Act.dat

act.dat header(encrypted) structure

Name	Offset	Size	Example	Remark
Activation Type	0x0	0x4	00000001
Version	0x4	0x4	00000002	1 or 2(current)
Account ID	0x8	0x8	AB CD EF 01 02 34 78 91	personal PSN account ID
Primary Key Table	0x10	0x800	N.A	Encrypted RIF keys
Unknown1	0x810	0x40	N.A
OpenPsId	0x850	0x10	N.A	Result from _sceKernelGetOpenPsId() in the SceSblAimgr Module
Unknown3	0x860	0x10	N.A	Encrypted_data for v.1 / Padding for v.2
Unknown4	0x870	0x10	N.A	Encrypted_data for v.1 / Time_Stamp for v.2
Secondary Table	0x880	0x650	N.A
RSA Signature	0xED0	0x100	N.A	RSA Public Key for RIF type 0 and 1
Unknown Sig	0xFD0	0x40	N.A	params are unknown
ECDSA Signature	0x1010	0x28	N.A	pub=vsh_pub, ctype=0x02(vsh_curves)

The Primary Key table is unique per PSN ID. It is encrypted ECB with the PSID of each console authorized for that PSN ID.