Patent ID: 8713709

Claim:
A method for secure key management in a system including a user system, a host system and a network by which the user and host systems communicate, the method comprising: creating a token and populating the token with key material; and cryptographically binding key control information to the key material such that the key material is accompanied with key binding material, which conforms to and is wrapped using a wrapping method indicated by token fields that are unchanged by a chosen wrapping method, the key control information including: information relating to management of the key material populating one or more key management fields that define attributes that limit distribution of the key material, wherein the number of the key management fields is 1 to n and each of the key management fields comprises: a high order byte containing flag bits as an indicator, the high order flag bits comprising a first position defining a rule for export using a symmetric key, a second position defining a rule for export using an unauthenticated asymmetric key, a third position defining a rule for export using an authenticated asymmetric key, a fourth position defining a rule for export to a TR-31 format and a fifth position defining a rule for export in RAW format; and a low order byte containing flag bits as an indicator, the low order flag bits comprising a first position defining a rule for export using a DES key, a second position defining a rule for export using an AES key and a fifth position defining a rule of export using an RSA key, each of the indicators being independent and indicative of one key exchange that is performable on the key material.