superencipherv.
/ˌs(j)uːpərˌɪnˈsʌɪfə/, /ˌs(j)uːpərˌɛnˈsʌɪfə/, U.S. /ˌsupərˌɪnˈsaɪfər/, /ˌsupərˌɛnˈsaɪfər/ transitive. To recode a message that is already enciphered; = recipher v.
ΘΚΠ
the mind > mental capacity > knowledge > secrecy, concealment > code, cipher > express in code [verb (transitive)] > convert into code > second code
recipher1863
recode1923
superencipher1957
transcode1962
1957 Encycl. Brit. V. 926/1 The security of a code system depends..upon whether it is used..with a good cipher system which is superimposed on the code text... Code messages which undergo this second step are said to be superenciphered, re-enciphered or, simply, reciphered.
1971 New Scientist 8 July 104/3 Each word was represented by a random five-figure number, and was superenciphered for added security.
1989 A. Stripp Codebreaker in Far East ii. vii. 69 Their decryption had become progressively more difficult during the 1930s as the Japanese experimented with machines to superencipher the texts of messages between Tokyo and certain missions abroad.
2011 N.Y. Times (National ed.) 26 July d3/5 The Germans' conscious adoption of the one-time pad to superencipher their Foreign Office codes.
This is a new entry (OED Third Edition, June 2012; most recently modified version published online March 2022).
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v.1957