libguides.sim.edu.sg
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:0a:22:55:11:2a:5a:40:8d:6a:e1:f9:9b:e3:5b:9e:1e:58 was issued on by Let's Encrypt.
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=libguides.sim.edu.sg
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:0a:22:55:11:2a:5a:40:8d:6a:e1:f9:9b:e3:5b:9e:1e:58Serial Number (int): 264785316909736264952171787066399432515160
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: a9:0c:60:5e:3b:c4:ca:7c:a0:eb:91:c1:dc:87:3a:79:98:7f:f8:fd
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 21:5b:0a:2c:06:26:b3:03:7b:b8:37:97:b0:20:35:ea:01:0c:0f:a9
Fingerprint (sha256): 77:38:54:8c:0d:2e:3f:27:5c:66:da:77:07:e0:f8:f1:68:c7:f1:08:55:91:fa:e3:c8:1d:06:7a:e9:e6:fc:dd
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate libguides.sim.edu.sg
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for libguides.sim.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
9 extensions
No
unhandled critical extensions
CA Certificate
This is not a CA certificate
Subject Alternative Names
libguides.sim.edu.sg
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Certificate
The complete raw certificate details for libguides.sim.edu.sg in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFYDCCBEigAwIBAgISAwoiVREqWkCNauH5m+Nbnh5YMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODEyMDgxMjM1MThaFw0x OTAzMDgxMjM1MThaMB8xHTAbBgNVBAMTFGxpYmd1aWRlcy5zaW0uZWR1LnNnMIIB IjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAy5EgViHGq+8LqIFNXa6g1BCa rsijxa2WfNrNGKCyfh3xEWB1yWpRJ1VibdGjrtI7uWB+9mcbWgDu5KdcldJhVMSC 6n7zceZUVUIWo/bQlPLbdclAa1l4WPGg9LPKW9XYc5JNCZdXo7mTzUVL84Suyj9d RmNhODW5IjNefia8TLksUILQCzDmO4020NJsjiobLhbPN5/pBWbmOjbcALEHc2oe aPlA40OjAA8OlqvT8ltrWNAQe+NKSN564YMh34gqnoBA5OyOOfeTHKkyM/XFO8hB J7euVx+j8gFvg/Q7OWs0xyvXyEV0mLCVQ/Xm4FImnnH8b+zMpc1nqReP+qhNrwID AQABo4ICaTCCAmUwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMB BggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBSpDGBeO8TKfKDrkcHc hzp5mH/4/TAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEF BQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5j cnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5j cnlwdC5vcmcvMB8GA1UdEQQYMBaCFGxpYmd1aWRlcy5zaW0uZWR1LnNnMEwGA1Ud IARFMEMwCAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0 dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIIBBAYKKwYBBAHWeQIEAgSB9QSB8gDw AHYA4mlLribo6UAJ6IYbtjuD1D7n/nSI+6SPKJMBnd3x2/4AAAFnjgeMbAAABAMA RzBFAiBiSM63E8zT2tRemiovpaEbMD0QNipQK2QeE1kzojQYSgIhALSxzHgzkE50 erKm59cdk7MQryMcfZFZbEo0l6ExYbqzAHYAY/Lbzeg7zCzPC3KEJ1drM6SNYXeP vXWmOLHHaFRL2I0AAAFnjgeMvQAABAMARzBFAiAarz2GqeXhurUMEEhwGM8WdnZy LOA6vCPKk6m+0XXr3AIhAMBUtfGjpBwr1UKfD5tsYN1K9xjCGkBUL5+O3qcxW4ER MA0GCSqGSIb3DQEBCwUAA4IBAQA2pSBOQubNnyPaxnTilAG2t/RCW2otHxJGYoa0 08/94T0dP61EguTjS6q5ufQ/LwyEqXpFl16BjGbOp5Cs8XKeNmJT+03iPxLSN9rk yeueek3ofAz9ggRNfCzx/G4GyhflwIt17K4pjOq5x3Cj+UX+jbUjoaIvX+ro5hpP k6n6AZFAm3qvtJRsn2b+k1AagCjTavWtwxg6tYMc675zzM/bHkMmSTpti8XR426z 2LS8YpD1kWK8La3CYnfv64LZSCtZbjhaerhYmu1I7U4YnM/8bMx90+jWe7hH+lqK v8qvSPqw4oeteoLkMJUCkF8ACgAv+eTObdvIZctCF7MSkmgE -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAy5EgViHGq+8LqIFNXa6g 1BCarsijxa2WfNrNGKCyfh3xEWB1yWpRJ1VibdGjrtI7uWB+9mcbWgDu5KdcldJh VMSC6n7zceZUVUIWo/bQlPLbdclAa1l4WPGg9LPKW9XYc5JNCZdXo7mTzUVL84Su yj9dRmNhODW5IjNefia8TLksUILQCzDmO4020NJsjiobLhbPN5/pBWbmOjbcALEH c2oeaPlA40OjAA8OlqvT8ltrWNAQe+NKSN564YMh34gqnoBA5OyOOfeTHKkyM/XF O8hBJ7euVx+j8gFvg/Q7OWs0xyvXyEV0mLCVQ/Xm4FImnnH8b+zMpc1nqReP+qhN rwIDAQAB -----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 264785316909736264952171787066399432515160 . . . . . . . . [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 'Let's Encrypt' . . . . . . . . . . . . [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 'Let's Encrypt Authority X3' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-12-08 12:35:18 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-03-08 12:35:18 +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 2.5.4.3 (commonName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'libguides.sim.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 25697940360919661491026655949381101943593859810587702717458121384026656803360134173302989994986529926300704363007515371888498374097952881209222634347448055129368176306594284691765708405528375337629953377705186500613416291069903009785591104367607127076697952626615003774185391023986773659243739913664001793440959546506421738617593382633128284585234468315945584279038448777315514717764961020497019353987197442954441147301926498553915030496478150318880654448109932370345800254462076258249481404987246880716641207904040160883772163223473961672714989163383753518118291321208591171069841343685520061055812730658033987243439 . . . . . . . . . . . . . . . . . . . . [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: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 2.5.29.19 (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) a90c605e3bc4ca7ca0eb91c1dc873a79987ff8fd . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1 . . . . . . . . . . . . . . . . [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 (99 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.int-x3.letsencrypt.org' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://cert.int-x3.letsencrypt.org/' . . . . . . . . . . . . . . . . [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 (24 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'libguides.sim.edu.sg' . . . . . . . . . . . . . . . . [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 (69 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.23.140.1.2.1 (Domain Validation Certificates Policy) . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.44947.1.1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://cps.letsencrypt.org' . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.11129.2.4.2 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f0007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe000001678e078c6c000004030047304502206248ceb713ccd3dad45e9a2a2fa5a11b303d10362a502b641e135933a234184a022100b4b1cc7833904e747ab2a6e7d71d93b310af231c7d91596c4a3497a13161bab300760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d000001678e078cbd000004030047304502201aaf3d86a9e5e1bab50c10487018cf167676722ce03abc23ca93a9bed175ebdc022100c054b5f1a3a41c2bd5429f0f9b6c60dd4af718c21a40542f9f8edea7315b8111 . . . . [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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