There is a short section about the cypherpunks in Applied Cryptography ISBN 0471117099, written by Bruce Schneier.
See also Cypherpunk anonymous remailer, crypto-anarchism.
... square[?]. To "complete the square" is to add a constant (i.e., in this case, a quantity that does not depend on x) to the expression to the left of "=", that will make it ...