[JamesP81]

Those strings are 64 bits in hexadecimal format. Doing some math, they can be expressed as a 1024 bit binary string.

1024 bit is a common key length for encryption / decryption keys. So I agree, these are almost certainly decryption keys for something.

[LouieFisk]

“So I agree, these are almost certainly decryption keys for something.”
==
I’d say more likely they are hashes to verify if/when the big file is made available, those who download it can tell they got the real deal.
This is helpful in explaining what the posted numbers may mean:
http://emptylighthouse.com/what-are-numbers-wikileaks-keep-tweeting-john-kerry-ecuador-uk-fco-2086433286

[LouieFisk]

But encryption keys is a very viable alternative theory. I think we’ll find out within a day or so.