Some Applications of Directed Signature Scheme
  Directed signature scheme is applicable when the signed message contains information sensitive to the receiver, because only receiver can directly verify the signature and that he/she can prove its validity to any third party, whenever necessary. This paper presents two applications of directed signature scheme. (i) Directed &#8211;Delegated Signature Scheme. This scheme combines the idea of proxy signatures with directed signature scheme. (ii) Allocation of registration number. This scheme proposes a registration scheme in which the registration number cannot be forged and misused. 
Sunder Lal and Manoj Kumar