Ordinary cryptographic systems rely on scrambling messages so thoroughly that only a recipient with a code key can unscramble them.
And Mr. Bush's plans for overhauling Social Security and rewriting the tax code, key elements of his effort to cast himself as a reformer, would become that much more difficult.
After some modifications to the internal functions and a shortening of the code key size from 112 bits to 56 bits, the full details of the algorithm that was to become the Data Encryption Standard were published in the Federal Register in 1975.
Free text answers underwent qualitative content analysis, coding key themes and concepts.
The pedal has its own coded key to ensure that it can only be used by its rightful owner, he added.
The process is much like popular payment services like Alipay: users just scan the merchant's QR code, key in the amount and hit pay.
* Political gridlock, education, tax code key worries.
Signal lights, which were secured in a wooden case, employed a battery-operated Morse code key.
Apart from voice communication, it featured a buzzer unit with a Morse code key, so that it could be used to send and receive coded messages.
