Key post is the keyword that allows you to create articles (posts), giving the voting and comments. Posting Key is also the basic password from Your Steemit account (n.b.: the main Password is the Master Key).
Basically, the access rights of Key Posts is very limited, and must be in the Active state. In addition, the task of Posting the Key is can be used for the benefit of others.
What kind of interests? Such as Broadcast, log in to Dtube, go to StepShot, and others. In short, there is no Key Posts related to transfer of funds, either sent or received.
What is the password of secure Key Posts to be shared to others? I don't know because Steemit did not provide more information related to this problem.
Since there is no further explanation of the associated password post type Key, maybe it will be good if you keep maintaining the confidentiality and security of this Key Post.
What is the Active Key?
Active Key is the active keyword that allows you to do things that are sensitive such as transfer of funds, either sending or receiving; or increase or decrease transaction, change the Steem Dollars, giving it a vote, renewing the details profile and avatar, and/or transaction from your account Wallet.
In addition, Active Key also served to connect/connect one account Steemit with other accounts, such as Busy or Dtube which is still in a single scope with Steemit.
Always remember that the Active Key there is no connection with the Master Key; and always remember, the Master Key is the password must always take care of You.
In short, Active Key is the password of that aim and beneficial to conduct transactions from your account Wallet (wallet) you, like logging into SteemConnect (third party, Busy or Dtube), a transaction in the SteemConnect, or other providers.
Oh yes, Active Key can also be used to provide a vote/voting, making the article or other, as does Posting Key (number 1 above).
What is the Owner of the Key?
Owner's Key is a password that is used when necessary. Remember, guys ... these keywords are keywords that are the most powerful because it can change the key of any account, including the keywords the owner.
Steemit explained that the Owner should Key on Save Offline, be it in a Draft Email, Notepad, or any other secret places.
What is the Memo Key?
For the moment the Memo Key not used; and there is no more information related to this type of password at Steemit.
Conclusion
Once you understand and really understand the full explanation about the related notions of difference and Posting Key, the Active Key, Owner Key and the Memo Key in Steemit, the conclusion is still keeping the whole password.
Steemit will never will, nor will ever be able to recover any lost password recovery, or an Steemit account hacked by someone else.
If Your Steemit account is missing, then you will not be able to access to your account Steemit you had for ever and ever. Steemit accounts are lost or forgotten passwords will never be repaired and restored as they are.