Wiktionary
cyphering
vb. (present participle of cypher English)
Usage examples of "cyphering".
Like the incredible noise that issues from a cyphering organ played full through faulty stops, a chorus of strident howls arose.
As to Tom, Charley's brother, I am really afraid to say what he did at school in cyphering, but I think it was Decimals.
What would be the point of cyphering messages that very clever enemies couldn't break?