lab.a-star.edu.sg
- Agency for Science, Technology and Research -
Issued by Entrust Certification Authority - L1K
About this certificate
This digital certificate with serial number 54:c7:18:87:1d:ba:25:95:d2:55:a0:94:d1:68:fe:88 was issued on by Entrust, Inc..
This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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 certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
- Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)
Agency for Science, Technology and Research
Organization:
Agency for Science, Technology and Research
Locality:
Singapore
Country: SG
Country: SG
Entrust, Inc.
Organization:
Entrust, Inc.
Organization unit: See www.entrust.net/legal-terms
Organization unit: (c) 2012 Entrust, Inc. - for authorized use only
Organization unit: See www.entrust.net/legal-terms
Organization unit: (c) 2012 Entrust, Inc. - for authorized use only
Country:
US
This certificate will expire on
Certificate Details
Serial Number (hex): 54:c7:18:87:1d:ba:25:95:d2:55:a0:94:d1:68:fe:88Serial Number (int): 112688916203613894066321369556652195464
Serial Number lenght: 127 bits, 16 octets
SubjectKeyId: 0c:85:68:e9:5d:ef:7a:01:eb:3c:77:92:9c:c7:13:c4:df:c2:41:83
AuthorityKeyId: 82:a2:70:74:dd:bc:53:3f:cf:7b:d4:f7:cd:7f:a7:60:c6:0a:4c:bf
Fingerprint (sha1): 9c:71:dd:19:76:c8:88:49:62:1d:22:2f:79:10:6f:66:ec:80:e6:8e
Fingerprint (sha256): 10:7e:dc:d8:dd:86:93:c7:92:02:6b:e2:e2:8d:c2:d8:2e:c4:48:9f:11:91:77:97:e4:8f:77:c3:ae:76:2f:e0
Issuing Certificate URL: http://aia.entrust.net/l1k-chain256.cer
Revocation information
OCSP Server: http://ocsp.entrust.netCRL Distribution Point: http://crl.entrust.net/level1k.crl
Check the revocation status for certificate lab.a-star.edu.sg
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for lab.a-star.edu.sg
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
10 extensions
No
unhandled critical extensions
CA Certificate
This is not a CA certificate
Subject Alternative Names
lab.a-star.edu.sg
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Certificate
The complete raw certificate details for lab.a-star.edu.sg in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFIjCCBAqgAwIBAgIQVMcYhx26JZXSVaCU0Wj+iDANBgkqhkiG9w0BAQsFADCB ujELMAkGA1UEBhMCVVMxFjAUBgNVBAoTDUVudHJ1c3QsIEluYy4xKDAmBgNVBAsT H1NlZSB3d3cuZW50cnVzdC5uZXQvbGVnYWwtdGVybXMxOTA3BgNVBAsTMChjKSAy MDEyIEVudHJ1c3QsIEluYy4gLSBmb3IgYXV0aG9yaXplZCB1c2Ugb25seTEuMCwG A1UEAxMlRW50cnVzdCBDZXJ0aWZpY2F0aW9uIEF1dGhvcml0eSAtIEwxSzAeFw0y NDAxMjYwNjI1MDhaFw0yNTAxMjYwNjI1MDdaMHMxCzAJBgNVBAYTAlNHMRIwEAYD VQQHEwlTaW5nYXBvcmUxNDAyBgNVBAoTK0FnZW5jeSBmb3IgU2NpZW5jZSwgVGVj aG5vbG9neSBhbmQgUmVzZWFyY2gxGjAYBgNVBAMTEWxhYi5hLXN0YXIuZWR1LnNn MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0Gq52N02QMEsJnHBXxCJ oO+7HDU0utPBlm4X9YcxyLOwRQvZknQso3hKhD6CRqwXl7m4CEcejAoEGiQOIzZI NA1K3DcCjTAVjL/0KLF8kEjPRb9LTU0Gssa7pZL/O9xxve2abxy5GWIIU5dABxOe eUIapW+qlFh4LJ+YAK2rwv9HUdnulVRbAp4EvPK2vnx/7r49aBVy8sz474eR1gPE 9XNv7H6QJshipG8orA2a49hTWfG6LhMq7KHWZeSR288mNzjsi/0YrEOuqRMnsZAI B4v9RCcuTSUVerpMitLGKJ+Fev/whORcQcDMDc/QvK/s/dUrv4Bl4AJy3b+8wD4/ MQIDAQABo4IBaDCCAWQwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUDIVo6V3vegHr PHeSnMcTxN/CQYMwHwYDVR0jBBgwFoAUgqJwdN28Uz/Pe9T3zX+nYMYKTL8waAYI KwYBBQUHAQEEXDBaMCMGCCsGAQUFBzABhhdodHRwOi8vb2NzcC5lbnRydXN0Lm5l dDAzBggrBgEFBQcwAoYnaHR0cDovL2FpYS5lbnRydXN0Lm5ldC9sMWstY2hhaW4y NTYuY2VyMDMGA1UdHwQsMCowKKAmoCSGImh0dHA6Ly9jcmwuZW50cnVzdC5uZXQv bGV2ZWwxay5jcmwwHAYDVR0RBBUwE4IRbGFiLmEtc3Rhci5lZHUuc2cwDgYDVR0P AQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjATBgNVHSAE DDAKMAgGBmeBDAECAjATBgorBgEEAdZ5AgQDAQH/BAIFADANBgkqhkiG9w0BAQsF AAOCAQEAmNEDhmSZXLWdfFIMRBmNxSkr2avzUmbsx5JaQsVT6X4kwZspRk5L+uwl L9LI74shf/T6enY+rqjZCJLTAumlS/4CuyWHqoup6MM9HMN6HrVZlMVH1dEkpNLn yiA24P0LG0tDqdHxWhR1eIX70PIMnjuoU4DVMihPw3ayh97u31RY+ZDGJNEdW2lL u9D2v/noWN9mYKm0tgk5dq0cl1BsMJI+GDgmQqICVdWIMbaNBQunTz6ki7Vvakvv 