Archive encryption?

[Beansprout]

I have a number of sensitive files which will need posting on DVDs to clients. I know RAR files can be 'password protected' but this isn't really good enough...ideally the files need to be encrypted to prevent snooping and in some sort of archive format, and be usable without specialist software.

Are there any archive formats out there which can be encrypted by their creation software, or do I need to buy extra software? Any ideas?

Thanks

 

[Beansprout]

Thanks for all the suggestions guys

I use Truecrypt myself - hadn't thought of burning a Truecrypt image to disc. Genius

RARs using AES encryption also looks good - I suppose everyone has a copy of WinRAR and if they don't...I can include a copy on the disc

I will have a fiddle and report back...thanks!