Value,Description,Reference
0,Unassigned,
1,BAB-HMAC,[RFC6257]
2,PIB-RSA-SHA256,[RFC6257]
3,PCB-RSA-AES128-PAYLOAD-PIB-PCB,[RFC6257]
4,ESB-RSA-AES128-EXT,[RFC6257]
values greater than 4,Reserved,[RFC6257]