Video: Cov yuam sij symmetric sib koom li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Symmetric key cryptoography yog ib qho encryption system uas tus sender thiab receiver ntawm cov lus qhia ib, common tus yuam sij uas yog siv los encrypt thiab decrypt cov lus.
Kuj nug, tus yuam sij zais cia sib koom li cas?
A qhia zais cia yog cryptographic tus yuam sij los yog cov ntaub ntawv tsuas yog paub rau ob tog koom nrog kev sib txuas lus ruaj ntseg. Cov qhia zais cia tuaj yeem yog txhua yam los ntawm cov passwords lossis cov kab lus hla, mus rau tus lej random lossis ib qho ntawm cov ntaub ntawv xaiv xaiv.
Tsis tas li ntawd, cov yuam sij symmetric ua haujlwm li cas? Hauv symmetrical - key encryption , txhua lub computer muaj qhov zais cia tus yuam sij (code) uas nws tuaj yeem siv los encrypt ib pob ntawv ntawm cov ntaub ntawv ua ntej nws xa tawm hauv lub network mus rau lwm lub computer. Symmetrical - key encryption yog qhov tseem ceeb tib yam li cov lej zais cia uas txhua tus ntawm ob lub khoos phis tawj yuav tsum paub txhawm rau txiav txim siab cov ntaub ntawv.
Ib yam li ntawd, symmetric key faib yog dab tsi?
Hauv symmetric key cryptography, ob tog yuav tsum muaj qhov zais cia tus yuam sij uas lawv yuav tsum pauv ua ntej siv ib yam encryption . Hauv pej xeem tus yuam sij cryptoography, cov kev faib tawm tseem ceeb ntawm pej xeem cov yuam sij yog ua los ntawm pej xeem tus yuam sij servers.
Koj pom tus yuam sij symmetric li cas?
Tus naj npawb ntawm cov yuam sij yuav tsum tau txuas N tog siv symmetrical cryptoography yog muab los ntawm cov qauv : (N * (N-1)) / 2. Kuv nyiam sau nws (N²-N) / 2 vim pom cov square pab kuv nco ntsoov nws yog tus qauv rau symmetrical algorithms. Asymmetrical yog 2n.
Pom zoo:
Cov yuam sij symmetric tsim li cas?
Symmetric-key algorithms siv ib tus yuam sij sib koom; khaws cov ntaub ntawv zais cia yuav tsum khaws qhov tseem ceeb no zais cia. Qee zaum cov yuam sij raug tsim los siv lub tshuab hluav taws xob random (RNG) lossis pseudorandom tooj generator (PRNG). PRNG yog lub khoos phis tawj algorithm uas tsim cov ntaub ntawv uas tshwm sim hauv kev tshuaj xyuas
Ib tus yuam sij tseem ceeb puas tuaj yeem muaj ob tus yuam sij txawv teb chaws?
Nws yog qhov zoo kawg nkaus kom muaj ob kab ntawv tseem ceeb txawv teb chaws xa mus rau tib lub ntsiab lus tseem ceeb hauv ib lub rooj sib txawv vim tias txhua tus nqi tseem ceeb txawv teb chaws yuav siv cov ntaub ntawv sib txawv hauv cov lus hais
Koj yuav ua li cas ntxuav cov yuam sij laptop yam tsis tau tshem cov yuam sij?
Cov kauj ruam tua thiab tshem tawm koj lub laptop ua ntej koj ua txhua yam huv si. Tilt lub laptop upside down thiab maj mam kais los yog shakeit. Txau nruab nrab ntawm cov yuam sij nrog compressed cua kom tshem tawm cov plua plav. So cov yawm sij nrog ib daim ntaub ntub dej microfiber. Tshem tawm cov grime uas tawv ncauj nrog paj rwb pob dipped inisopropyl cawv
Koj txhais li cas los ntawm tus yuam sij ntiag tug thiab pej xeem tus yuam sij cryptography?
Nyob rau hauv pej xeem tus yuam sij cryptography, ob tus yuam sij yog siv, ib tug yuam sij yog siv rau encryption thiab thaum lwm yam yog siv rau decryption. 3. Nyob rau hauv private keycryptography, tus yuam sij yog khaws cia tsis pub leejtwg paub. Nyob rau hauv pej xeem tus yuam sij cryptography, ib qho ntawm ob tus yuam sij yog khaws cia tsis pub leejtwg paub
Cov yuam sij tseem ceeb thiab cov yuam sij txawv teb chaws yog dab tsi?
Relation of Primary Key vs Foreign Key Ib lub ntsiab tseem ceeb tshwj xeeb qhia cov ntaub ntawv nyob rau hauv lub rooj sib tham database, whereas tus yuam sij txawv teb chaws yog hais txog lub teb nyob rau hauv ib lub rooj uas yog lub ntsiab tseem ceeb ntawm lwm lub rooj