Advanced Encryption Standard (AES) na nzuzo nzuzo, nke a makwaara dị ka Rijndael encryption, bụ ọkọlọtọ nkọwapụta nke gọọmentị etiti US nakweere.
AES bụ ihe dị iche iche nke Rijndael block cipher mepụtara site n'aka ndị na-ese ihe abụọ nke Belgium, Joan Daemen na Vincent Rijmen, bụ ndị nyefere NIST ndụmọdụ n'oge usoro nhọrọ AES. Rijndael bụ ntọala ciphers nwere igodo dị iche iche yana nha ngọngọ. Maka AES, NIST ahọpụtara ndị otu atọ sitere na ezinụlọ Rijndael, nke ọ bụla nwere oke mgbochi nke 128 bit mana nwere ogologo igodo atọ dị iche iche: 128, 192, na 256 bits.
A na-eji ọkọlọtọ a dochie DES mbụ (Data Encryption Standard) ma ejirila ya mee ihe n'ụwa niile. Mgbe usoro nhọpụta afọ ise gasịrị, National Institute of Standards and Technology (NIST) bipụtara Advanced Encryption Standard na FIPS PUB 197 na Nọvemba 26, 2001, wee bụrụ ọkọlọtọ ziri ezi na Mee 26, 2002. N'afọ 2006, akwụkwọ akụkọ ahụ. Ọkọlọtọ nzuzo dị elu abụrụla otu n'ime algọridim kachasị ewu ewu na nzuzo igodo symmetric.
A na-emejuputa AES na ngwanrọ na ngwaike n'ụwa niile iji zoo data nwere mmetụta. Ọ dị mkpa maka nchekwa kọmputa gọọmentị, nchekwa cyber na nchekwa data eletrọnịkị.
Akụkụ nke AES (Ọkọlọtọ nzuzo dị elu):
1.SP Network: Ọ na-arụ ọrụ na nhazi netwọk SP, ọ bụghị usoro Feitel cipher a hụrụ n'ihe gbasara DES algọridim.
2. Data Byte: AES encryption algorithm na-arụ ọrụ na data byte kama data bit. Ya mere, ọ na-emeso nha 128-bit dị ka 16 bytes n'oge ezoro ezo.
3. Ogologo Ogologo: Ọnụ ọgụgụ nke okirikiri a ga-eme na-adabere n'ogologo igodo eji ezoro ezo data. Enwere okirikiri iri maka nha igodo 10-bit, okirikiri iri na abụọ maka nha igodo 128-bit, yana okirikiri 12 maka nha igodo 192-bit.
4. Mgbasawanye igodo: Ọ na-ewe otu igodo elu n'oge ọkwa mbụ, nke a na-emesị gbasaa ka ọ bụrụ ọtụtụ igodo ejiri mee ihe n'otu n'otu.
Ka ọ dị ugbu a, ọtụtụ modul Bluetooth nke Feasycom na-akwado nnyefe data nzuzo AES-128, nke na-eme ka nchekwa nke nnyefe data dịkwuo mma. Maka nkọwa ndị ọzọ, biko kpọtụrụ ndị otu Feasycom.
