diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ce7ddd5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,173 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# pipenv
+Pipfile.lock
+
+# PEP 582
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# IDEs
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+.project
+.classpath
+.settings/
+
+# Claude specific
+.claude/*
+
+# OS specific
+.DS_Store
+Thumbs.db
+
+# Project specific
+*.log
+*.pid
+*.seed
+*.pid.lock
+
+# Testing
+.pytest_cache/
+.coverage
+htmlcov/
+coverage.xml
+.tox/
+.nox/
+
+# Virtual environments
+venv/
+env/
+ENV/
+
+# Package managers
+# Note: We do NOT ignore poetry.lock or uv.lock as they should be committed
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
\ No newline at end of file
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new file mode 100644
index 0000000..1a9692c
--- /dev/null
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+
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+packaging = "*"
+pluggy = ">=0.12,<2.0"
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+
+[package.extras]
+testing = ["argcomplete", "attrs (>=19.2.0)", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.7.2)", "requests", "setuptools", "xmlschema"]
+
+[[package]]
+name = "pytest-cov"
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+optional = false
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+testing = ["fields", "hunter", "process-tests", "pytest-xdist", "six", "virtualenv"]
+
+[[package]]
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+optional = false
+python-versions = ">=3.8"
+groups = ["main", "dev"]
+files = [
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+
+[[package]]
+name = "typing-inspect"
+version = "0.9.0"
+description = "Runtime inspection utilities for typing module."
+optional = false
+python-versions = "*"
+groups = ["main"]
+files = [
+    {file = "typing_inspect-0.9.0-py3-none-any.whl", hash = "sha256:9ee6fc59062311ef8547596ab6b955e1b8aa46242d854bfc78f4f6b0eff35f9f"},
+    {file = "typing_inspect-0.9.0.tar.gz", hash = "sha256:b23fc42ff6f6ef6954e4852c1fb512cdd18dbea03134f91f856a95ccc9461f78"},
+]
+
+[package.dependencies]
+mypy-extensions = ">=0.3.0"
+typing-extensions = ">=3.7.4"
+
+[metadata]
+lock-version = "2.1"
+python-versions = "^3.8"
+content-hash = "6182486b19a5aa014f1712a5d1364d410b3760e30ec1cc39bf0b4cafceb6c8ed"
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..d925a30
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,85 @@
+[tool.poetry]
+name = "zero-knowledge"
+version = "1.0.0"
+description = "Zero-Knowledge Proof Implementation with HMAC Communication Implementation in Pure Python"
+authors = ["zk-Call <contact@zkcall.net>"]
+readme = "README.md"
+packages = [{include = "src"}]
+homepage = "https://github.com/zk-Call"
+classifiers = [
+    "License :: OSI Approved :: MIT License",
+    "Topic :: Security :: Cryptography",
+]
+
+[tool.poetry.dependencies]
+python = "^3.8"
+ECPy = "*"
+pyjwt = "*"
+dataclasses-json = "*"
+
+[tool.poetry.group.dev.dependencies]
+pytest = "^7.4.0"
+pytest-cov = "^4.1.0"
+pytest-mock = "^3.11.1"
+
+[tool.poetry.scripts]
+test = "pytest:main"
+tests = "pytest:main"
+
+[tool.pytest.ini_options]
+minversion = "7.0"
+testpaths = ["tests"]
+python_files = ["test_*.py", "*_test.py"]
+python_classes = ["Test*"]
+python_functions = ["test_*"]
+addopts = [
+    "-ra",
+    "--strict-markers",
+    "--strict-config",
+    "--cov=src",
+    "--cov-branch",
+    "--cov-report=term-missing:skip-covered",
+    "--cov-report=html:htmlcov",
+    "--cov-report=xml:coverage.xml",
+    "--cov-fail-under=0",  # Set to 0 for infrastructure setup, change to 80 for actual tests
+]
+markers = [
+    "unit: Unit tests",
+    "integration: Integration tests",
+    "slow: Slow running tests",
+]
+
+[tool.coverage.run]
+source = ["src"]
+branch = true
+omit = [
+    "*/tests/*",
+    "*/__init__.py",
+    "*/setup.py",
+]
+
+[tool.coverage.report]
+exclude_lines = [
+    "pragma: no cover",
+    "def __repr__",
+    "if self.debug:",
+    "if __name__ == .__main__.:",
+    "raise AssertionError",
+    "raise NotImplementedError",
+    "if 0:",
+    "if False:",
+    "class .*\\bProtocol\\):",
+    "@(abc\\.)?abstractmethod",
+]
+show_missing = true
+precision = 2
+
+[tool.coverage.html]
+directory = "htmlcov"
+
+[tool.coverage.xml]
+output = "coverage.xml"
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"
\ No newline at end of file
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..739954c
--- /dev/null
+++ b/tests/__init__.py
@@ -0,0 +1 @@
+# Tests package
\ No newline at end of file
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..273a170
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,138 @@
+"""Shared pytest fixtures and configuration."""
