128 bits is still strong and will be for the forseeable future, excepting a sudden mathmatical breakthrough. Further, the cost to brute force rises exponentially with the keysize and can easily outpace Moore's Law.
You would do well to pick up a copy of "Applied Cryptography" (or "Practical Cryptography", which is sort of the updated version, but I haven't read it myself yet). In particular, you may find the chapter on combining ciphers enlightening. You can't just put two 256-bit ciphers together and get a 512-bit cipher. IIRC, you're not worse off (security-wise) than if you had only used one cipher, but you're probably no better off, either. It's possible to combine ciphers, but it has to be done carefuly.
send money to your kernel via the boot loader.. This and more wisdom available from Markov Hardburn.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
Outside of code tags, you may need to use entities for some characters:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||