University of Exeter

exeter.ac.uk · GB · Issued by Sectigo Limited

UK university providing higher education and research

★★★★ 7/10EducationEstablished Russell Group university, well-known in UK academic sector

PrecertExpires in 11 monthsCMCPrior UseASN.1 crt.sh

Certificate Summary

Fingerprint (SHA-256)7117602a15f1a8a7430764d716d0d4665aa9127458e590656dd610ecb163ebe1

Serial Number60:36:60:2a:e8:fd:46:f6:e0:4d:bf:3e:1f:6f:da:8f

Issued2026-02-20

Expires2027-02-20

Intermediate CASectigo Limited

SubjectUniversity of Exeter, GB

SANsexeter.ac.uk

CT LogGorgon (DigiCert) #31598 · 2026-02-20 00:27 UTC (24 days ago)

Certificate Lint

2 errors1 warning19 passed

2 errors1 warning1 notice19 passed

MCR (Mark Certificate Requirements)2 fails

✓

EKU must contain BIMI OIDMCR §7.1.2.7 ↗

e_bimi_eku_present

✓

EKU must contain only BIMI OIDMCR §7.1.2.7 ↗

e_bimi_eku_single

✓

Name Constraints must not be presentMCR §7.1.2.7 ↗

e_bimi_no_name_constraints

✗

Key Usage must include digitalSignatureerrorMCR §7.1.2.7 ↗

Key Usage extension is missing

e_bimi_key_usage

✓

Validity period must not exceed 825 daysMCR §6.3.2 ↗

e_bimi_validity_period

✗

SCT List extension must be presenterrorMCR §7.1.2.7 ↗

SCT List extension is missing

e_bimi_sct_present

✓

Pilot ID extension must not be presentMCR §7.1.2.7 ↗

e_bimi_pilot_id_absent

✓

BIMI General Policy OID must be presentMCR §7.1.6.4 ↗

e_bimi_general_policy

✓

CPS URL must be present in certificate policiesMCR §7.1.6.4 ↗

e_bimi_cps_url_present

✓

Mark type must be present and validMCR §7.1.4.2.2 ↗

e_bimi_mark_type_valid

✓

Prior Use Source must be present for Prior Use MarkMCR §7.1.4.2 ↗

e_bimi_mark_type_dn_prior_use_source

✓

Logotype extension must be presentMCR §7.1.2.7 ↗

e_bimi_logotype_present

✓

Logotype must contain data: URIMCR §7.1.2.7 ↗

e_bimi_logotype_data_uri

✓

SVG must be gzip-compressedMCR §7.1.2.7 ↗

e_bimi_svg_compressed

✓

SVG must conform to SVG Tiny PSMCR §7.1.2.7 ↗

e_bimi_svg_tiny_ps

—

RSA key must be at least 2048 bitsMCR §6.1.5 ↗

w_bimi_rsa_key_size

✓

ECDSA key must use P-256 or P-384MCR §6.1.5 ↗

w_bimi_ecdsa_curve

✓

Signature hash should be SHA-256 or strongerMCR §6.1.5 ↗

w_bimi_sig_hash

RFC 5280 (X.509)

✓

Certificate must not be a CARFC 5280 §4.2.1.9 ↗

e_bimi_basic_constraints

—

Key Usage extension must be criticalRFC 5280 §4.2.1.3 ↗

e_bimi_key_usage_critical

CA/Browser Forum1 fail

✓

Serial number should contain at least 64 bits of entropyCABF ↗

w_bimi_serial_entropy

✗

CA-specific policy OID should be presentwarningCABF ↗

No known CA-specific VMC policy OID found

w_bimi_ca_policy_oid

RFC 3709 (Logotype)1 fail

✓

Logotype extension must not be criticalRFC 3709 §2.1 ↗

e_bimi_logotype_not_critical

✓

Logotype must contain a hashRFC 3709 §2.1 ↗

e_bimi_logotype_hash_present

✗

Logotype hash should use SHA-256noticeRFC 3709 §2.1 ↗

Logotype uses SHA-1 hash; SHA-256 recommended for stronger integrity

n_bimi_logotype_hash_sha256

Embedded Logo

SVG Hash1e35666b

Revocation Status

No OCSP or CRL endpoints found in this certificate's extensions.

