| Subject | English | Chinese |
| el. | personal security identifier | 个人安全［保密］标识符 |
| el. | security association identifier | 安全性关联标识符 |
| el. | security identifier | 安全标识符 |
| comp., MS | security identifier | 安全性識別碼 (In Windows-based systems, a unique value that identifies a user, group, or computer account within an enterprise. Every account is issued a SID when it is created) |