@inproceedings{MuellerBrinkmannPoddebniaketal.2020,
  author    = {M{\"u}ller, Jens and Brinkmann, Marcus and Poddebniak, Damian and Schinzel, Sebastian and Schwenk, J{\"o}rg},
  title     = {Mailto: Me Your Secrets. On Bugs and Features in Email End-to-End Encryption},
  series = {2020 IEEE Conference on Communications and Network Security (CNS)},
  booktitle = {2020 IEEE Conference on Communications and Network Security (CNS)},
  doi       = {10.1109/CNS48642.2020.9162218},
  pages     = {1 -- 9},
  year      = {2020},
  abstract  = {OpenPGP and S/MIME are the two major standards for email end-to-end encryption. We show practical attacks against both encryption schemes in the context of email. First, we present a design flaw in the key update mechanism, allowing a third party to deploy a new key to the communication partners. Second, we show how email clients can be tricked into acting as an oracle for decryption or signing by exploiting their functionality to auto-save drafts. Third, we demonstrate how to exfiltrate the private key, based on proprietary mailto parameters implemented by various email clients. An evaluation shows that 8 out of 20 tested email clients are vulnerable to at least one attack. While our attacks do not target the underlying cryptographic primitives, they raise concerns about the practical security of OpenPGP and S/MIME email applications. Finally, we propose countermeasures and discuss their advantages and disadvantages.},
  language  = {de}
}
@book{SandkerNonhoff1999,
  author    = {Sandker, Holger and Nonhoff, J{\"u}rgen},
  title     = {Going Online mit Sicherheit},
  publisher = {FH M{\"u}nster},
  doi       = {10.25974/fhms-26},
  url       = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-267},
  publisher      = {FH M{\"u}nster - University of Applied Sciences},
  year      = {1999},
  abstract  = {Die Literatur rund um das Thema Datenverschl{\"u}sselung und PGP ist knapp und meist rein auf das Thema Verschl{\"u}sselung oder auf die alte PGP-Version 2.6.3 beschr{\"a}nkt. Dieses Buch stellt daher eine Verbindung her zwischen den PGP zugrunde liegenden Verschl{\"u}sselungsverfahren und der Anwendung der aktuellen PGP Version 5.5. Es richtet sich in erster Linie an Anwender, die PGP erstmals in betrieblicher Umgebung einsetzen m{\"o}chten.},
  subject      = {Public-Key-Kryptosystem},
  language  = {de}
}