+import os
+import tempfile
+from pathlib import Path
+from typing import Generator, Dict, Any
+import pytest
+from unittest.mock import MagicMock, patch
+
+
+@pytest.fixture
+def temp_dir() -> Generator[Path, None, None]:
+    """Create a temporary directory for test files."""
+    with tempfile.TemporaryDirectory() as tmp_dir:
+        yield Path(tmp_dir)
+
+
+@pytest.fixture
+def mock_config() -> Dict[str, Any]:
+    """Provide a mock configuration dictionary."""
+    return {
+        "debug": False,
+        "timeout": 30,
+        "max_retries": 3,
+        "log_level": "INFO",
+        "api_key": "test-api-key",
+        "secret_key": "test-secret-key",
+    }
+
+
+@pytest.fixture
+def mock_logger():
+    """Provide a mock logger."""
+    logger = MagicMock()
+    logger.debug = MagicMock()
+    logger.info = MagicMock()
+    logger.warning = MagicMock()
+    logger.error = MagicMock()
+    logger.critical = MagicMock()
+    return logger
+
+
+@pytest.fixture
+def sample_data() -> Dict[str, Any]:
+    """Provide sample test data."""
+    return {
+        "message": "test message",
+        "timestamp": 1234567890,
+        "data": {
+            "key1": "value1",
+            "key2": "value2",
+            "nested": {
+                "inner_key": "inner_value"
+            }
+        },
+        "list_data": [1, 2, 3, 4, 5],
+    }
+
+
+@pytest.fixture
+def mock_file_system(temp_dir: Path):
+    """Mock file system operations."""
+    def write_file(filename: str, content: str) -> Path:
+        file_path = temp_dir / filename
+        file_path.write_text(content)
+        return file_path
+    
+    def read_file(filename: str) -> str:
+        file_path = temp_dir / filename
+        return file_path.read_text()
+    
+    return {
+        "write": write_file,
+        "read": read_file,
+        "temp_dir": temp_dir,
+    }
+
+
+@pytest.fixture
+def environment_variables():
+    """Temporarily set environment variables for testing."""
+    original_env = os.environ.copy()
+    
+    def set_env(**kwargs):
+        for key, value in kwargs.items():
+            os.environ[key] = str(value)
+    
+    yield set_env
+    
+    # Restore original environment
+    os.environ.clear()
+    os.environ.update(original_env)
+
+
+@pytest.fixture
+def mock_random():
+    """Mock random number generation for deterministic tests."""
+    with patch('random.random', return_value=0.5):
+        with patch('random.randint', return_value=42):
+            with patch('random.choice', lambda x: x[0] if x else None):
+                yield
+
+
+@pytest.fixture
+def capture_logs():
+    """Capture log messages during tests."""
+    import logging
+    from io import StringIO
+    
+    log_capture = StringIO()
+    handler = logging.StreamHandler(log_capture)
+    handler.setLevel(logging.DEBUG)
+    
+    # Get root logger
+    logger = logging.getLogger()
+    original_level = logger.level
+    logger.setLevel(logging.DEBUG)
+    logger.addHandler(handler)
+    
+    yield log_capture
+    
+    # Cleanup
+    logger.removeHandler(handler)
+    logger.setLevel(original_level)
+
+
+@pytest.fixture(autouse=True)
+def cleanup_test_files(request, temp_dir: Path):
+    """Automatically cleanup test files after each test."""
+    yield
+    # Cleanup happens automatically with temp_dir fixture
+
+
+# Markers for conditional test execution
+def pytest_configure(config):
+    """Register custom markers."""
