Pane kutenda kuti symmetric crypto haina kusimba kupfuura kiyi yeruzhinji. Uchishandisa nzira inoenzanirana, vese vanotumira neanogamuchira vanofanira kumbobvira vataure kiyi inoshandiswa mukushanda kwekunyorera uye kudonhedza meseji. Kunyange izvi haina kukanganisa, zvachose, simba rekunyorera kushanda.
Mune mamwe mazwi, mapato maviri ari kutaurirana anofanirwa kubvumirana pamberi pamberi pekiyi yekushandisaKana mapato aya angowana kiyi iyi, anotumira anonyora meseji achishandisa kiyi, iye anoitumira kune anenge achiigamuchira, uyo anoinyora achishandisa password yaimbomiswa kare. Simba rekuenzanisa rakarara musimba re password, kwete algorithm. Naizvozvo haifanire kunge iri chero rubatsiro kune anorwisa kuti azive algorithm iri kushandiswa. Kuroora kana kuroorwa kana akarwisa akawana kiyi, zvaizobatsira kuziva algorithm. Iko kunyorera algorithms anoshandiswa muGnuPG ane izvi zvivakwa.
Izvi zvinoreva kuti chirevo choga iyo iripo pakati pe symmetric uye asymmetric (inonzi zvakare kiyi yeruzhinji) nzira iri munhare ye «mugero wekuparadzira» yekiyi.
Encrypt pachedu
Kana kiyi kiyi - yeruzhinji neyakavanzika - yagadzirwa, chinodiwa chinomuka ku chengetedza kiyi yakavanzika yakachengeteka kuitira kuti kunyangwe mumamiriro ezvinhu akaipisisa tinogona kuitazve, nekuti kurasikirwa kwayo kwaizoreva kusabatsira kwekiyi, kunyangwe mukana wekuti mumwe munhu agone nyore, mune yakanakisa mamiriro:
- Enda kune yakakosha server kuti uverenge uye kuteedzera yedu yeruzhinji kiyi.
- Nekiyi yedu yakavanzika, gadzira chitupa chekubvisa makiyi.
- Shambadzira kuregererwa panzvimbo yedu
- Kubvisa zvachose hunhu hwedu
Saka kudiwa kunomuka kwatiri encrypt kwatiri. Ndokunge, tiri, tinova mutumi uye mugashiri nekuti chinangwa chedu ndechekuona yedu «public.kiyi». Ndipo panowanikwa asymmetric encryption.
Nyorera kiyi yeruzhinji
$ gpg -o public.key.gpg --symmetric --cipher-algo AES256 public.key
Chii chatakangoita? Encrypt uchishandisa gpg neiyo «–symmetric» gadziriso yeruzhinji.key faira ine iyo AES256 algorithm kuwana sekuburitsa faira «public.key.gpg». Ndokunge, iyo faira yakavharidzirwa nesimba rakaringana. Inogona kubviswa kana, uye chete kana, iyo decryptor iine kiyi.
Dzosera kiyi yakavharidzirwa
gpg -o public.key -d public.key.gpg
Snowden: v