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diff --git a/images/metadata.txt b/images/metadata.txt
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+++ b/images/metadata.txt
@@ -0,0 +1,201 @@
+ExifTool Version Number         : 13.30
+File Name                       : img.HEIC
+Directory                       : .
+File Size                       : 3.4 MB
+File Modification Date/Time     : 2025:08:26 12:33:40+02:00
+File Access Date/Time           : 2025:08:26 12:33:45+02:00
+File Inode Change Date/Time     : 2025:08:26 12:33:44+02:00
+File Permissions                : -rw-r--r--
+File Type                       : HEIC
+File Type Extension             : heic
+MIME Type                       : image/heic
+Major Brand                     : High Efficiency Image Format HEVC still image (.HEIC)
+Minor Version                   : 0.0.0
+Compatible Brands               : mif1, MiHE, miaf, MiHB, heic
+Handler Type                    : Picture
+Primary Item Reference          : 49
+Meta Image Size                 : 4032x3024 0 515 2016 1512
+Exif Byte Order                 : Big-endian (Motorola, MM)
+Make                            : Apple
+Camera Model Name               : iPhone 12 mini
+Orientation                     : Horizontal (normal)
+X Resolution                    : 72
+Y Resolution                    : 72
+Resolution Unit                 : inches
+Software                        : 26.0
+Modify Date                     : 2025:08:01 16:13:23
+Host Computer                   : iPhone 12 mini
+Tile Width                      : 512
+Tile Length                     : 512
+Exposure Time                   : 1/3861
+F Number                        : 1.6
+Exposure Program                : Program AE
+ISO                             : 32
+Exif Version                    : 0232
+Date/Time Original              : 2025:08:01 16:13:23
+Create Date                     : 2025:08:01 16:13:23
+Offset Time                     : +02:00
+Offset Time Original            : +02:00
+Offset Time Digitized           : +02:00
+Shutter Speed Value             : 1/3861
+Aperture Value                  : 1.6
+Brightness Value                : 9.930983065
+Exposure Compensation           : 0
+Metering Mode                   : Multi-segment
+Flash                           : Off, Did not fire
+Focal Length                    : 4.2 mm
+Subject Area                    : 2014 1512 2218 1394
+Maker Note Version              : 16
+Run Time Flags                  : Valid
+Run Time Value                  : 326134140304416
+Run Time Scale                  : 1000000000
+Run Time Epoch                  : 0
+AE Stable                       : Yes
+AE Target                       : 176
+AE Average                      : 178
+AF Stable                       : Yes
+Acceleration Vector             : -0.991356015 -0.02970843391 -0.1020536497
+Focus Distance Range            : 0.62 - 5.15 m
+Image Capture Type              : Photo
+Live Photo Video Index          : 1112547328
+Photos App Feature Flags        : 0
+HDR Headroom                    : 1.568873048
+AF Performance                  : 109 1 31
+Signal To Noise Ratio           : 60.7280693
+Photo Identifier                : 0655A9CD-C495-435F-A01B-A62A98C6EA13
+Color Temperature               : 5422
+Camera Type                     : Back Normal
+Focus Position                  : 49
+HDR Gain                        : 0
+Sub Sec Time Original           : 564
+Sub Sec Time Digitized          : 564
+Color Space                     : Uncalibrated
+Exif Image Width                : 4032
+Exif Image Height               : 3024
+Sensing Method                  : One-chip color area
+Scene Type                      : Directly photographed
+Exposure Mode                   : Auto
+White Balance                   : Auto
+Focal Length In 35mm Format     : 26 mm
+Lens Info                       : 1.549999952-4.2mm f/1.6-2.4
+Lens Make                       : Apple
+Lens Model                      : iPhone 12 mini back dual wide camera 4.2mm f/1.6
+Composite Image                 : General Composite Image
+GPS Latitude Ref                : North
+GPS Longitude Ref               : East
+GPS Time Stamp                  : 14:13:01
+GPS Speed Ref                   : km/h
+GPS Speed                       : 0
+GPS Img Direction Ref           : Magnetic North
+GPS Img Direction               : 89.15356445
+GPS Dest Bearing Ref            : Magnetic North
+GPS Dest Bearing                : 89.15356445
+GPS Date Stamp                  : 2025:08:01
+GPS Horizontal Positioning Error: 5385.512712 m
+XMP Toolkit                     : XMP Core 6.0.0
+Creator Tool                    : 26.0
+Date Created                    : 2025:08:01 16:13:23
+HDR Gain Map Version            : 0.1.0.0
+Profile CMM Type                : Apple Computer Inc.
