law: Information Technology Act, 2000
  10. Power to make rules by Central Government
  
  in respect of digital signature.- 
  The Central Government may, for the purposes
  
  of this Act, by rules, prescribe-
  (a) the type of digital signature;
  (b) the manner and format in which the digital
  
  signature shall be affixed;
  (c) the manner or procedure which facilitates
  
  identification of the person affixing the digital signature;
  (d) control processes and procedures to ensure
  
  adequate integrity, security and confidentiality of electronic records or
  
  payments; and
  (e) any other matter which is necessary to
  
  give legal effect to digital signatures