He's the alphabetically latter namesake of a result showing that an analog signal can be reconstructed  without aliasing  from a digital signal as long as the (*) sampling rate for the original analog signal is greater than or equal to twice the signal's bandwidth.
In this scientist's classified report A Mathematical Theory of Cryptography, he mathematically showed that all unbreakable ciphers are equivalent to one-time pads. This scientist showed that the probability of error can be made arbitrarily small if the rate of transmission is less than the capacity of a "noisy" channel. He's the alphabetically latter namesake of a result showing that an analog signal can be reconstructed  without aliasing  from a digital signal as long as the (*) sampling rate for the original analog signal is greater than or equal to twice the signal's bandwidth. This scientist's source coding theorem sets the limit for lossless compression, requiring that the average number of bits per symbol not be less than his namesake entropy. He names the previously mentioned sampling rate result with Harry Nyquist. For 10 points, name this father of information theory.
In this scientist's classified report A Mathematical Theory of Cryptography, he mathematically showed that all unbreakable ciphers are equivalent to one-time pads.
Claude Shannon