diff --git a/.vscode/cSpell.json b/.vscode/cSpell.json
new file mode 100644
index 0000000..ed2510a
--- /dev/null
+++ b/.vscode/cSpell.json
@@ -0,0 +1,39 @@
+// cSpell Settings
+{
+    // Version of the setting file.  Always 0.1
+    "version": "0.1",
+    // language - current active spelling language
+    "language": "en",
+    // words - list of words to be always considered correct
+    "words": [
+        "Ponduit",
+        "NTFS",
+        "Repo",
+        "Hashtable",
+        "googlemail",
+        "Cmdlet",
+        "appveyor",
+        "GUID",
+        "wildcards",
+        "Cmdlets",
+        "codecoverage",
+        "notmatch",
+        "Httpclient",
+        "Multipart",
+        "formdata",
+        "callsign",
+        "Veyor",
+        "notlike",
+        "Params",
+        "testresults",
+        "powershellgallery",
+        "chocolatey",
+        "choco"
+    ],
+    // flagWords - list of words to be always considered incorrect
+    // This is useful for offensive words and common spelling errors.
+    // For example "hte" should be "the"
+    "flagWords": [
+        "hte"
+    ]
+}
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..05e9a14
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,50 @@
+// Place your settings in this file to overwrite default and user settings.
+{
+    // Set basic file related options:
+    "files.encoding": "utf8",
+    "files.eol": "\r\n",
+    "files.trimTrailingWhitespace": true,
+    "files.insertFinalNewline": true,
+    // Formation and editor options
+    "editor.renderWhitespace": "boundary",
+    "editor.formatOnSave": true,
+    "editor.formatOnType": true,
+    "editor.rulers": [
+        116
+    ],
+    // powershell general
+    "powershell.startAutomatically": true,
+    "powershell.useX86Host": false,
+    "powershell.enableProfileLoading": true,
+    "powershell.scriptAnalysis.enable": true,
+    // powershell code Formatting
+    "powershell.codeFormatting.openBraceOnSameLine": true,
+    "powershell.codeFormatting.newLineAfterOpenBrace": true,
+    "powershell.codeFormatting.newLineAfterCloseBrace": true,
+    "powershell.codeFormatting.whitespaceBeforeOpenBrace": true,
+    "powershell.codeFormatting.whitespaceBeforeOpenParen": true,
+    "powershell.codeFormatting.whitespaceAroundOperator": true,
+    "powershell.codeFormatting.whitespaceAfterSeparator": true,
+    "powershell.codeFormatting.ignoreOneLineBlock": true,
+    "powershell.codeFormatting.alignPropertyValuePairs": false,
+    // cspell spellchecker options
+    "cSpell.enabledLanguageIds": [
+        "c",
+        "cpp",
+        "csharp",
+        "go",
+        "javascript",
+        "javascriptreact",
+        "json",
+        "latex",
+        "markdown",
+        "php",
+        "plaintext",
+        "powershell",
+        "python",
+        "text",
+        "typescript",
+        "typescriptreact",
+        "yml"
+    ]
+}
diff --git a/appveyor.yml b/appveyor.yml
new file mode 100644
index 0000000..4b42772
--- /dev/null
+++ b/appveyor.yml
@@ -0,0 +1,54 @@
+version: 0.1.{build}
+
+branches:
+  only:
+    - master
+    - dev
+    - debug
+
+skip_tags: true
+
+#image: WMF 5
+# Test ne build image:
+image: Visual Studio 2017
+
+# Install pester module and init the Appveyor support.
+install:
+  - ps: Install-PackageProvider -Name NuGet -MinimumVersion '2.8.5.201' -Force -Verbose
+  - ps: Import-PackageProvider NuGet -MinimumVersion '2.8.5.201' -Force
+#  - ps: Install-Module -Name 'Pester' -Scope CurrentUser -Force -SkipPublisherCheck -AllowClobber
+#  - ps: Update-Module 'Pester'
+#  - ps: Install-Module -Name 'posh-git' -Scope CurrentUser -Force -SkipPublisherCheck -AllowClobber
+#  - ps: Update-Module 'posh-git'
+  - ps: Import-Module .\tools\AppVeyor.psm1
+
+environment:
+  NuGetToken:
+    secure: 835qfZIkC9mE7QhkYfOZVAdR8rZhPvxG8BO4CbeaelRQOhlqmaSr8G1DWRJzZ/bS
+  CoverallsToken:
+    secure: eTjWqHL48MBr8wp1rSgLrXHdtpfDV/uClacP3svlWJfCvn/zVokpuaMnWM5RoyIY
+
+build: false
+
+before_build:
+  - ps: Invoke-AppVeyorBumpVersion
+
+build_script:
+  - ps: Invoke-AppVeyorBuild
+
+test_script:
+  - ps: Invoke-AppVeyorTests
+  - ps: Invoke-CoverageReport
+
+deploy:
+  - provider: GitHub
+    auth_token:
+      secure: M+bBX5/nKdJB0eViP7xtrLVTwf3vGDUA9N2MMprZp2i+9ZR3CBVcJnSzJWUmalhB
+    artifact: PSCredentialStore.zip           # upload all NuGet packages to release assets
+    draft: false
+    prerelease: false
+    on:
+      branch: master                # release from master branch only
+
+after_deploy:
+  - ps: Invoke-AppVeyorPSGallery
diff --git a/bin/.gitignore b/bin/.gitignore
new file mode 100644
index 0000000..7756187
--- /dev/null
+++ b/bin/.gitignore
@@ -0,0 +1 @@
+This is a placeholder file. The build Server will create all bin files here.
