cryptographicadj.
/ˌkrɪptəˈɡrafɪk/, U.S. /ˌkrɪptəˈɡræfɪk/ Of or relating to cryptography; written in code or cipher; cryptographical.
ΘΚΠ
the mind > mental capacity > knowledge > secrecy, concealment > code, cipher > [adjective] > of the nature of cryptography
polygraphical1588
steganographical1588
cryptographical1653
cryptographal1663
cryptographic1790
cryptological1868
polygraphic1878
cryptologic1899
1790 E. Ledwich Antiq. Ireland 101 It is probable the use of brachygraphic and cryptographic notes was known in Ireland, at the very time St. Cuthbert's text was written.
1824 J. Johnson Typographia II. xii. 478 A cryptographic, secret, or cypher writing.
1870 Pall Mall Gaz. 5 Nov. 4 The cryptographic advertisements in the second column of the Times.
1943 J. M. Wolfe First Course Cryptanal. (rev. ed.) II. x. 1 During the Civil War the rail fence transposition was one of the cryptographic systems used as a field cypher.
1963 F. C. Crews Pooh Perplex 149 Cryptographic evidence was adduced to show that the Pooh books were written..by Rudyard Kipling.
1998 J. Barnes England, England (1999) 99 For a time he kept in cryptographic form in the back of a maths textbook..a graph of dermal eruption plotted against the sex he had with the lost magazine women.
This entry has been updated (OED Third Edition, June 2011; most recently modified version published online March 2022).
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adj.1790