selfservice.a-star.edu.sg

Issued by Entrust Certification Authority - L1K

About this certificate


This digital certificate with serial number 50:d4:9c:7e was issued on by Entrust, Inc. .

While the 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.

Cerificate errors/warnings *beta

  • ERROR: KeyUsage extension SHOULD be marked as critical when present
  • ERROR: stateOrProvinceName is required if organizationName is set

Agency for Science, Technology and Research

Organization: Agency for Science, Technology and Research
Locality: Singapore
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
Locality: Singapore
Country: SG

Time since certificate expired

This certificate has expire since

Certificate Details

Serial Number (hex): 50:d4:9c:7e
Serial Number (int): 1356110974
Serial Number lenght: 31 bits, 4 octets

SubjectKeyId: 37:7c:98:7f:d0:39:3b:1e:15:80:da:98:0a:05:3f:88:7e:68:c6:d3
AuthorityKeyId: 82:a2:70:74:dd:bc:53:3f:cf:7b:d4:f7:cd:7f:a7:60:c6:0a:4c:bf

Fingerprint (sha1): 35:ae:3c:91:7b:81:d0:3a:98:a9:16:c6:10:f2:94:ac:76:56:ad:ac
Fingerprint (sha256): 71:d0:2a:fd:04:56:70:aa:5b:8b:64:b9:c5:84:8e:22:43:fc:84:6b:9d:f7:7d:14:88:41:b7:1d:39:95:0f:4c

Issuing Certificate URL: http://aia.entrust.net/l1k-chain256.cer

Revocation information

OCSP Server: http://ocsp.entrust.net
CRL Distribution Point: http://crl.entrust.net/level1k.crl

Check the revocation status for the current certificate on selfservice.a-star.edu.sg
1
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details about this certificate


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

This certificate doesn't contain any other subject alternative names besides the common name of the subject: selfservice.a-star.edu.sg