diff --git a/resources/.gitignore b/resources/.gitignore
new file mode 100644
index 0000000..e69de29
diff --git a/resources/cs/Broken_CS.json b/resources/cs/Broken_CS.json
new file mode 100644
index 0000000..23e8eee
--- /dev/null
+++ b/resources/cs/Broken_CS.json
@@ -0,0 +1,3 @@
+{
+    "Version":  "1.2.0",
+    "Creation":  "2016-06-14 08:41:10"
diff --git a/resources/cs/Challenge.bin b/resources/cs/Challenge.bin
new file mode 100644
index 0000000..3b80551
--- /dev/null
+++ b/resources/cs/Challenge.bin
@@ -0,0 +1 @@
+!���p���H4���"=w��S�2

\ No newline at end of file
diff --git a/resources/cs/CredentialStore.json b/resources/cs/CredentialStore.json
new file mode 100644
index 0000000..4d45b38
Binary files /dev/null and b/resources/cs/CredentialStore.json differ
diff --git a/src/PSCredentialStore.psd1 b/src/PSCredentialStore.psd1
new file mode 100644
index 0000000..8900b1b
--- /dev/null
+++ b/src/PSCredentialStore.psd1
@@ -0,0 +1,123 @@
+#
+# Module manifest for module 'PSCredentialStore'
+#
+# Generated by: OCram85
+#
+# Generated on: 27.07.2017
+#
+
+@{
+
+    # Script module or binary module file associated with this manifest.
+    # RootModule = ''
+
+    # Version number of this module.
+    ModuleVersion = '1.0'
+
+    # Supported PSEditions
+    # CompatiblePSEditions = @()
+
+    # ID used to uniquely identify this module
+    GUID = '6800e192-9df8-4e30-b253-eb2c799bbe84'
+
+    # Author of this module
+    Author = 'OCram85'
+
+    # Company or vendor of this module
+    CompanyName = 'Unknown'
+
+    # Copyright statement for this module
+    Copyright = '(c) 2017 OCram85. All rights reserved.'
+
+    # Description of the functionality provided by this module
+    # Description = ''
+
+    # Minimum version of the Windows PowerShell engine required by this module
+    # PowerShellVersion = ''
+
+    # Name of the Windows PowerShell host required by this module
+    # PowerShellHostName = ''
+
+    # Minimum version of the Windows PowerShell host required by this module
+    # PowerShellHostVersion = ''
+
+    # Minimum version of Microsoft .NET Framework required by this module. This prerequisite is valid for the PowerShell Desktop edition only.
+    # DotNetFrameworkVersion = ''
+
+    # Minimum version of the common language runtime (CLR) required by this module. This prerequisite is valid for the PowerShell Desktop edition only.
+    # CLRVersion = ''
+
+    # Processor architecture (None, X86, Amd64) required by this module
+    # ProcessorArchitecture = ''
+
+    # Modules that must be imported into the global environment prior to importing this module
+    # RequiredModules = @()
+
+    # Assemblies that must be loaded prior to importing this module
+    # RequiredAssemblies = @()
+
+    # Script files (.ps1) that are run in the caller's environment prior to importing this module.
+    # ScriptsToProcess = @()
+
+    # Type files (.ps1xml) to be loaded when importing this module
+    # TypesToProcess = @()
+
+    # Format files (.ps1xml) to be loaded when importing this module
+    # FormatsToProcess = @()
+
+    # Modules to import as nested modules of the module specified in RootModule/ModuleToProcess
+    # NestedModules = @()
+
+    # Functions to export from this module, for best performance, do not use wildcards and do not delete the entry, use an empty array if there are no functions to export.
+    FunctionsToExport = @()
+
+    # Cmdlets to export from this module, for best performance, do not use wildcards and do not delete the entry, use an empty array if there are no cmdlets to export.
