cypher

cypher (plural cyphers)

(British spelling) Alternative spelling of cipher.
- 1814 May 9, [Jane Austen], chapter XVII, in Mansfield Park: […], volume I, London: […] [George Sidney] for T[homas] Egerton, […], →OCLC, page 337:
  Lady Bertram seems more of a cypher now than when he is at home; […]
- 2023 July 26, Christian Wolmar, “Closing ticket offices to lead to 'catch-22' for passengers”, in RAIL, number 988, page 42:
  I have been critical of the RDG in the past for merely being a cypher for government announcements, but the failure of its members to make a stand on this issue and not be complicit in the Government's subterfuge is a shocking indictment of their failure to protect the industry.

cypher (third-person singular simple present cyphers, present participle cyphering, simple past and past participle cyphered)

Less common than cipher, but still used; see The Ultra Secret by Winterbotham, the cypherpunk movement, Strider weapon, and consider the Royal Navy's series of Cyphers (Nr 1, Nr 2, Nr 3, ...) before and into WWII.

English