Quote - Good to see you Ted!  Lots of paying work I take it? 

Thanks. Yes lots of work. In fact, speaking of zip files, I'm doing lots of work for PKWARE, the company that invented the zip file.

I designed and helped build Viivo.

Check it out.

http://viivo.com/

Viivo is actually useful if you're paranoid. You can keep stuff in free cloud storage with almost absolute certainty that nobody can read it. (I only say almost because if you let somebody hack your computer and become you and you let it remember your Viivo password for you, then it's game over. But in that case, they already got your files off your computer directly.)

It encrypts stuff transparently and then sends it to the dropbox. Said encrypted stuff is automatically decrypted by your other devices. The keys never leave your computer, so even the administrators of Viivo cannot divulge your content to anybody - not even the US government.  It also manages sharing with other people, and does so while letting you control who can access the content. No administrator or government agency can do anything about it.

Once Viivo is installed and set up, you can forget it. It will handle everything automatically. If you modify a file in your protected area, Viivo will detect the change and just encrypt that. You can even put an entire Poser runtime into Viivo and it will be kept in sync on all your computers, while remaining unreadable to anybody else. (Well they can read the file and folder names, but not the contents, if they are a dropbox administrator. We are considering offering file name encryption as well, but that means you will not be able to "see" your files in the dropbox web site anymore.)

It uses RSA-2048 and AES-256 encryption technologies. Your bank data already is held in "the cloud" using similar technology, so if you think it's not good enough, then stop using banks. With Viivo, you hold the encryption keys. Banks don't do that, so if they get a subpoena they can and will reveal your data to investigators. This is because the bank holds the keys, not you. With Viivo, you hold the keys.

Here's a recent, unbiased, unsolicited review:

http://www.web2andmore.net/2013/03/13/viivo-encryption-for-cloud-computing-is-simplicity-itself/

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)