Question 1

What isHash？

Accepted Answer

HashisonetypesingletowardencryptAlgorithm，willAnyLength'snumberaccording toConvertasLength'sCharactersString。Commonatpassword、numberaccording tocompleteIntegerverifyandNumbersname。

Question 2

MD5andSHA-256haswhatDifference？

Accepted Answer

SHA-256thanMD5moreSecure，Generate64digitHexadecimalCharactersString（vs MD5's32digit），andmoreStrong。suggestUseSHA-256orSHA-512。

Question 3

HashcanReflexivetowarddecrypt?？

Accepted Answer

Hashissingletowardfunction，TheoreticalupnoReflexivetowarddecrypt。butWeakHashe.g.MD5canPasstableBrute force，becausethisheavywantnumberaccording toshouldUseSHA-256byupAlgorithm。