[FEATURE] Specification change of security token lock function

[YoshihitoAso]

Is your feature request related to a problem? Please describe.

current specs The specifications of the current security token lock function are as follows.

• Authorization is required for the lock address of the asset
• Only the lock address can be unlocked

problem

• It is difficult to build an operation flow for lock address authorization.
• If the secret key of the lock address is leaked, the lock asset cannot be unlocked.

Describe the solution you'd like

• Abolish authorization for lock addresses.
• Allow unlocking of assets with issuer (owner) authority.