HaLo Key Slots

Key slot no.	Since ver.	Default	Curve	Features
0x01	01.C1	✔️	secp256k1
0x02	01.C1	✔️	secp256k1	Raw digest prohibited
0x03-0x05	01.C7	❌	secp256k1
0x06-0x07	01.C7	❌	secp256k1	Mandatory password
0x08-0x09	01.C8	❌	secp256k1	Mandatory password, backupable
0x61	01.D1	❌	Baby JubJub
0x62	01.D1	✔️	Baby JubJub	Raw digest prohibited

Explanation

Key slot no. - number of the key slot (in hex, base 16);
Since ver. - minimal HaLo version to support the selected key slot;
Default - whether the key slot is securely generated by default (at the factory);
Curve - ECDSA curve used by the key pair;
Flags:
- Raw digest prohibited - the key slot doesn't accept sign command, although it will accept sign_challenge and sign_random commands;
- Mandatory password - the key must be generated with the password set, the password may be changed later, but can never be completely removed;
- Backupable - the key on this slot can be backed up on another HaLo tag, the key can be imported onto this slot if the slot is not already occupied;