cryptographicaladj.
/ˌkrɪptəˈɡrafᵻkl/, U.S. /ˌkrɪptəˈɡræfək(ə)l/ Of or relating to cryptography; written in code or cipher.
ΘΚΠ
the mind > mental capacity > knowledge > secrecy, concealment > code, cipher > [adjective] > of the nature of cryptography
polygraphical1588
steganographical1588
cryptographical1653
cryptographal1663
cryptographic1790
cryptological1868
polygraphic1878
cryptologic1899
1653 J. Webster Academiarum Examen ix. 100 I should proffer some auxiliary means for the promoting of Symbolical, and Cryptographical learning, as being a part of Grammar.
1694 London Gaz. No. 2973/4 Recreations of divers Kinds, viz. Numerical, Geometrical..Horometrical, Cryptographical.
1746 W. Wood Britain's Joshua p. i A Sermon..to be only once heard, and afterwards laid to sleep, in cryptographical Sheets, secure from Criticism.
1753 Ld. Chesterfield World No. 24. ⁋12 In possession..of a more brachygraphical, cryptographical, and steganographical secret.
1817 J. Snart Thes. of Horror 161 Like many other cryptographical wonders, the moderns will see nothing in it beyond an artificial arrangement of the forty-nine natural numbers.
1896 Blackwood's Edinb. Mag. Dec. 798/2 The president next presents every member with a diploma..on the back of which the name of the holder is written in cryptographical symbols.
1901 Notes & Queries Dec. 307 It sometimes happens that the cryptographical character of epitaphs are mainly due to ‘the unlettered muse’.
1966 New Statesman 10 June 852/2 Along the way, in typical Burgess fashion, there are cryptographical and philological sidelights.
1992 European Rep. (Nexis) 26 Feb. 3 Security goods and services, such as the distribution of memory cards, and cryptographical devices.
This entry has been updated (OED Third Edition, June 2011; most recently modified version published online March 2022).
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adj.1653