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→One-time pad?: should be mentioned. |
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{{WikiProject Cryptography|importance=Top|computer-science-importance=High}}
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{{Copied|from=Reciprocal cipher|from_oldid=594888807|to=Symmetric-key algorithm|to_oldid=694433513|to_diff=https://en.wikipedia.org/w/index.php?title=Symmetric-key_algorithm&diff=prev&oldid=694433513}}
==Wiki Education Foundation-supported course assignment==
[[File:Sciences humaines.svg|40px]] This article was the subject of a Wiki Education Foundation-supported course assignment, between <span class="mw-formatted-date" title="2021-08-24">24 August 2021</span> and <span class="mw-formatted-date" title="2021-12-11">11 December 2021</span>. Further details are available [[Wikipedia:Wiki_Ed/University_of_New_Haven/Seminar_in_Academic_Inquiry_and_Writing_(Fall_2021)|on the course page]]. Student editor(s): [[User:CodeBreakNight|CodeBreakNight]].
{{small|Above undated message substituted from [[Template:Dashboard.wikiedu.org assignment]] by [[User:PrimeBOT|PrimeBOT]] ([[User talk:PrimeBOT|talk]]) 10:35, 17 January 2022 (UTC)}}
==Untitled==
Re: Statement "The symmetric-key algorithms can't be used for authentication or non-repudiation purposes."
Isn't authentication possible, using a KDC?
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I am [[WP:BOLD|BOLDly]] implementing the proposed merge of [[Reciprocal cipher]] into this page ([[Symmetric-key algorithm]]) from [[Special:Diff/470191675|January 2012]], having seen no objection under [[WP:MERGECLOSE]]. Please feel free to reopen discussion on this if you think that's needed. Thanks, '''[[User:L235|L235]]''' ([[User talk:L235#top|t]] / [[Special:Contribs/L235|c]] / [[User:L235/siginfo|<small>ping in reply</small>]]) 06:11, 9 December 2015 (UTC)
:Done. '''[[User:L235|L235]]''' ([[User talk:L235#top|t]] / [[Special:Contribs/L235|c]] / [[User:L235/siginfo|<small>ping in reply</small>]]) 06:17, 9 December 2015 (UTC)
Telegramy [[User:Petridahura1|Petridahura1]] ([[User talk:Petridahura1|talk]]) 23:14, 16 October 2021 (UTC)
== Securing Local Data ==
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Isn't a one-time pad a symmetric cipher? If so it isn't mentioned here. [[User:RichardAlexanderHall|RichardAlexanderHall]] ([[User talk:RichardAlexanderHall|talk]]) 16:49, 4 August 2017 (UTC)
:Technically it is -- the keys on both sides are the same, however it is not really a practical example, since the shared secret is very large. Do you think it makes sense to use it as an example? [[User:Namnatulco|Namnatulco]] ([[User talk:Namnatulco|talk]]) 14:08, 9 August 2017 (UTC)
:: I agree that the one-time pad is a kind of symmetric cipher, and should be mentioned here. I see that it's currently very briefly mentioned. Perhaps a few more words may be useful.
:: I fail to see why [[User:Namnatulco|Namnatulco]] feels one-time pad is "not really practical", since the [[one-time pad]] article has a long list of examples of its use in practice -- clearly those users feel it is practical. --[[User:DavidCary|DavidCary]] ([[User talk:DavidCary|talk]]) 19:37, 30 July 2025 (UTC)
== About history and differences between algorithm and cryptography ==
I have a couple of sources that would give more of the history/evolution of symmetric-key cryptography. Do you think that would fit here? If not, where do you think it could go? I was wondering because symmetric-key cryptography (I believe) redirects to here.[[User:CodeBreakNight|CodeBreakNight]] ([[User talk:CodeBreakNight|talk]]) 17:14, 2 December 2021 (UTC)
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