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the claim

Leone Battista Alberti invented the polyalphabetic cipher around 1467.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
7 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

AS REPORTEDno primary record reached; this is what the reporting says

Is it true that Leone Battista Alberti invented the polyalphabetic cipher around 1467?

Yes. Multiple historical sources confirm that Leone Battista Alberti is credited with inventing the polyalphabetic cipher around 1467.

Verdict: SUPPORTED · 7 sources for, 0 against · Last checked

How claims like this are judged

Judged against reference works: claims of this kind are settled by the historical reference record, not journal abstracts.

Evidence for · 7
Wikipedia: Leon Battista Alberti
Reference article covering this claim directly
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Wikipedia: Leon Battista Alberti. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Leon_Battista_Alberti

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More for · 6
LibreTexts: LibreTexts: 5.3: A Bit of History
States the polyalphabetic cipher was developed most clearly by Leon Battista Alberti around 1467.
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LibreTexts: LibreTexts: 5.3%3A A Bit of History. (n.d.). LibreTexts. https://eng.libretexts.org/Courses/Delta_College/Information_Security/5%3A_Cryptography/5.3%3A_A_Bit_of_History

Wikibooks: Wikibooks: Cryptography/Print version
States Leone Battista Alberti invents polyalphabetic cipher around 1466.
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Wikibooks: Wikibooks: Cryptography/Print version. (n.d.). Wikibooks. https://en.wikibooks.org/wiki/Cryptography/Print_version

Wikipedia: Wikipedia: Polyalphabetic cipher
Notes the Alberti cipher by Leon Battista Alberti around 1467 was an early polyalphabetic cipher.
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Wikipedia: Wikipedia: Polyalphabetic cipher. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Polyalphabetic_cipher

Simple English Wikipedia: Simple English Wikipedia: 1467
Lists the invention of the polyalphabetic cipher by Leone Battista Alberti circa 1467.
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Simple English Wikipedia: Simple English Wikipedia: 1467. (n.d.). Simple English Wikipedia. https://simple.wikipedia.org/wiki/1467

Wikibooks: Wikibooks: Cryptography/Timeline of Notable Events
States Leone Battista Alberti invents polyalphabetic cipher.
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Wikibooks: Wikibooks: Cryptography/Timeline of Notable Events. (n.d.). Wikibooks. https://en.wikibooks.org/wiki/Cryptography/Timeline_of_Notable_Events

Wikipedia: Wikipedia: List of cryptographers
Identifies Leone Battista Alberti as the inventor of polyalphabetic substitution.
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Wikipedia: Wikipedia: List of cryptographers. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/List_of_cryptographers

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