With enough data in the cloud, average grade encryption, even with a low security password, is IMO a good option when you combine it with some steganography. Let them steal all your data from the cloud and sift all mp3, jpgs, videos etc. in search for the encrypted bit they need!
Even without stegano, I'll give a concrete example:
Cloud = dropbox = free. If you want you can use a low cost VPS, something like $1-$2 per month. Emailed to yourself. OneDrive. Google Drive. Any of the paid online backup services, Mozy, Carbonite, or just raw AWS storage.
File = compressed and encrypted with RAR. This uses 256 bit AES generated pseudorandomly and takes the longest to crack with brute force, because it uses a couple hundred thousand iterations of SHA in its KDF. RAR is partially open source, but the archiver has been around for two and a half decades, and the latest version has been downloaded a few million times.
Password = 8 to 24 character alpha numeric. I've been able to generate some using dice (for fun) and memorize them in 3 chunks of 8. One could use something like WarpWallet to feed this password and use the resulting private key as the actual password for the RAR file.
So a "passphrase" of "abcdefgh" will take a few seconds to derive "5JPkUh35jo1x39wGoC3XLmmHgAtpYdzcHSwWCknoiYdPE97WcrM"
Average Grade these days means 128 or 256 bit AES.
You can upload the encrypted file anywhere using a "short" password of 8 characters (which should be easy to memorize even if its truly randomly generated) and it will be relatively secure for at least 100 to 200 years. I'd keep a copy of all the needed HTML and winrar.exe in the same cloud, plus instructions in plain text.
Someone would have to specifically target you, and then you're screwed no matter what you do as if you have any family they will simply threaten violence on them. Sure you can survive extreme torture, but would your spouse or partner? Would your children?
Link:
https://keybase.io/warp/