+    CmdletsToExport = @()
+
+    # Variables to export from this module
+    VariablesToExport = '*'
+
+    # Aliases to export from this module, for best performance, do not use wildcards and do not delete the entry, use an empty array if there are no aliases to export.
+    AliasesToExport = @()
+
+    # DSC resources to export from this module
+    # DscResourcesToExport = @()
+
+    # List of all modules packaged with this module
+    # ModuleList = @()
+
+    # List of all files packaged with this module
+    # FileList = @()
+
+    # Private data to pass to the module specified in RootModule/ModuleToProcess. This may also contain a PSData hashtable with additional module metadata used by PowerShell.
+    PrivateData = @{
+
+        PSData = @{
+
+            # Tags applied to this module. These help with module discovery in online galleries.
+            # Tags = @()
+
+            # A URL to the license for this module.
+            # LicenseUri = ''
+
+            # A URL to the main website for this project.
+            # ProjectUri = ''
+
+            # A URL to an icon representing this module.
+            # IconUri = ''
+
+            # ReleaseNotes of this module
+            # ReleaseNotes = ''
+
+        } # End of PSData hashtable
+
+    } # End of PrivateData hashtable
+
+    # HelpInfo URI of this module
+    # HelpInfoURI = ''
+
+    # Default prefix for commands exported from this module. Override the default prefix using Import-Module -Prefix.
+    # DefaultCommandPrefix = ''
+
+}
+
diff --git a/tests/.gitignore b/tests/.gitignore
new file mode 100644
index 0000000..e69de29
diff --git a/tools/AppVeyor.psm1 b/tools/AppVeyor.psm1
new file mode 100644
index 0000000..4026add
--- /dev/null
+++ b/tools/AppVeyor.psm1
@@ -0,0 +1,178 @@
+<#
+    Define the callsign of you PowerShell Module.
+    Callsign is used to identity:
+    - Module Manifest file name
+    - Artifact File
+    - Git repository name
+    - Module name
+#>
+$CALLSIGN = 'PSCoverage'
+Write-Host ("Callsign is: {0}" -f $CALLSIGN) -ForegroundColor Yellow
+
+Function Invoke-AppVeyorBumpVersion() {
+    [CmdletBinding()]
+    Param()
+
+    Write-Host "Listing Env Vars for debugging:" -ForegroundColor Yellow
+    # Filter Results to prevent exposing secure vars.
+    Get-ChildItem -Path "Env:*" | Where-Object { $_.name -notmatch "(NuGetToken|CoverallsToken)"} | Sort-Object -Property Name | Format-Table
+
+    Try {
+        $ModManifest = Get-Content -Path (".\src\{0}.psd1" -f $CALLSIGN)
+        $BumpedManifest = $ModManifest -replace '\$Env:APPVEYOR_BUILD_VERSION', "'$Env:APPVEYOR_BUILD_VERSION'"
+        Remove-Item -Path (".\src\{0}.psd1" -f $CALLSIGN)
+        Out-File -FilePath (".\src\{0}.psd1" -f $CALLSIGN) -InputObject $BumpedManifest -NoClobber -Encoding utf8 -Force
+    }
+    Catch {
+        $MsgParams = @{
+            Message = 'Could not bump current version into module manifest.'
+            Category = 'Error'
+            Details = $_.Exception.Message
+        }
+        Add-AppveyorMessage @MsgParams
+        Throw $MsgParams.Message
+    }
+}
+
+Function Invoke-AppVeyorBuild() {
+    [CmdletBinding()]
+    Param()
+    $MsgParams = @{
+        Message = 'Creating build artifacts'
+        Category = 'Information'
+        Details = 'Extracting source files and compressing them into zip file.'
+    }
+    Add-AppveyorMessage @MsgParams
+    $CompParams = @{
+        Path = "{0}\src\*" -f $env:APPVEYOR_BUILD_FOLDER
+        DestinationPath = "{0}\bin\{1}.zip" -f $env:APPVEYOR_BUILD_FOLDER, $CALLSIGN
+        Update = $True
+        Verbose = $True
+    }
+    Compress-Archive @CompParams
+    $MsgParams = @{
+        Message = 'Pushing artifacts'
+        Category = 'Information'
+        Details = 'Pushing artifacts to AppVeyor store.'
+    }
+    Add-AppveyorMessage @MsgParams
+    Push-AppveyorArtifact (".\bin\{0}.zip" -f $CALLSIGN)
+}
+
+Function Invoke-AppVeyorTests() {
+    [CmdletBinding()]
+    Param()
+
+    $MsgParams = @{
+        Message = 'Starting Pester tests'
+        Category = 'Information'
+        Details = 'Now running all test found in .\tests\ dir.'
