This part of ISO/IEC 19785 specifies security block formats (see ISO/IEC 19785-1) registered in accordance with ISO/IEC 19785-2 as formats defined by the CBEFF biometric organization ISO/IEC JTC 1/SC 37@ and specifies their registered security block format identifiers. NOTE The security block format identifier is recorded in the standard biometric header (SBH) of a patron format (or defined by that patron format as the only available security block format). The general-purpose security block format provides for specification of whether the biometric data block (BDB) is encrypted or the SBH and BDB have integrity applied (or both)@ and can include ACBio instances (see ISO/IEC 24761). This security block provides all necessary security parameters@ including those used for encryption or integrity. It does not restrict the algorithms and parameters used for encryption or integrity@ but provides for the recording of such algorithms and parameter values. It is a matter for profiling to determine@ for a particular application area@ what algorithms and parameter ranges can be used by the generator of a security block@ and hence what algorithms and parameter ranges have to be supported by the user of a security block. This is out of the scope of this part of ISO/IEC 19785. The second security block is more limited@ but simpler (and in particular cannot contain ACBio instances@ and does not support encryption of the BDB).