EKU TsingYao Device - 清曜设备证书扩展密钥用法 —— 仅用于设备身份鉴别与安全通信，不得用于服务器认证、代码签名或邮件

Go back Parent node: Eku - 扩展密钥用法（EKU）弧 —— 用于限定证书用途范围的清曜私有 EKU 标识 (1.3.6.1.4.1.59719.5.3)

Technical information

Dot notation:	`1.3.6.1.4.1.59719.5.3.1`
ASN.1 notation:	`{ iso(1) identified-organization(3) dod(6) internet(1) private(4) enterprise(1) tsingyao(59719) pki-certificate-system(5) eku(3) eku-tsingyao-device(1) }`
OID-IRI notation:	`/ISO/Identified-Organization/6/1/4/1/TsingYao/PKICertificateSystem/Eku/EkuTsingyaoDevice`
WEID notation:	`weid:P-1A2V-5-3-1-3`
DER encoding:	`06:0B:2B:06:01:04:01:83:D2:47:05:03:01`

Description

English:
Extended Key Usage (EKU) for TsingYao device certificates, indicating that the certificate may only be used for identity authentication and secure communication of TsingYao devices and shall not be used for server authentication, code signing or email purposes.
Status: registered but unused. No certificate has carried this EKU; when used, place it together with the device certificate policy (1.3.6.1.4.1.59719.5.1.230) and the device certificate type (1.3.6.1.4.1.59719.5.300). The unused state shall be re-verified at each revision of this file.
Recommendation: combine this private EKU with the standard client authentication EKU where device authentication is performed over TLS, so that standard TLS stacks accept the certificate while TsingYao components apply the stricter device-only restriction.
See also: 1.3.6.1.4.1.59719.5.3, 1.3.6.1.4.1.59719.5.300, 1.3.6.1.4.1.59719.5.1.230.
Verification: 2026-10-22 — this arc and all its sub-ordinates are confirmed unused; re-verify the unused state at each revision of this file.

中文:
清曜设备证书扩展密钥用法，表示该证书仅可用于清曜设备的身份鉴别与安全通信，不得用于服务器认证、代码签名或邮件等用途。
状态：已注册但未使用。尚未有证书携带该 EKU；使用时应与设备证书策略（1.3.6.1.4.1.59719.5.1.230）及设备证书类型（1.3.6.1.4.1.59719.5.300）一并出现。本文件每次修订时须重新核验该未使用状态。
建议：设备通过 TLS 完成认证时，应将本私有 EKU 与标准客户端认证 EKU 并用，使标准 TLS 栈接受该证书，同时由清曜组件施加更严格的设备专用限制。
关联节点：1.3.6.1.4.1.59719.5.3、1.3.6.1.4.1.59719.5.300、1.3.6.1.4.1.59719.5.1.230。
核验：2026-10-22 —— 本弧及其全部下级标识均确认未使用，本文件每次修订时须重新核验该未使用状态。

Registration Authority

tsingyao
E-Mail: op@tsingyao.net
JunQing Gu
TsingYao Technology Limited

The RA does not want to publish their personal information.

Subordinate objects

ID	Base36	ASN.1 IDs (comma sep.)	IRI IDs (comma sep.)	RA	Comment	Created	Updated
No items available

Alternative Identifiers

Identifier	Description
aid:D276000186B200054278A5EC3FC78F65 (No PIX allowed)	OIDplus Information Object Application Identifier (ISO/IEC 7816)
guid:4278a5ec-0000-8000-a6d3-a8e82917d43d	OIDplus Information Object Custom UUID (RFC 9562)
guid:21bdf302-2395-324f-a37d-dd84e127b4b2	Name based version 3 / MD5 UUID with namespace UUID_NAMEBASED_NS_OID
guid:77b2bdb1-66ff-5349-b44e-c87a547c7641	Name based version 5 / SHA1 UUID with namespace UUID_NAMEBASED_NS_OID
mac:E2-CA-3F-C7-8F-65	OIDplus Information Object MAC address, Unicast (AAI)
mac:E3-CA-3F-C7-8F-65	OIDplus Information Object MAC address, Multicast (AAI)
weid:P-1A2V-5-3-1-3	WEID notation
x500dn:/dc=com/dc=example/cn=oidplus/1.3.6.1.4.1.37476.2.5.2.9.4.1=1115203052/1.3.6.1.4.1.37476.2.5.2.9.4.2=1070042981	OIDplus Information Object X.500 DN