"So, when it comes to WikiLeaks obtaining US diplomatic cables, either no one at the US state department had ever heard of cryptography, or they were too lazy t

"So, when it comes to WikiLeaks obtaining US diplomatic cables, either no one at the US state department had ever heard of cryptography, or they were too lazy to care, or –" I think the author missed a fundamental point of encryption - if someone with access to the decryption key wants to leak the plain text, it is quite difficult to stop them.