I don't need a lock on my door: I possess nothing of value. This sounds like such a good argument, doesn't it?
OK to sum it up: using encryption is up to everybody themselves. But consider why you do one thing (i.e. lock the door) but not the other
The computers I run are sufficiently locked down that I really don't need to worry about encryption. It's kind of like putting a safe inside of a bank vault. It's really quite redundant.
So for day to day operations, encryption will only slow me down and prove to be a nuisance.
Look at it like this -- why would you bother locking your bedroom door or bathroom door everytime that you leave the room? Nobody is in the house anyways, so the only thing that you're doing is creating a problem for yourself. Think of that the next time you really really really really really have to pee badly and can't find the keys to the bathroom!
Encryption matters, and it helps. It doesn't provide 100% protection against a dedicated "thief", but it very well helps against lesser villains.
Not quite. Good strong encryption provides 100% protection against anything known to mankind for now and the forseeable future.
To verify that, calculate the keyspace of Rijndael at 256 and you'll see that it very quickly dwarfs the number of atoms in the universe. Check here
on symmetric ciphers to find out. The size of the number is 1,296 billion billion billion billion digits. Rijndael is VERY secure.
But let's put those numbers into a bit of perspective...
The number of hydrogen atoms in the observable univers is around 3 * 10^79. So, let's write that number out...
Now... The key space of AES 256 (Rijndael) takes up space on a hard disk, so we can't actually put that number here because it's that big. But, let's look at it a tad...
Now. 1 MB is 1,000 KB. And 1 GB is 1,000,000 KB. But we'll need much larger numbers that that. But 1 billion digits is far beyond even the SI system
. It goes up like this:
10^24 = yotta-
10^21 = zetta-
10^18 = exa-
10^15 = peta-
10^12 = tera-
10^9 = giga-
10^6 = mega-
10^3 = kilo-
But we're talking about:
10^1,000,000,000 for just the small number of 1 followed by 1 billion zeroes!
But the key space is 1,296 * 10^1,000,000,000 * 10^1,000,000,000 * 10^1,000,000,000 * 10^1,000,000,000!
For the new and upcoming hard drives with terabytes:
1,000,000,000 / 12 = 83,333,333
So you'd need:
1,296 * 8.3 * 10^7 * 10^1,000,000,000 * 10^1,000,000,000 * 10^1,000,000,000 terabyte hard disks
= 1.1 * 10^11 * 10^1,000,000,000 * 10^1,000,000,000 * 10^1,000,000,000 terabyte hard disks
To hold the number. That's a lot of hard disks... I don't have that many at home.
But just look at the first part:
1.1 * 10^11
Now, if that were money, you'd have $110,000,000,000. That's 110 billion. The numbers are staggeringly, insanely HUGE!
If that first part were simply bytes, it would fill a 110 GB hard drive! And that IGNORES the rest of the number!
Ok - I'm just blathering on at this point. But really... Those are some REALLY big numbers! I'd say AES 256 is secure, and I'd bet on 100%.