Quote from: Guru on July 25, 2012, 06:04 amWhen I want to get rid of a file, I like to encrypt it first. I use ccrypt, which is like Unix crypt, except it uses AES256.. I invoke it with the 'brave' option, meaning that I don't have to repeat the passphrase, so I type randomly on the keyboard for 5-10 seconds. (ccrypt -b -e file.ext). This encrypts the files 'in place' only adding a .cpt file extent to the original file name. Nice. I take it that's this: http://ccrypt.sourceforge.net/Quote from: Guru on July 25, 2012, 06:04 amBecause I don't know what the passphrase is, even under coercion I could not decrypt these files, once encrypted. I finish the job invoking wipe, using the -P option to rename the files, say 35 times after wiping. I daresay no forensic investigator could make sense of the bit soup that results. Yep, that should do the job pretty thoroughly.When I delete with srm on the OS X system I use the -f (force), -m (medium) and -z (zero) flags. The command basically behaves like rm, so I can also use -r to recursively take out an entire directory. The -m is a little mis-named as it is in comparison to -s (simple).A simple wipe overwrites the file with random data before unlinking it.A medium wipe overwrites the file with 7 US DoD compliant passes (i.e. 0xF6, 0x00, 0xFF, random, 0x00, 0xFF, random). Then it is followed by another zero pass (0x00) and unlinked.The Linux version uses slightly different flags; -D (for US DoD compliance) instead of -m. It also has an option between -s and -D which is -E (for US DoE compliance; 2 random passes and 1 of the characters "DoE").Quote from: Guru on July 25, 2012, 06:04 amQuote from: LouisCyphre on July 21, 2012, 08:23 amQuote from: zalaan on July 21, 2012, 02:10 amThis is a problem for all SR users. While *I* might be doing the right thing, there's no guarantee the *other* party is... :(That's always the risk of dealing with another unknown party.Yep. Even if you use GPG, if the other party is cop, or turned informant, all the crypto on the planet won't help you. Absolutely. That's the fear of everyone here.