Cryptographic ki ina hana like o ka 'ike' ohana ka palekana: manaʻo, ano, kī kulana

Puke Wehewehe haawi kokoke mākou i kekahi i kekahi, semantic ka wehewehena o ka makahiki "cryptography", pu ole, wale nō i loko o ka mau o kona palapala noi. Cryptography - ka 'epekema e pili ana i ka hoʻopale' ike ma keʻano o kāu kiʻina hana no ke kaupalenaʻana i ka mana e pono ai e lilo i poe ike me ia, a me kona hoʻohana.

Cryptographic ki ina hana like o ka 'ike hoomalu ana - o ka loli o ka' ike no kona hou EYI i ka mana kanaka. I ka rula o kēia mau kiʻina hana, ua like penei. N hamama hoʻopā'āluaʻia ka olelo, e loaa i ka palapala o ka paʻa kikokikona a kiʻi kapa cryptogram. E möakäka hou cryptogram ua pū i hiki ma luna o ka maluhia a insecure Kanal pū i hiki 'ike no ka loaa wahi. An mana mea hoʻohana hāpai inverse paha omńkalakala o ka loaa mai memo a me ka loaa ana o ka palapala plaintext. Pela, ke interception Shirograms akeakea kuleana kanaka e,ʻaʻole e hiki ke heluhelu ia, i ka ike i ke ano o ka cryptographic 'ike hoopakele ki ina hana like i hoʻohana no ka encryption.

Ka manaʻo o ki cryptography ua pinepine hoʻohana ', e leie aku e huki i ka laua ma waena o ka hoʻopā'āluaʻia ike, a me ka helu kuʻina nenoaiu. Cryptographic hoomalu ana o ka 'ike hoʻohana no ka encrypting a decrypting i nā kaʻina o nā huapalapala, a ua kapaia ke kī. Penei, ma ka hoʻohana 'ana i ka ia cryptographic algorithm encryption? Acoeueoao hilinaʻi nui ma luna o ke kī.

Ki no lākou Mea Maluna ua maheleia i:

• symmetrical, oa i ka mea i hoʻounaʻia, a pa alima i loko o ke kaʻina hana o ka encryption a me decryption ma ka ia kī, a hōʻoiaʻiʻo he kiʻekiʻe hūnā 'ia' ana o ka hoʻopā'āluaʻia olelo, akā, hana pilikia i loko o ka functioning o ki i loko o kekahi 'oihana, ma kahi he nui helu o nā mea hoʻohana;
• asymmetric, ma ka mea ka mea, ua manaoia he kī mau, a hoakaka i ka paʻa (kula) a me ka lehulehu ki.

I ka rula o ka ki mau mea: a pilikino ki ua hoʻohana 'ia paha i ka lehulehu kī, akā,ʻaʻole hiki ke ua loaʻa hoʻi i kaʻikeʻia lehulehu kī. Kēia e hōʻoiaʻiʻo i ka hōʻoiaʻikepili pilikino hoʻokuʻikuʻi ka wā laila 'o ia' ike, i kakauinoaia e ka uila kikohoʻe inoa (EDS).

ike hoomalu Cryptographic hoʻohana asymmetric ki mana no ka encrypting ho'īli kahi o ka waiho waho 'ike. Ka lehulehu ki mea maikaʻi e puku i ka mau inoa ma ka lolouila (kikohoʻe), i ka hoʻomano hoʻohana ma ka Internet uku nenoai.

Cryptographic ki ina hana like o ka 'ike' ohana ka palekana e halawai pu i ka kēia mau koi:

1. Me ka pilina paʻa cipher hiki o withstanding cryptanalysis, a hoomakaukau i ke ala o ka puka wale ma exhaustive huli ki. No laila, i ka pahiki manao paa ki hilinaʻi nui ma luna o kona lōʻihi.
2. E hōʻoia mea paʻa o ka cryptographic'ōnaehana ma ka maluhia ho'āhu malu ki, a algorithms i ole ka hoʻohana 'ia.
3. Hiki paha ke i ka buke o ke Karaima, 'ike i ka' aʻole e oi aku i ka mua.
4. Ke kāpaeʻana ei a me ka lilo ana o ka 'ike ma muli o ka hewa ka wā encrypting.
5. E hōʻoia palena iki hoʻopā'ālua manawa.
6. Ua hana mau ma waena o ka encryption waiwai, a me ka waiwai o ka loiloi mua 'ike.

Cryptographic ki ina hana like o ka 'ike' ohana ka palekana i wehewehe aku e ke kumupaʻa o ka cipher i mea no ka nui ana o ka laulā. Kēia ka hoʻokōʻana i ka waiwai e lilo aku i ka manawa a me ka waiwai o ke dala koi 'ia no ka loaa ana i ka decryptor mua memo i loko o ka wa e kaawale aku o ka encoded kī. Eia nae, aole e ole ka nawaliwali ma ka encryption algorithms, i koke e ho omaulia i ka poe paahana, a me ka ike loea lawa kī loa, mau koina ulu me ka nui loa.