There's no particular need to make it a single-image random dot
stereogram. Double images are much easier to make and provide an extra
bonus (see below). Here is an example from a post to cypherpunks on
September 23, 1997:
VGhpcyBpcyBhIHRlc3Qg VGhpcyBpcyBhIHRlc3Qg
bWVzc2FnZSB3aGljaCBp
Well, not crypto but stego.
I was looking for ways to use existing infrastructure for
transporting ascii messages to send info which is not
harvestable by machines.
This came up:
It is intended for cross-eyed free viewing. Cross your eyes until the
Vs and Xs at the top and bottom overlap with
2 matches
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