| Abbreviation | Content |
|---|---|
| S | Initial seed of pseudo-random number |
| Pns | The nth pseudo-random number value |
| GIDn | The n-th group ID |
| Gn | n-th group |
| H(•) | Hashed result value |
| K | Pre-shared encryption key |
| E(•)K | Encrypted result value using K as a key |
| DTn | n-th time value |