+Profile Version                 : 4.0.0
+Profile Class                   : Display Device Profile
+Color Space Data                : RGB
+Profile Connection Space        : XYZ
+Profile Date Time               : 2022:01:01 00:00:00
+Profile File Signature          : acsp
+Primary Platform                : Apple Computer Inc.
+CMM Flags                       : Not Embedded, Independent
+Device Manufacturer             : Apple Computer Inc.
+Device Model                    : 
+Device Attributes               : Reflective, Glossy, Positive, Color
+Rendering Intent                : Perceptual
+Connection Space Illuminant     : 0.9642 1 0.82491
+Profile Creator                 : Apple Computer Inc.
+Profile ID                      : ecfda38e388547c36db4bd4f7ada182f
+Profile Description             : Display P3
+Profile Copyright               : Copyright Apple Inc., 2022
+Media White Point               : 0.96419 1 0.82489
+Red Matrix Column               : 0.51512 0.2412 -0.00105
+Green Matrix Column             : 0.29198 0.69225 0.04189
+Blue Matrix Column              : 0.1571 0.06657 0.78407
+Red Tone Reproduction Curve     : (Binary data 32 bytes, use -b option to extract)
+Chromatic Adaptation            : 1.04788 0.02292 -0.0502 0.02959 0.99048 -0.01706 -0.00923 0.01508 0.75168
+Blue Tone Reproduction Curve    : (Binary data 32 bytes, use -b option to extract)
+Green Tone Reproduction Curve   : (Binary data 32 bytes, use -b option to extract)
+Max Content Light Level         : 203
+Max Pic Average Light Level     : 64
+Image Width                     : 4032
+Image Height                    : 3024
+Image Spatial Extent            : 4032x3024
+Rotation                        : Horizontal (Normal)
+Image Pixel Depth               : 8 8 8
+Profile Description ML (sk-SK)  : Všeobecná sivá gama 2,2
+Profile Description ML (da-DK)  : Generisk grå 2,2 gamma-profil
+Profile Description ML (ca-ES)  : Gamma de grisos genèrica 2.2
+Profile Description ML (vi-VN)  : Cấu hình Màu xám Chung Gamma 2.2
+Profile Description ML (pt-BR)  : Perfil Genérico da Gama de Cinzas 2,2
+Profile Description ML (uk-UA)  : Загальна Gray-гама 2.2
+Profile Description ML (fr-FU)  : Profil générique gris gamma 2,2
+Profile Description ML (hu-HU)  : Általános szürke gamma 2.2
+Profile Description ML (zh-TW)  : 通用灰階光度2.2色彩描述
+Profile Description ML (ko-KR)  : 일반 회색 감마 2.2 프로파일
+Profile Description ML (nb-NO)  : Generisk grå gamma 2,2-profil
+Profile Description ML (cs-CZ)  : Obecná šedá gama 2.2
+Profile Description ML (he-IL)  : גאמה אפור כללי 2.2
+Profile Description ML (ro-RO)  : Gama gri generică 2,2
+Profile Description ML (de-DE)  : Allgemeines Graustufen-Profil Gamma 2,2
+Profile Description ML (it-IT)  : Profilo grigio generico della gamma 2,2
+Profile Description ML (sv-SE)  : Generisk grå 2,2 gammaprofil
+Profile Description ML (zh-CN)  : 普通灰度系数2.2描述文件
+Profile Description ML (ja-JP)  : 一般グレイガンマ 2.2 プロファイル
+Profile Description ML (el-GR)  : Γενικό Γκρι Γάμμα 2.2
+Profile Description ML (pt-PO)  : Perfil genérico de cinzentos da Gamma 2,2
+Profile Description ML (nl-NL)  : Algemeen grijs gamma 2,2-profiel
+Profile Description ML (es-ES)  : Perfil genérico de gamma de grises 2,2
+Profile Description ML (th-TH)  : รังสีแกมมาเกรย์ทั่วไป 2.2
