
+++ b/unstructured/partition/pdf_image/pdf_image_utils.py
@@ -58,6 +58,7 @@ def convert_pdf_to_image(
     dpi: int = 200,
     output_folder: Optional[Union[str, PurePath]] = None,
     path_only: bool = False,
+    password: Optional[str] = None,
 ) -> Union[List[Image.Image], List[str]]:
     """Get the image renderings of the pdf pages using pdf2image"""
 
@@ -71,6 +72,7 @@ def convert_pdf_to_image(
             dpi=dpi,
             output_folder=output_folder,
             paths_only=path_only,
+            userpw=password,
         )
     else:
         images = pdf2image.convert_from_path(
@@ -125,6 +127,7 @@ def save_elements(
     is_image: bool = False,
     extract_image_block_to_payload: bool = False,
     output_dir_path: str | None = None,
+    password: Optional[str] = None,
 ):
     """
     Saves specific elements from a PDF as images either to a directory or embeds them in the
@@ -167,6 +170,7 @@ def save_elements(
                 pdf_image_dpi,
                 output_folder=temp_dir,
                 path_only=True,
+                password=password,
             )
             image_paths = cast(List[str], _image_paths)
 
@@ -389,15 +393,16 @@ def convert_pdf_to_images(
     filename: str = "",
     file: Optional[bytes | IO[bytes]] = None,
     chunk_size: int = 10,
+    password: Optional[str] = None,
 ) -> Iterator[Image.Image]:
     # Convert a PDF in small chunks of pages at a time (e.g. 1-10, 11-20... and so on)
     exactly_one(filename=filename, file=file)
     if file is not None:
         f_bytes = convert_to_bytes(file)
-        info = pdf2image.pdfinfo_from_bytes(f_bytes)
+        info = pdf2image.pdfinfo_from_bytes(f_bytes, userpw=password)
     else:
         f_bytes = None
-        info = pdf2image.pdfinfo_from_path(filename)
+        info = pdf2image.pdfinfo_from_path(filename, userpw=password)
 
     total_pages = info["Pages"]
     for start_page in range(1, total_pages + 1, chunk_size):
@@ -407,12 +412,14 @@ def convert_pdf_to_images(
                 f_bytes,
                 first_page=start_page,
                 last_page=end_page,
+                userpw=password,
             )
         else:
             chunk_images = pdf2image.convert_from_path(
                 filename,
                 first_page=start_page,
                 last_page=end_page,
+                userpw=password,
             )
 
         for image in chunk_images:
diff --git a/unstructured/partition/pdf_image/pdfminer_processing.py b/unstructured/partition/pdf_image/pdfminer_processing.py
index fbce8ec2a..724e34a81 100644
--- a/unstructured/partition/pdf_image/pdfminer_processing.py
+++ b/unstructured/partition/pdf_image/pdfminer_processing.py
@@ -38,12 +38,14 @@ DEFAULT_ROUND = 15
 def process_file_with_pdfminer(
     filename: str = "",
     dpi: int = 200,
+    password: Optional[str] = None,
 ) -> tuple[List[List["TextRegion"]], List[List]]:
     with open_filename(filename, "rb") as fp:
         fp = cast(BinaryIO, fp)
         extracted_layout, layouts_links = process_data_with_pdfminer(
             file=fp,
             dpi=dpi,
+            password=password,
         )
         return extracted_layout, layouts_links
 
@@ -432,6 +434,7 @@ def process_page_layout_from_pdfminer(
 def process_data_with_pdfminer(
     file: Optional[Union[bytes, BinaryIO]] = None,
     dpi: int = 200,
+    password: Optional[str] = None,
 ) -> tuple[List[LayoutElements], List[List]]:
     """Loads the image and word objects from a pdf using pdfplumber and the image renderings of the
     pdf pages using pdf2image"""
@@ -442,7 +445,9 @@ def process_data_with_pdfminer(
     layouts_links = []
     # Coefficient to rescale bounding box to be compatible with images
     coef = dpi / 72
-    for page_number, (page, page_layout) in enumerate(open_pdfminer_pages_generator(file)):
+    for page_number, (page, page_layout) in enumerate(
+        open_pdfminer_pages_generator(file, password=password)
+    ):
         width, height = page_layout.width, page_layout.height
 
         annotation_list = []
diff --git a/unstructured/partition/pdf_image/pdfminer_utils.py b/unstructured/partition/pdf_image/pdfminer_utils.py
index 929affeaa..3544e2676 100644
--- a/unstructured/partition/pdf_image/pdfminer_utils.py
+++ b/unstructured/partition/pdf_image/pdfminer_utils.py
@@ -1,6 +1,6 @@
 import os
 import tempfile
-from typing import BinaryIO, List, Tuple
+from typing import BinaryIO, List, Optional, Tuple
 
 from pdfminer.converter import PDFPageAggregator
 from pdfminer.layout import LAParams, LTContainer, LTImage, LTItem, LTTextLine
@@ -73,6 +73,7 @@ def rect_to_bbox(
 @requires_dependencies(["pikepdf", "pypdf"])
 def open_pdfminer_pages_generator(
     fp: BinaryIO,
+    password: Optional[str] = None,
 ):
     """Open PDF pages using PDFMiner, handling and repairing invalid dictionary constructs."""
 
@@ -84,7 +85,7 @@ def open_pdfminer_pages_generator(
     with tempfile.TemporaryDirectory() as tmp_dir_path:
         tmp_file_path = os.path.join(tmp_dir_path, "tmp_file")
         try:
-            pages = PDFPage.get_pages(fp)
+            pages = PDFPage.get_pages(fp, password=password or "")
             # Detect invalid dictionary construct for entire PDF
             for i, page in enumerate(pages):
                 try:
@@ -93,7 +94,7 @@ def open_pdfminer_pages_generator(
                     page_layout = device.get_result()
                 except PSSyntaxError:
                     logger.info("Detected invalid dictionary construct for PDFminer")
-                    logger.info(f"Repairing the PDF page {i+1} ...")
+                    logger.info(f"Repairing the PDF page {i + 1} ...")
                     # find the error page from binary data fp
                     error_page_data = get_page_data(fp, page_number=i)
                     # repair the error page with pikepdf