Tim May writes:

It gets back to the threat model. If the threat model is interception by the neighborhood kids, then schemes for frequency-hopping, scrambling, "warbling," and PhasorPhone-like diddling are OK. If the threat model is the local police department tapping one's phone, probably not enough, as they likely can gain access to the E-Systems DigiTrac 6700 and trivially unscramble the signal.

Ok, I'll take the Bait. What else can you tell us about the E- systems Digitrac 6700? "enquiring" minds want to know.......;) Brian D Williams Cypherpatriot