+Profile Description ML (tr-TR)  : Genel Gri Gama 2,2
+Profile Description ML (fi-FI)  : Yleinen harmaan gamma 2,2 -profiili
+Profile Description ML (hr-HR)  : Generički Gray Gamma 2.2 profil
+Profile Description ML (pl-PL)  : Uniwersalny profil szarości gamma 2,2
+Profile Description ML (ar-EG)  : غاما 2.2 لون رمادي عام
+Profile Description ML (ru-RU)  : Общая серая гамма 2,2-профиль
+Profile Description ML          : Generic Gray Gamma 2.2 Profile
+Gray Tone Reproduction Curve    : (Binary data 2060 bytes, use -b option to extract)
+Auxiliary Image Type            : urn:com:apple:photo:2020:aux:hdrgainmap
+HEVC Configuration Version      : 1
+General Profile Space           : Conforming
+General Tier Flag               : Main Tier
+General Profile IDC             : Main Still Picture
+Gen Profile Compatibility Flags : Main Still Picture, Main 10, Main
+Constraint Indicator Flags      : 176 0 0 0 0 0
+General Level IDC               : 90 (level 3.0)
+Min Spatial Segmentation IDC    : 0
+Parallelism Type                : 0
+Chroma Format                   : 4:2:0
+Bit Depth Luma                  : 8
+Bit Depth Chroma                : 8
+Average Frame Rate              : 0
+Constant Frame Rate             : Unknown
+Num Temporal Layers             : 1
+Temporal ID Nested              : No
+Media Data Size                 : 3342260
+Media Data Offset               : 8768
+Run Time Since Power Up         : 3 days 18:35:34
+Aperture                        : 1.6
+Image Size                      : 4032x3024
+Megapixels                      : 12.2
+Scale Factor To 35 mm Equivalent: 6.2
+Shutter Speed                   : 1/3861
+Create Date                     : 2025:08:01 16:13:23.564+02:00
+Date/Time Original              : 2025:08:01 16:13:23.564+02:00
+Modify Date                     : 2025:08:01 16:13:23+02:00
+GPS Date/Time                   : 2025:08:01 14:13:01Z
+GPS Latitude                    : 53 deg 36' 0.21" N
+GPS Longitude                   : 11 deg 28' 55.14" E
+Circle Of Confusion             : 0.005 mm
+Field Of View                   : 69.4 deg
+Focal Length                    : 4.2 mm (35 mm equivalent: 26.0 mm)
+GPS Position                    : 53 deg 36' 0.21" N, 11 deg 28' 55.14" E
+Hyperfocal Distance             : 2.27 m
+Light Value                     : 14.9
+Lens ID                         : iPhone 12 mini back dual wide camera 4.2mm f/1.6
diff --git a/images/schwerin.HEIC b/images/schwerin.HEIC
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+---
+marp: true
+theme: default
+class: invert
+---
+
+# Digitale Selbstverteidigung
+
+> "Sollen Sie doch meine Daten haben. Ich hab eh nichts zu verbergen!"
+
+---
+
+## Wer wir sind
+
+- AG Link -- AG für kritische Informatik
+- Seit 2018
+- Webseite [ag-link.xyz](https://ag-link.xyz/)
+- Email [ag-link@riseup.net](mailto:ag-link@riseup.net)
+
+![invert bg right contain 65%](https://ag-link.xyz/assets/img/connection_black.png)
+
+---
+
+## Worum geht es heute
+
+- Was sind Daten?
+- Wer verwendet meine Daten?
+- Warum sollten wir bewusster mit Daten umgehen?
+- Argumente gegen "Ich hab doch eh nichts zu verbergen"
+
+---
+
+![bg](images/duckduckgo_data.png)
+
+---
+
+## Was sind Daten?
