ASYMKEYPROPERTY (Transact-SQL)
Applies to: 
SQL Server
Azure SQL Database
Azure SQL Managed Instance
This function returns the properties of an asymmetric key.
Transact-SQL syntax conventions
Syntax
ASYMKEYPROPERTY (Key_ID , 'algorithm_desc' | 'string_sid' | 'sid')
Arguments
Key_ID
The Key_ID of an asymmetric key in the database. If you only know the key name, use ASYMKEY_ID to find the Key_ID. Key_ID has data type int.
'algorithm_desc'
Specifies that the output returns the algorithm description of the asymmetric key. Only available for asymmetric keys created from an EKM module.
'string_sid'
Specifies that the output returns the SID of the asymmetric key, in nvarchar() format.
'sid'
Specifies that the output returns the SID of the asymmetric key in binary format.
Return types
sql_variant
Permissions
Requires appropriate permission(s) on the asymmetric key, and requires that the caller has not been denied VIEW permission on the asymmetric key. See CREATE ASYMMETRIC KEY (Transact-SQL) for more information about asymmetric key permissions.
Examples
The following example returns the properties of the asymmetric key of Key_ID 256.
SELECT
ASYMKEYPROPERTY(256, 'algorithm_desc') AS Algorithm,
ASYMKEYPROPERTY(256, 'string_sid') AS String_SID,
ASYMKEYPROPERTY(256, 'sid') AS SID ;
GO
See also
CREATE ASYMMETRIC KEY (Transact-SQL)
ALTER ASYMMETRIC KEY (Transact-SQL)
DROP ASYMMETRIC KEY (Transact-SQL)
SIGNBYASYMKEY (Transact-SQL)
VERIFYSIGNEDBYASYMKEY (Transact-SQL)
Encryption Hierarchy
sys.asymmetric_keys (Transact-SQL)
Security Catalog Views (Transact-SQL)
ASYMKEY_ID (Transact-SQL)
SYMKEYPROPERTY (Transact-SQL)