4lxbcLF2kXlheuQsDrT13YBdkDT+QcRoXe7Mi5uP9ABCCo7Nc3naA0Ls/H7lNm3r lPO+wAZtuWGYNO3v8dqm2Oh0kDA8Mw== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0Gq52N02QMEsJnHBXxCJ oO+7HDU0utPBlm4X9YcxyLOwRQvZknQso3hKhD6CRqwXl7m4CEcejAoEGiQOIzZI NA1K3DcCjTAVjL/0KLF8kEjPRb9LTU0Gssa7pZL/O9xxve2abxy5GWIIU5dABxOe eUIapW+qlFh4LJ+YAK2rwv9HUdnulVRbAp4EvPK2vnx/7r49aBVy8sz474eR1gPE 9XNv7H6QJshipG8orA2a49hTWfG6LhMq7KHWZeSR288mNzjsi/0YrEOuqRMnsZAI B4v9RCcuTSUVerpMitLGKJ+Fev/whORcQcDMDc/QvK/s/dUrv4Bl4AJy3b+8wD4/ MQIDAQAB -----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 112688916203613894066321369556652195464 . . . . . . . . [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 'US' . . . . . . . . . . . . [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 'Entrust, Inc.' . . . . . . . . . . . . [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 'See www.entrust.net/legal-terms' . . . . . . . . . . . . [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 '(c) 2012 Entrust, Inc. - for authorized use only' . . . . . . . . . . . . [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 'Entrust Certification Authority - L1K' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-26 06:25:08 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-01-26 06:25:07 +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 2.5.4.6 (countryName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'SG' . . . . . . . . . . . . [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 'Singapore' . . . . . . . . . . . . [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 'Agency for Science, Technology and Research' . . . . . . . . . . . . [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 'lab.a-star.edu.sg' . . . . . . . . [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 26310195967938600009227112930491524514376508774240363609326551693299186723894306162735581663667234856681881868436777963319450105632347047744311461103293310323644370857270630953284867604996521191591135899742969582242223346927954410423696814862257772389815935190680237734462199239650868477863415704559670215469615736184831845323045836762583559662155630352894727250951552243613598522460978417759382700985263900020952625818563935477963269783343888892761800373644295538707554613895674781831937028139069720873653340827554389898299047163785932661541760142119550655160572115661342047688273466469001295441900492059813435293489 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.19 (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 2.5.29.14 (subjectKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes) 0c8568e95def7a01eb3c77929cc713c4dfc24183 . . . . . . . . . . . . . . . . [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 82a27074ddbc533fcf7bd4f7cd7fa760c60a4cbf . . . . . . . . . . . . . . . . [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 (92 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.1 (ocsp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://ocsp.entrust.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://aia.entrust.net/l1k-chain256.cer' . . . . . . . . . . . . . . . . [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 (44 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.entrust.net/level1k.crl' . . . . . . . . . . . . . . . . [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 (21 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'lab.a-star.edu.sg' . . . . . . . . . . . . . . . . [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 2.5.29.37 (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 (12 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.23.140.1.2.2 (Organization Validation Certificates Policy) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.11129.2.4.3 (CT Precertificate Poison) . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL . . . . [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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