+
+> reinterpretable representation of information in a formalized manner suitable for communication, interpretation, or processing.[^1]
+
+---
+
+![bg contain](images/schwerin.jpg)
+
+---
+
+```txt
+> exiftool img.HEIC
+ExifTool Version Number         : 13.30
+File Name                       : img.HEIC
+Directory                       : .
+File Size                       : 3.4 MB
+File Modification Date/Time     : 2025:08:26 12:33:40+02:00
+File Access Date/Time           : 2025:08:26 12:33:45+02:00
+File Inode Change Date/Time     : 2025:08:26 12:33:44+02:00
+File Permissions                : -rw-r--r--
+...
+Meta Image Size                 : 4032x3024 0 515 2016 1512
+Exif Byte Order                 : Big-endian (Motorola, MM)
+Make                            : Apple
+Camera Model Name               : iPhone 12 mini
+Orientation                     : Horizontal (normal)
+...
+```
+
+---
+
+```txt
+...
+Exposure Time                   : 1/3861
+F Number                        : 1.6
+Exposure Program                : Program AE
+ISO                             : 32
+Exif Version                    : 0232
+Date/Time Original              : 2025:08:01 16:13:23
+Create Date                     : 2025:08:01 16:13:23
+Offset Time                     : +02:00
+Offset Time Original            : +02:00
+Offset Time Digitized           : +02:00
+Shutter Speed Value             : 1/3861
+Aperture Value                  : 1.6
+Brightness Value                : 9.930983065
+Exposure Compensation           : 0
+...
+Lens Info                       : 1.549999952-4.2mm f/1.6-2.4
+Lens Make                       : Apple
+Lens Model                      : iPhone 12 mini back dual wide camera 4.2mm f/1.6
+```
+
+---
+
+```txt
+...
+GPS Date/Time                   : 2025:08:01 14:13:01Z
+GPS Latitude                    : 53 deg 36' 0.21" N
+GPS Longitude                   : 11 deg 28' 55.14" E
+Circle Of Confusion             : 0.005 mm
+Field Of View                   : 69.4 deg
+Focal Length                    : 4.2 mm (35 mm equivalent: 26.0 mm)
+GPS Position                    : 53 deg 36' 0.21" N, 11 deg 28' 55.14" E
+```
+
+---
+
+![bg contain](images/loc.png)
+
+---
+
+## Wer verwendet meine Daten?
+
+- Ich
+- Freund:innen
+- Familie
+- Bekannte
+
+--- 
+
+## Wer verwendet meine Daten?[^2]
+
+- Ich
+- Freund:innen
+- Familie
+- Bekannte
+
+Aber auch
+
+- Hacker
+- Erpresser
+
+![bg right:65% contain](images/datenlecks.png) 
+
+---
+
+## Wer verwendet meine Daten?
+
+- ...
+- Konzerne[^3]
+- Regierungen
+
+---
+
+## Wofür werden meine Daten verwendet?
+
+- Konsumverhalten
+- Verkauf von Daten an andere
+- Daten machen erpressbar
+- Achtsamer Umgang mit meinen Daten ist solidarisch
+- Marginalisierung
+- Energieverbrauch durch Sammeln von Daten
+- Unachtsamer Umgang mit Daten verursacht Abhängigkeiten
+
+---
+
+# Konsumverhalten
+
+---
+
+# Verkauf von Daten 
+
+>"Wenn ein Dienst kostenlos ist, bist du das Produkt"
+
+---
+
+# Erpressbarkeit
+
+---
+
+# Solidarität
+
+---
+
+# Marginalisierung durch Daten
+
+---
+
+# Energieverbrauch
+
+---
+
+# Schaffen von Abhängigkeiten und Lock-In
+
+---
+
+# Und was kann ich jetzt dagegen tun?
+
+1. Bewussterer Umgang mit Daten. 
+2. Verwendung von Software, dessen Businessmodell nicht auf dem Sammeln von Daten ausgerichtet ist
+
+---
+
+[^1]: https://www.iso.org/obp/ui/en/#iso:std:iso-iec:2382:ed-1:v2:en
+[^2]: https://de.wikipedia.org/wiki/Liste_von_Datendiebst%C3%A4hlen
+[^3]: https://boldist.co/analytics/google-data-collection/
\ No newline at end of file
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