all: add command to remove the private key

The remove-private-key decrypt the issuer's value back using previous
private key and store it back to file as plain text.

1 files changed, 5 insertions, 0 deletions

diff --git a/README.md b/README.md
index 6c977bc..85a9579 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,11 @@ remove <LABEL>
 
 	Remove LABEL from configuration.
 
+remove-private-key
+
+    Decrypt the issuer's value (hash:secret...) using previous private key and
+    store it back to file as plain text.
+
 rename <LABEL> <NEW-LABEL>
 
 	Rename a LABEL into NEW-LABEL.