+    config.addinivalue_line("markers", "unit: Unit tests")
+    config.addinivalue_line("markers", "integration: Integration tests")
+    config.addinivalue_line("markers", "slow: Slow running tests")
\ No newline at end of file
diff --git a/tests/integration/__init__.py b/tests/integration/__init__.py
new file mode 100644
index 0000000..e27cd7a
--- /dev/null
+++ b/tests/integration/__init__.py
@@ -0,0 +1 @@
+# Integration tests package
\ No newline at end of file
diff --git a/tests/test_infrastructure_validation.py b/tests/test_infrastructure_validation.py
new file mode 100644
index 0000000..477bfa0
--- /dev/null
+++ b/tests/test_infrastructure_validation.py
@@ -0,0 +1,107 @@
+"""Validation tests to verify the testing infrastructure is properly set up."""
+import pytest
+import sys
+from pathlib import Path
+
+
+class TestInfrastructureValidation:
+    """Validate that the testing infrastructure is properly configured."""
+    
+    @pytest.mark.unit
+    def test_pytest_is_installed(self):
+        """Verify pytest is installed and importable."""
+        import pytest
+        assert pytest.__version__
+    
+    @pytest.mark.unit
+    def test_pytest_cov_is_installed(self):
+        """Verify pytest-cov is installed."""
+        import pytest_cov
+        assert pytest_cov
+    
+    @pytest.mark.unit
+    def test_pytest_mock_is_installed(self):
+        """Verify pytest-mock is installed."""
+        import pytest_mock
+        assert pytest_mock
+    
+    @pytest.mark.unit
+    def test_src_module_is_importable(self):
+        """Verify the src module can be imported."""
+        # Add parent directory to path for imports
+        project_root = Path(__file__).parent.parent
+        if str(project_root) not in sys.path:
+            sys.path.insert(0, str(project_root))
+        
+        # Test importing main modules
+        import src.HMAC
+        import src.SeedGeneration
+        import src.ZeroKnowledge
+        
+        assert src.HMAC
+        assert src.SeedGeneration
+        assert src.ZeroKnowledge
+    
+    @pytest.mark.unit
+    def test_fixtures_are_available(self, temp_dir, mock_config, mock_logger):
+        """Verify custom fixtures are available."""
+        assert temp_dir.exists()
+        assert isinstance(mock_config, dict)
+        assert hasattr(mock_logger, 'info')
+    
+    @pytest.mark.unit
+    def test_markers_are_registered(self, pytestconfig):
+        """Verify custom markers are properly registered."""
+        markers = pytestconfig.getini('markers')
+        marker_names = [m.split(':')[0] for m in markers]
+        
+        assert 'unit' in marker_names
+        assert 'integration' in marker_names
+        assert 'slow' in marker_names
+    
+    @pytest.mark.unit
+    def test_coverage_configuration(self):
+        """Verify coverage is properly configured."""
+        import coverage
+        assert coverage.__version__
+    
+    @pytest.mark.integration
+    def test_test_discovery(self):
+        """Verify pytest can discover tests properly."""
+        test_dir = Path(__file__).parent
+        assert test_dir.exists()
+        assert (test_dir / '__init__.py').exists()
+        assert (test_dir / 'conftest.py').exists()
+    
+    @pytest.mark.unit
+    def test_environment_isolation(self, environment_variables):
+        """Test that environment variables fixture works correctly."""
+        import os
+        
+        # Set test variable
+        environment_variables(TEST_VAR="test_value")
+        assert os.environ.get("TEST_VAR") == "test_value"
+    
+    @pytest.mark.unit
+    def test_file_operations(self, mock_file_system):
+        """Test file system mock fixture."""
+        # Write a test file
+        test_content = "Hello, testing!"
+        file_path = mock_file_system["write"]("test.txt", test_content)
+        
+        # Read it back
+        content = mock_file_system["read"]("test.txt")
+        assert content == test_content
+        assert file_path.exists()
+
+
+@pytest.mark.slow
+class TestSlowOperations:
+    """Example of slow test marking."""
+    
+    def test_slow_operation(self):
+        """Example slow test (actually fast for validation)."""
+        import time
+        # Simulated slow operation (but actually fast)
+        time.sleep(0.01)
+        assert True
\ No newline at end of file
diff --git a/tests/unit/__init__.py b/tests/unit/__init__.py
new file mode 100644
index 0000000..07c9273
--- /dev/null
+++ b/tests/unit/__init__.py
@@ -0,0 +1 @@
+# Unit tests package
\ No newline at end of file