---
title: Certificate Item Attribute Constants
framework: security
role: collectionGroup
role_heading: API Collection
path: security/certificate-item-attribute-constants
---

# Certificate Item Attribute Constants

Use these four character values to indicate certificate item attributes.

## Topics

### Constants

- [kSecSubjectItemAttr](security/ksecsubjectitemattr.md)
- [kSecIssuerItemAttr](security/ksecissueritemattr.md)
- [kSecSerialNumberItemAttr](security/ksecserialnumberitemattr.md)
- [kSecPublicKeyHashItemAttr](security/ksecpublickeyhashitemattr.md)
- [kSecSubjectKeyIdentifierItemAttr](security/ksecsubjectkeyidentifieritemattr.md)
- [kSecCertTypeItemAttr](security/kseccerttypeitemattr.md)
- [kSecCertEncodingItemAttr](security/kseccertencodingitemattr.md)