AES128 vs AES256

Advanced Encryption Standard (Advanced Encryption Standard, abbreviation: AES), this standard is used to replace the original DES and is widely used all over the world.

AES can encrypt and decrypt quickly in software and hardware, is relatively easy to implement, and requires only a small amount of memory. It is currently being deployed to a wider range.

1. What are the main difference and security levels between AES128 and AES256?
2. What is their consumption on the machine?
3. What is the performance of the two?
4. How to choose for actual development?

AES is very fast compared to similar symmetric encryption algorithms. Mwachitsanzo, an x86 server with AES-NI can at least reach a speed of several hundred M/s. Security is basically equivalent for the foreseeable future, as even 128-bit is complex enough not to be brute-forced. Pakadali pano, 112-bit passwords akadali ntchito malonda, ndipo 128-bit ndi makumi masauzande nthawi zambiri kuposa 112-bit, kotero ndizotsika mtengo kugwiritsa ntchito 128-bit pochita (pang'ono amapulumutsa chuma).

AES256 imatenga pafupifupi 40% nthawi yochulukirapo kuposa AES128, za zowonjezera 4 kuzungulira kwa makiyi ozungulira ndi ntchito yofananira ya SPN. Kuphatikiza apo, kupanga makiyi a 256-bit kungafunenso makiyi apamwamba kuposa makiyi a 128-bit, koma gawo ili lapamwamba liyenera kukhala lonyozeka.

Mlingo wachitetezo mwachilengedwe ndi AES256 otetezeka kuposa AES128 chifukwa pakadali pano palibe njira yowukira ya algebraic yothandiza kwambiri kupatula kusweka kwamphamvu..

Pali njira zenizeni zowukira za mapulogalamu / zida za AES-256 kapena AES-128, kotero sikophweka kulongosola zonse.

cryptography yamakono imagawidwa mu symmetric encryption ndi asymmetric encryption (public key encryption), ndipo ma algorithms oyimilira ndi DES (tsopano yapangidwa kukhala 3DES), AES, ndi RSA. Kugwiritsa ntchito ma asymmetric encryption ma aligorivimu ndikokulirapo kuposa kubisa kofananira. zambiri, hybrid encryption processing ikuchitika, Mwachitsanzo, RSA imagwiritsidwa ntchito pogawa ndi kukambirana, ndipo AES imagwiritsidwa ntchito pobisa komanso kubisa deta yamabizinesi.

Zithunzi zina zokhudzana ndi ma encryption and decryption symmetric and asymmetric algorithms:

Ponena za kugwiritsa ntchito algorithm ya AES128 kapena AES256, Ine ndekha ndikuganiza kuti AES128 ndiyokwanira, kumene, AES256 itha kugwiritsidwa ntchito ngati chida chotsatsa.