Keys have always had great symbolic significance! In that the key can be used to unlock both again and again, it symbolizes the wearer's power to bind and to loosen. In the old days, it was important for the housewife to take care of the keys. As a symbol of her dignity, she wore the keys in a bundle of belts.
In Matthew 16 we can read Jesus' conversation with Peter:
"I will give unto thee the keys of the kingdom of heaven: and whatsoever thou shalt bind on earth shall be bound in heaven: and whatsoever thou shalt loose on earth shall be loosed in heaven."
In the verses before this statement, Jesus asks his disciples who the people say the Son of Man is. After various answers, Jesus will know who the disciples say he is. Simon Peter says: You are the Messiah, the Son of the living God. Jesus then declares that this flesh and blood did not give you the understanding of, but my Father in heaven. Jesus here utters a mystery and a treasure: ... on this rock I will build my church and the gates of hell will not have power over it.
Krist Brud, the congregation, is like this housewife who has been given the keys to the house. She has the authority to unlock and re-open doors in the house.
Jesus has given you and me the keys to the kingdom of heaven, as a sign that He has opened "the home" and His heart for us. A strong symbol of trust and an everlasting relationship.
As a prophetic symbol, the key means:
Authority to something, ownership, prophetic authority and royal authority
On several occasions in prayer, Jesus has repeatedly shown me these keys. He says to us today:
"You are clothed in my authority, when I gave you the keys of my kingdom. Hang the keys in your belt and walk in my authority. "
God bless you!