My idea of the OTP is to generate from 50 letters (5 words, each 10 letters) a new pad of 2000 random letters, then attach user email to the pad end (to make it unique). The keywords and the pad will be based on the Ascii table from 33 to 125. The term of use is to make the message size the same of pad size, so the pad is valid for one use only, and if required, new words can be added.
In contrast, drop the OTP and implement AES 256 CTR, which would be more secure and trustable?
age
. $\endgroup$ – SAI Peregrinus Apr 24 '20 at 1:32