CSTA-security { iso( 1) identified-organization( 3) icd-ecma( 12) standard( 0) csta3( 285) security( 128) } DEFINITIONS ::= BEGIN EXPORTS CSTASecurityData,TimeInfo; CSTASecurityData ::= SEQUENCE { messageSequenceNumber [0] IMPLICIT INTEGER OPTIONAL, timestamp TimeInfo OPTIONAL, securityInfo SecurityInfo OPTIONAL } SecurityInfo ::= CHOICE { string OCTET STRING, private NULL } -- The actual encoding is added here, -- replacing NULL with another valid ASN.1 type. TimeInfo ::= GeneralizedTime END -- of CSTA-security