opac.ntu.ac.uk

Issued by TERENA SSL CA 2

About this certificate

This digital certificate with serial number 27:09:18:d7:d0:81:8d:57:d6:f2:6f:44:1f:a7:86:6b was issued on by TERENA.

This certificate has already expired and will cause a warning or error message in the browser it's still listed on this site to allow you to look back on previously issued certificates. If we have found any compliance issues with this certificate they will be shown below. I hope this certificate review is providing you the detailed information in a simple form you where looking for.


We have idenified some issues with this certificate:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=opac.ntu.ac.uk,OU=Domain Control Validated

TERENA

Organization: TERENA
State / Province: Noord-Holland
Locality: Amsterdam
Country: NL

This certificate has expire since

Certificate Details

Serial Number (hex): 27:09:18:d7:d0:81:8d:57:d6:f2:6f:44:1f:a7:86:6b
Serial Number (int): 51887126383753461646427452061734372971
Serial Number lenght: 126 bits, 16 octets

SubjectKeyId: 00:ab:5b:46:de:c7:9c:6f:02:39:1e:2c:ef:6b:b0:22:bd:47:4b:00
AuthorityKeyId: 5b:d0:8a:1c:9a:32:5b:e0:b5:dd:96:54:1b:e1:86:28:b0:fd:b6:bd

Fingerprint (sha1): e6:12:67:c9:df:fd:6b:b3:9d:45:32:50:6c:60:de:b0:68:00:39:c1
Fingerprint (sha256): 12:52:d9:fe:f5:11:b9:c0:23:eb:90:3e:32:22:7f:19:a2:df:93:cc:3e:c5:fe:14:14:0e:8d:67:16:60:19:24

Issuing Certificate URL: http://crt.usertrust.com/TERENASSLCA2.crt

Revocation information

OCSP Server: http://ocsp.usertrust.com
CRL Distribution Point: http://crl.usertrust.com/TERENASSLCA2.crl

Check the revocation status for certificate opac.ntu.ac.uk

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for opac.ntu.ac.uk

Public Key Algorithm

RSA

Key Size

2048

Signature Algorithm

SHA256 with RSA

Key Usage

Digital Signature
Key Encipherment

Extended Key Usages

Server Authentication
Client Authentication

Extensions

9 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

opac.ntu.ac.uk

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Certificate

The complete raw certificate details for opac.ntu.ac.uk in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvnf/aRf1GbceLPqGyoen
56SnFUorm0OPWODlSwaeAux9yKhMT7a8pdaAe1uD/a38wAFcobkd64//mOwF4CyZ
vw7YZBxKCtoveiadpTpXeuA6WTAlmgelN0rqeTYrhsqeVF0cxM3qJd0CiJoecd4q
duaKZl+wi/YherO3lfo/FEnSYnJbWH/cx0fpLf29DZRrg7uEuORwuXXbpn+Ww7wg
5bJhORmX8393IcbcXCr4YcIOOvYS+C9ia0ZNiCi+6PKwK1u9QTzLn456HrhpjxP0
B1qBXwF/7bVZvF3rX4JSMVpuCG8c4RXFGo+dz/XtMv1Q7+eJR18Oq8/j3HGSIcsI
YQIDAQAB
-----END PUBLIC KEY-----

ASN.1 decoded

 [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . [c:0|t:2|false] INTEGER 2
 . . . . . . . . [c:0|t:2|false] INTEGER 51887126383753461646427452061734372971
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption)
 . . . . . . . . . . . . [c:0|t:5|false] NULL 
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.6 (countryName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'NL'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.8 (stateOrProvinceName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Noord-Holland'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.7 (localityName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Amsterdam'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.10 (organizationName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'TERENA'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'TERENA SSL CA 2'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2015-01-16 00:00:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-01-15 23:59:59 +0000 UTC
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.11 (organizationalUnitName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Domain Control Validated'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'opac.ntu.ac.uk'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.1 (rsaEncryption)
 . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL 
 . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 24044451013525350291666385705458161876983102956536549475831306441352815735831281094579986179518120307413987842472845075598070193059540618604140923991646136568159694614670001728618742223154671854503630125284178243383282311481105319322230768499853203542627957338608736024267148170772106766075800929202578809156444775575257831375634956985424621803054031742985550560125734301339759459207817349938521670601592328399231643277998604403102436918185764876981619548169785868722617793645222923366654835800985413949469587391761102656013507182563885739512059263729259654074398087523862434806587213186606284864728344396584574453857
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 65537

 . . . . . . . . [c:2|t:3|true] ORAddress 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35 (authorityKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 5bd08a1c9a325be0b5dd96541be18628b0fdb6bd
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.14 (subjectKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							00ab5b46dec79c6f02391e2cef6bb022bd474b00
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.15 (keyUsage)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (4 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (3 bits)
							05a0
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19 (basicConstraints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.37 (extKeyUsage)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.1 (serverAuth)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2 (clientAuth)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32 (certificatePolicies)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (27 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.6449.1.2.2.29
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.23.140.1.2.1 (Domain Validation Certificates Policy)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31 (cRLDistributionPoints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (51 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crl.usertrust.com/TERENASSLCA2.crl'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1 (authorityInfoAccess)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (96 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2 (caIssuers)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crt.usertrust.com/TERENASSLCA2.crt'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.1 (ocsp)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://ocsp.usertrust.com'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17 (subjectAltName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (18 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'opac.ntu.ac.uk'
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption)
 . . . . . . . . [c:0|t:5|false] NULL 
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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