Editing Cypherpunk anonymous remailer (section)

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'''A Cypherpunk [[anonymous remailer]]''', also known as a Type I remailer, is a type of [[anonymous remailer]] that receives messages encrypted with [[Pretty Good Privacy|PGP]] or [[GNU Privacy Guard|GPG]], follows predetermined instructions to strip any identifying information, and forwards the messages to the desired recipient.<ref>{{Cite web |title=Anonymous Remailers |url=https://mason.gmu.edu/~afinn/html/tele/components/anonymous_remailers.htm |access-date=2023-12-11 |website=mason.gmu.edu}}</ref>

Cypherpunk anonymous remailers are vulnerable to [[Traffic analysis|traffic analysis attacks]], which take advantage of the predictable order in which messages are sent to recipients. This predictability can potentially reveal the identity of the sender. To address this weakness, Type II and Type III remailers were developed.<ref>{{Cite web |last=Van Oorschot |first=Paul C. |date=2 March 2023 |title=Anonymous remailers + secure email |url=https://people.scs.carleton.ca/~paulv/anonRemailerNotes.pdf |archive-url=https://web.archive.org/web/20231231022203/https://people.scs.carleton.ca/~paulv/anonRemailerNotes.pdf |archive-date=2023-12-31}}</ref> Prior to the introduction of [[Mixmaster anonymous remailer|Mixmaster]] (Type II) remailers, users attempted to mitigate this issue by sending messages in batches<ref>Anonymous Remailers. (n.d.). Retrieved August 10, 2023, from [https://mason.gmu.edu/~afinn/html/tele/components/anonymous_remailers.htm]{{Webarchive|url=https://web.archive.org/web/20210924022208/http://mason.gmu.edu/~afinn/html/tele/components/anonymous_remailers.htm|date=2021-09-24}}</ref> or by using multiple remailers in sequence to further obscure the sender's identity.<ref>Remailers: Send Emails without Registration. (n.d.). Retrieved August 10, 2023, from [https://www.whonix.org/wiki/Remailer#Cypherpunk_Remailer]{{Webarchive|url=https://web.archive.org/web/20230609191143/https://www.whonix.org/wiki/Remailer#Cypherpunk_Remailer|date=2023-06-09}}</ref>

Mixmaster remailers were built upon the technology of Cypherpunk remailers, rendering the latter [[wiktionary:obsolescent|obsolescent]].<ref>Winkler, S., & Zeadally, S. (2015). An analysis of tools for online anonymity. International Journal of Pervasive Computing and Communications, 11(4), 436–453. [https://doi.org/10.1108/IJPCC-08-2015-0030]{{Webarchive|url=https://web.archive.org/web/20230813203517/https://www.emerald.com/insight/content/doi/10.1108/IJPCC-08-2015-0030/full/html|date=2023-08-13}}</ref> However, there are still websites and systems which rely on the general ideas of layered encryption and identity obfuscation behind Type I remailers.<ref>{{Cite web |last=Lutkevich |first=Ben |date=April 2021 |title=What is Obfuscation? |url=https://www.techtarget.com/searchsecurity/definition/obfuscation}}</ref>