Great Cryptography Quote

Here is a quote that Bruce Schneier made:

There are two types of cryptography – that which will keep secrets safe from your little sister, and that which will keep secrets safe from your government

Here is one that I came across that is a very interesting retort:

There are two types of cyptography: one that allows the Government to use brute force to break the code, and one that requires the Government to use brute force to break you.