keyAlias

The unique key alias generated from the key ID using SHA-256 hashing.

This property generates a consistent, URL-safe Base64 encoded alias from the provided key ID. The hashing ensures that:

• Key IDs are transformed into valid KeyStore aliases

• The same key ID always produces the same alias

• Sensitive key ID information is not directly exposed in the KeyStore

• The alias is URL-safe and doesn't contain padding characters

The alias is computed lazily and cached for performance.