Let’s say you have some private-key (symmetric-key) encryption scheme. It takes a key and a message, and outputs a ciphertext. Nobody without the key can decrypt the message using the decrypter. Is that secure? Not if it’s deterministic.

### Archives for the ‘Math’ Category

## Cumulative Binomial Distribution

Sunday, 25 September 2011

In my defense, I was trying to give an exact number.