tuc.com.sg
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:47:88:dd:a2:5b:56:90:f1:b6:f7:3d:51:f3:f3:b2:b6:a2 was issued on by Let's Encrypt.
With 3 subject alternative names this certificate can be used to secure multiple fqdn's. 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=tuc.com.sg
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:47:88:dd:a2:5b:56:90:f1:b6:f7:3d:51:f3:f3:b2:b6:a2Serial Number (int): 285678831644686765119388887496927900513954
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 81:43:63:ac:bc:81:80:35:49:a9:10:84:f5:c1:08:d4:8b:98:46:fc
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): aa:d4:ca:01:5f:57:02:06:c7:96:68:62:6e:3c:b7:88:75:36:e5:a7
Fingerprint (sha256): 46:03:a7:82:86:25:f6:7f:5f:5c:75:84:cc:bf:b2:80:21:a2:e8:bd:7c:df:eb:dd:48:3d:bb:14:6a:97:24:e2
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate tuc.com.sg
3
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for tuc.com.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
mail.tuc.com.sg
tuc.com.sg
www.tuc.com.sg
tuc.com.sg
www.tuc.com.sg
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Certificate
The complete raw certificate details for tuc.com.sg in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFbTCCBFWgAwIBAgISA0eI3aJbVpDxtvc9UfPzsraiMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTAzMTExODMwMTFaFw0x OTA2MDkxODMwMTFaMBUxEzARBgNVBAMTCnR1Yy5jb20uc2cwggEiMA0GCSqGSIb3 DQEBAQUAA4IBDwAwggEKAoIBAQCrgGQlCnqqzqSiV40NJuwL3KpA96KzK7kBWv4I qh+GBDmCw3sqcp6IRBwEhOeqjzvdyw6x/Val37BpKIvgdFnk12SmQRreUBFsQryk 1bZfICw3TGarVl+prVBtWdcT1jktaipcSQBoKo/n9KKITRSZx5wjNT3dxDu3E42s 9o6D1Z9u9DVjdDVM8MzG1x/+PcqEXYNP2F1hdQbJVapYe6R9A9BZBjm+vq2Qs5rH YqSB20MHp/+mlxpqfdMnGxGlW1rL5AaSvjNVzGbGLzwYvIaBom9g+zP0DgXOK1M0 JZIgLdEaq8gH64f+qsMl0AioOrVWfheKPU5HVCeSWdkg/kFTAgMBAAGjggKAMIIC fDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMC MAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFIFDY6y8gYA1SakQhPXBCNSLmEb8MB8G A1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUFBwEBBGMwYTAu BggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNyeXB0Lm9yZzAv BggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNyeXB0Lm9yZy8w NgYDVR0RBC8wLYIPbWFpbC50dWMuY29tLnNnggp0dWMuY29tLnNngg53d3cudHVj LmNvbS5zZzBMBgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLfEwEBATAoMCYG CCsGAQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCCAQQGCisGAQQB 1nkCBAIEgfUEgfIA8AB2AOJpS64m6OlACeiGG7Y7g9Q+5/50iPukjyiTAZ3d8dv+ AAABaW474WoAAAQDAEcwRQIgUk+24SGk6UjMILyjFz3pVP7ZxH4SLXRKzh0i6MI3 ccoCIQCq2XG9EHNPNROZsiOAvTrPnRMOxvJhnqQtXWGR9bbV0wB2AGPy283oO8ws zwtyhCdXazOkjWF3j711pjixx2hUS9iNAAABaW474WsAAAQDAEcwRQIhAPBZrikn H/eX+KPpEkmXAz9wyJSoj6Lw8h30QOa5ps6WAiABjJUt9kkXrc+7Od/5zwZ3cKhs 3OW6XZ/OBbLxJ2zEnTANBgkqhkiG9w0BAQsFAAOCAQEAVnXrkjS66YgQktbzk8Cp MV1HwkNzqBtPJ7SuoQ6xpA/BRYzI/8hkQoaYTb0Foyrp4DYgGTkXOIWsK7Jwxtyc d6F5F2sSfFn+TVQLo23/Oftc+JMyYTMtEYgZ1in5BLHvwDNATJUTjeEQlQirOEwy YzRdmtwS2BAx6C+MdyNpSMiuG0/wTyPkn9A+SVFpworsa8EtQ86fUbkfXcCxOCWJ z/t4dOOc5MnHt1kOp8PeIM8c9h3+bNM0pvN62YmbZrrDOIwma7LW25GuiULuEnkT OW3915t11RMyOnM9UelP6FBj/qm9CzeUHbbmT1CFLYGOV2xiZt50wgq7f6SOOfLq Hg== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAq4BkJQp6qs6koleNDSbs C9yqQPeisyu5AVr+CKofhgQ5gsN7KnKeiEQcBITnqo873csOsf1Wpd+waSiL4HRZ 5NdkpkEa3lARbEK8pNW2XyAsN0xmq1Zfqa1QbVnXE9Y5LWoqXEkAaCqP5/SiiE0U mcecIzU93cQ7txONrPaOg9WfbvQ1Y3Q1TPDMxtcf/j3KhF2DT9hdYXUGyVWqWHuk fQPQWQY5vr6tkLOax2KkgdtDB6f/ppcaan3TJxsRpVtay+QGkr4zVcxmxi88GLyG gaJvYPsz9A4FzitTNCWSIC3RGqvIB+uH/qrDJdAIqDq1Vn4Xij1OR1QnklnZIP5B UwIDAQAB -----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 285678831644686765119388887496927900513954 . . . . . . . . [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 2019-03-11 18:30:11 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-06-09 18:30:11 +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 'tuc.com.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 21650062204756172448379960532144373035540615864102361238009594643580574213111519010621538860898612347418263852194293427519383088069349475742914857843220122683948419095002979079061594896536915229893858712354202981208620492075530070881289932225441168606447250369397256839155634183382559024018559129381558786025452224238427019991757709680243212363652955541612785789545155141150389671851446089437504613173833599094592171945460033639093915142359332609398111833810961399784903887888987258565666763812412889351694010529355982923554218972950955049864577869369923882115768548503113896701406846809688739189165026075061570650451 . . . . . . . . . . . . . . . . . . . . [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) 814363acbc81803549a91084f5c108d48b9846fc . . . . . . . . . . . . . . . . [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 (47 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.tuc.com.sg' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'tuc.com.sg' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.tuc.com.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) 00f0007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe000001696e3be16a00000403004730450220524fb6e121a4e948cc20bca3173de954fed9c47e122d744ace1d22e8c23771ca022100aad971bd10734f351399b22380bd3acf9d130ec6f2619ea42d5d6191f5b6d5d300760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d000001696e3be16b0000040300473045022100f059ae29271ff797f8a3e9124997033f70c894a88fa2f0f21df440e6b9a6ce960220018c952df64917adcfbb39dff9cf067770a86cdce5ba5d9fce05b2f1276cc49d . . . . [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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