Certificate

The complete raw certificate details in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE----- MIIFQzCCBCugAwIBAgIEUNScfjANBgkqhkiG9w0BAQsFADCBujELMAkGA1UEBhMC VVMxFjAUBgNVBAoTDUVudHJ1c3QsIEluYy4xKDAmBgNVBAsTH1NlZSB3d3cuZW50 cnVzdC5uZXQvbGVnYWwtdGVybXMxOTA3BgNVBAsTMChjKSAyMDEyIEVudHJ1c3Qs IEluYy4gLSBmb3IgYXV0aG9yaXplZCB1c2Ugb25seTEuMCwGA1UEAxMlRW50cnVz dCBDZXJ0aWZpY2F0aW9uIEF1dGhvcml0eSAtIEwxSzAeFw0xNTA3MDIwMTI4Mzha Fw0xNjA3MDMwNDA3NDZaMHsxCzAJBgNVBAYTAlNHMRIwEAYDVQQHEwlTaW5nYXBv cmUxNDAyBgNVBAoTK0FnZW5jeSBmb3IgU2NpZW5jZSwgVGVjaG5vbG9neSBhbmQg UmVzZWFyY2gxIjAgBgNVBAMTGXNlbGZzZXJ2aWNlLmEtc3Rhci5lZHUuc2cwggEi MA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCIoLHePo48cs/cVSsmaSobo0qS qiwa5qjPKdvvTkClwJ7oJtoCzShwFIyxYKmb3Lf1X2yU9aoxQ+Pd2ZxPZXzXL2aG wtYhY3yj46q+OxhTJ9nrTfOOLUA+Tuh4jEBp3U5gmtAhoCGfZTpvDGYX9VcrEMu9 +KUy4ltly2SbwRE3Tm1kvQt0EZcKNw8dP7c0vsEtMA8WXijqaQD2vHAHD74+oU3W r/EE+Grgsfb8BxJHTzPRMHYAOttu8jReNnGCEBeikZ4WV/jMLeTGEj7yMMctfHgH buuLKyPfTEQK5ovgpnurPTlE0WtrRHhpTkY3SvGuwroOLAaSugnaXA/l6bBvAgMB AAGjggGNMIIBiTALBgNVHQ8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsG AQUFBwMCMDMGA1UdHwQsMCowKKAmoCSGImh0dHA6Ly9jcmwuZW50cnVzdC5uZXQv bGV2ZWwxay5jcmwwSwYDVR0gBEQwQjA2BgpghkgBhvpsCgEFMCgwJgYIKwYBBQUH AgEWGmh0dHA6Ly93d3cuZW50cnVzdC5uZXQvcnBhMAgGBmeBDAECAjBoBggrBgEF BQcBAQRcMFowIwYIKwYBBQUHMAGGF2h0dHA6Ly9vY3NwLmVudHJ1c3QubmV0MDMG CCsGAQUFBzAChidodHRwOi8vYWlhLmVudHJ1c3QubmV0L2wxay1jaGFpbjI1Ni5j ZXIwJAYDVR0RBB0wG4IZc2VsZnNlcnZpY2UuYS1zdGFyLmVkdS5zZzAfBgNVHSME GDAWgBSConB03bxTP8971PfNf6dgxgpMvzAdBgNVHQ4EFgQUN3yYf9A5Ox4VgNqY CgU/iH5oxtMwCQYDVR0TBAIwADANBgkqhkiG9w0BAQsFAAOCAQEAf8OCn6+h4vx8 8eNBD6LYMD7NIyDU6oUHZqoSQPKbkWP/1LkANlfUFfiYp9gP1f5WlIwS8ZhJkOhk XLByzvzXKi3my/21iUrdjgph0GQUfQZraHuBUYA4qRhpmtLOglJeJjNBv6/67Nk7 USEMkqIEAkIWfg6v5kOF9AMSHHjsw34tyfLsbGvwmyBA4hfm/sLjDFXyxe9CeZxo JlBqeZL9/TW0W+YQot9BLO1k4yyJ6OyzTiCpUZOi70YtuYV8egLvWtJ3G/+3VwMl KGwe7QKpCgoehnUhRWc3km7bMYHcNgDXrG1cLonJD5kbGVOV6pFajarbC/CTE6jI 5xDfCxL4Uw== -----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAiKCx3j6OPHLP3FUrJmkq G6NKkqosGuaozynb705ApcCe6CbaAs0ocBSMsWCpm9y39V9slPWqMUPj3dmcT2V8 1y9mhsLWIWN8o+OqvjsYUyfZ603zji1APk7oeIxAad1OYJrQIaAhn2U6bwxmF/VX KxDLvfilMuJbZctkm8ERN05tZL0LdBGXCjcPHT+3NL7BLTAPFl4o6mkA9rxwBw++ PqFN1q/xBPhq4LH2/AcSR08z0TB2ADrbbvI0XjZxghAXopGeFlf4zC3kxhI+8jDH LXx4B27riysj30xECuaL4KZ7qz05RNFra0R4aU5GN0rxrsK6DiwGkroJ2lwP5emw bwIDAQAB -----END PUBLIC KEY-----

ASN1 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 1356110974 . . . . . . . . [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 2015-07-02 01:28:38 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2016-07-03 04:07:46 +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 'selfservice.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 17247651033369906903593458527000182242661060453734554787310905534114095404710137804207481794103613163671636478588057093318954855866751804041351042420125003324812432598225300464159546594515906899569259164555158031775434543059223727568983780349140967075220409437355451557849121200349631405856525582469864026728826107414882619479749532061441671743929600987998788706252070585587287010022708382363778517904127204218541156319313754884889248435206626544484057990565072751199866396333308721705748441566908163590326750466654436355056519406463047843124680160071980109453140185423810042371116496342161708407287353403385118830703 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.15 (keyUsage) . . . . . . . . . . . . . . . . . . . . [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 2.5.29.31 (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 2.5.29.32 (certificatePolicies) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (68 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.16.840.1.114028.10.1.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.1 (cps) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'http://www.entrust.net/rpa' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 1.3.6.1.5.5.7.1.1 (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 2.5.29.17 (subjectAltName) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (29 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'selfservice.a-star.edu.sg' . . . . . . . . . . . . . . . . [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 2.5.29.14 (subjectKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes) 377c987fd0393b1e1580da980a053f887e68c6d3 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19 (basicConstraints) . . . . . . . . . . . . . . . . . . . . [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 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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