Certificate Details

Serial Number: 60:36:60:2a:e8:fd:46:f6:e0:4d:bf:3e:1f:6f:da:8f

Issuer:

commonName: Sectigo Limited VMC Issuing RSA CA 1

organizationName: Sectigo Limited

Validity:

Not Before: Fri, 20 Feb 2026 00:17:15 UTC

Not After: Sat, 20 Feb 2027 00:17:15 UTC

Subject:

organizationName: University of Exeter

countryName: GB

stateOrProvinceName: Devon

localityName: Exeter

BIMI Mark Type: Prior Use Mark

BIMI Prior Use Source: exeter.ac.uk

Jurisdiction Country: GB

Business Category: Private Organization

Serial Number: RC000653

Street Address: Northcote House, The Queen's Drive

Subject Alternative Names:

DNS:exeter.ac.uk

X509v3 Extensions:

Subject Key Identifier(2.5.29.14):61:85:94:DB:78:F7:84:78:16:5A:03:03:51:B4:02:F4:A7:A1:0F:B5

Subject Alternative Name(2.5.29.17):exeter.ac.uk

Basic Constraints(2.5.29.19):CA: false

CRL Distribution Points(2.5.29.31):http://crls.ssl.com/Sectigo-VMC-I-R1.crl

Certificate Policies(2.5.29.32):1.3.6.1.4.1.38064.1.3.8 https://www.ssl.com/repository BIMI Mark Certificate General Policy

Authority Key Identifier(2.5.29.35):88:24:A8:65:B8:67:36:67:A9:CD:C4:EC:87:FD:E0:1E:75:14:5E:9A

Extended Key Usage(2.5.29.37):Brand Indicator for Message Identification (BIMI)

Authority Information Access(1.3.6.1.5.5.7.1.1):CA Issuers: http://cert.ssl.com/Sectigo-VMC-I-R1.cer

Logotype (BIMI)(1.3.6.1.5.5.7.1.12):Embedded SVG logotype (see Logo section)

CT Precert Poison(1.3.6.1.4.1.11129.2.4.3):Precertificate poison (critical)

ASN.1 Structure

Certificate Chain

Leaf CertificateUniversity of Exeter

Position 0

Subject: C=GB, ST=Devon, L=Exeter, O=University of Exeter, 2.5.4.5=RC000653, 1.3.6.1.4.1.53087.1.13=Prior Use Mark, 1.3.6.1.4.1.53087.5.1=exeter.ac.uk, 2.5.4.15=Private Organization, 2.5.4.9=Northcote House\, The Queen's Drive, 1.3.6.1.4.1.311.60.2.1.3=GB

Issuer: C=GB, O=Sectigo Limited, CN=Sectigo Limited VMC Issuing RSA CA 1

Serial: 60:36:60:2a:e8:fd:46:f6:e0:4d:bf:3e:1f:6f:da:8f

SHA-256: 7117602a15f1a8a7...b163ebe1

2026-02-20 – 2027-02-20

Intermediate CASectigo Limited

Position 1

Subject: C=GB, O=Sectigo Limited, CN=Sectigo Limited VMC Issuing RSA CA 1

Issuer: C=US, O=SSL Corporation, CN=SSL.com VMC RSA Root CA 2024

Serial: 66:47:87:75:32:86:9c:ad:5d:64:24:63:8d:9f:be:a1

SHA-256: 600ee4992bc587eb...681aa5e0

2025-11-13 – 2035-11-11

Root CASSL Corporation

Position 2

Subject: C=US, O=SSL Corporation, CN=SSL.com VMC RSA Root CA 2024

Issuer: C=US, O=SSL Corporation, CN=SSL.com VMC RSA Root CA 2024

Serial: 70:94:6f:ae:be:b3:cc:e0:d8:6f:b8:76:77:80:61:cb

SHA-256: 8f9d1b7698886782...154bd30d

2024-02-19 – 2048-02-13

Raw PEM