+    }
+    Add-AppveyorMessage @MsgParams
+    $testresults = Invoke-Pester -Path ".\tests\*" -ExcludeTag 'Disabled' -PassThru
+    ForEach ($Item in $testresults.TestResult) {
+        Switch ($Item.Result) {
+            "Passed" {
+                $TestParams = @{
+                    Name = "{0}: {1}" -f $Item.Context, $Item.Name
+                    Framework = "NUnit"
+                    Filename = $Item.Describe
+                    Outcome = "Passed"
+                    Duration = $Item.Time.Milliseconds
+                }
+                Add-AppveyorTest @TestParams
+            }
+            "Failed" {
+                $TestParams = @{
+                    Name = "{0}: {1}" -f $Item.Context, $Item.Name
+                    Framework = "NUnit"
+                    Filename = $Item.Describe
+                    Outcome = "Failed"
+                    Duration = $Item.Time.Milliseconds
+                    ErrorMessage = $Item.FailureMessage
+                    ErrorStackTrace = $Item.StackTrace
+                }
+                Add-AppveyorTest @TestParams
+            }
+            Default {
+                $TestParams = @{
+                    Name = "{0}: {1}" -f $Item.Context, $Item.Name
+                    Framework = "NUnit"
+                    Filename = $Item.Describe
+                    Outcome = "None"
+                    Duration = $Item.Time.Milliseconds
+                    ErrorMessage = $Item.FailureMessage
+                    ErrorStackTrace = $Item.StackTrace
+                }
+                Add-AppveyorTest @TestParams
+            }
+        }
+    }
+    If ($testresults.FailedCount -gt 0) {
+        $MsgParams = @{
+            Message = 'Pester Tests failed.'
+            Category = 'Error'
+            Details = "$($testresults.FailedCount) tests failed."
+        }
+        Add-AppveyorMessage @MsgParams
+        Throw $MsgParams.Message
+    }
+
+}
+
+Function Invoke-CoverageReport() {
+    [CmdletBinding()]
+    Param(
+        [Parameter(Mandatory = $False)]
+        [ValidateNotNullOrEmpty()]
+        [String]$RepoToken = $Env:CoverallsToken
+    )
+
+    Import-Module '.\src\PSCoverage.psm1' -Verbose -Force
+    $FileMap = New-PesterFileMap -SourceRoot '.\src' -PesterRoot '.\tests'
+    $CoverageReport = New-CoverageReport -PesterFileMap $FileMap -RepoToken $RepoToken
+    Write-Host "CoverageReport JSON:" -ForegroundColor Yellow
+    $CoverageReport | Out-String | Write-Host
+    Publish-CoverageReport -CoverageReport $CoverageReport
+}
+
+Function Invoke-AppVeyorPSGallery() {
+    [CmdletBinding()]
+    Param()
+    Expand-Archive -Path (".\bin\{0}.zip" -f $CALLSIGN) -DestinationPath ("C:\Users\appveyor\Documents\WindowsPowerShell\Modules\{0}\" -f $CALLSIGN) -Verbose
+    Import-Module -Name $CALLSIGN -Verbose -Force
+    Write-Host "Available Package Provider:" -ForegroundColor Yellow
+    Get-PackageProvider -ListAvailable
+    Write-Host "Available Package Sources:" -ForegroundColor Yellow
+    Get-PackageSource
+    Try {
+        Write-Host "Try to get NuGet Provider:" -ForegroundColor Yellow
+        Get-PackageProvider -Name NuGet -ErrorAction Stop
+    }
+    Catch {
+        Write-Host "Installing NuGet..." -ForegroundColor Yellow
+        Install-PackageProvider -Name NuGet -MinimumVersion '2.8.5.201' -Force -Verbose
+        Import-PackageProvider NuGet -MinimumVersion '2.8.5.201' -Force
+    }
+    Try {
+        If ($env:APPVEYOR_REPO_BRANCH -eq 'master') {
+            Write-Host "try to publish module" -ForegroundColor Yellow
+            Write-Host ("Callsign is: {0}" -f $CALLSIGN) -ForegroundColor Yellow
+            Publish-Module -Name $CALLSIGN -NuGetApiKey $env:NuGetToken -Verbose -Force
+        }
+        Else {
+            Write-Host "Skip publishing to PS Gallery because we are on $($env:APPVEYOR_REPO_BRANCH) branch." -ForegroundColor Yellow
+            # had to remove the publish-Module statement because it would publish although the -WhatIf is given.
+            # Publish-Module -Name $CALLSIGN -NuGetApiKey $env:NuGetToken -Verbose -WhatIf
+        }
+    }
+    Catch {
+        $MsgParams = @{
+            Message = 'Could not deploy module to PSGallery.'
+            Category = 'Error'
+            Details = $_.Exception.Message
+        }
+        Add-AppveyorMessage @MsgParams
+        Throw $MsgParams.Message
+    }
+}