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Manipulative Online-Inhalte, unvollst\u00e4ndige oder falsche Angaben sowie irref\u00fchrende Werbung sind fl\u00fcchtig, leicht ver\u00e4nderbar und daher nur schwer beweiskr\u00e4ftig zu sichern. Herk\u00f6mmliche Verfahren wie Screenshots sind unzureichend, da sie durch Bildbearbeitung oder minimale \u00c4nderungen im Quelltext leicht manipuliert werden k\u00f6nnen. In diesem Beitrag wird ein hybrides technisches System vorgestellt, das eine zuverl\u00e4ssige und manipulationssichere Beweissicherung solcher Verst\u00f6\u00dfe erm\u00f6glicht. Der Ansatz kombiniert Distributed-Ledger-Technologie (DLT) zur Integrit\u00e4tssicherung der erfassten Daten mit einer verifizierenden Crowd-Absicherung durch Fachpersonal der Verbraucherzentralen. Die L\u00f6sung erlaubt es, erkannte Rechtsverst\u00f6\u00dfe automatisiert zu erfassen, indem ein Hashwert des Webseiteninhalts erzeugt und zusammen mit Metadaten und Zeitstempel in einem DLT-System unver\u00e4nderbar gespeichert wird. Erg\u00e4nzend best\u00e4tigen Arbeitsplatzrechner von Verbraucherschutzmitarbeitenden durch ein automatisiertes paralleles Vorgehen die Existenz der Verst\u00f6\u00dfe, ohne dass aktives Eingreifen erforderlich ist. Dieses Verfahren st\u00e4rkt den Beweiswert, erh\u00f6ht die Widerstandsf\u00e4higkeit gegen Manipulation und erm\u00f6glicht es, nachgelagerte Ver\u00e4nderungen oder L\u00f6schungen gerichtsfest nachzuweisen.<\/jats:p>","DOI":"10.1365\/s40702-026-01249-0","type":"journal-article","created":{"date-parts":[[2026,2,23]],"date-time":"2026-02-23T12:43:44Z","timestamp":1771850624000},"page":"488-508","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Digitale Beweissicherung im Verbraucherschutz: Eine DLT-basierte L\u00f6sung mit Crowd-Verifikation","Digital Evidence Preservation in Consumer Protection: A DLT-Based Solution with Crowd Verification"],"prefix":"10.1365","volume":"63","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3747-4229","authenticated-orcid":false,"given":"Meike","family":"Ullrich","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-4542-4903","authenticated-orcid":false,"given":"Nadja","family":"Kruse","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4436-4992","authenticated-orcid":false,"given":"Gunther","family":"Schiefer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-5302-667X","authenticated-orcid":false,"given":"Zina","family":"Al-Washash","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0004-9328-3843","authenticated-orcid":false,"given":"Steffen","family":"Kroschwald","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9539-1627","authenticated-orcid":false,"given":"Thomas","family":"Schuster","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"93","published-online":{"date-parts":[[2026,2,23]]},"reference":[{"key":"1249_CR1","series-title":"arXiv preprint","volume-title":"A systematic literature review of the tension between the GDPR and public blockchain systems","author":"R Belen-Saglam","year":"2022","unstructured":"Belen-Saglam\u00a0R, Garc\u00eda-Ba\u00f1uelos\u00a0L, Matulevi\u010dius\u00a0R (2022) A systematic literature review of the tension between the GDPR and public blockchain systems. arXiv preprint"},{"key":"1249_CR2","unstructured":"BGH (2023) Beschluss vom 10. 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