tuc.com.sg
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:6e:a3:9e:69:af:cd:56:04:05:43:b7:74:63:50:0d:c9:36 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): 03:6e:a3:9e:69:af:cd:56:04:05:43:b7:74:63:50:0d:c9:36Serial Number (int): 298985404846382045947933629033405685287222
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: d8:8a:bb:c7:fe:d4:94:23:f8:12:d8:30:aa:6e:7b:a1:67:5e:36:55
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): b6:8d:84:62:eb:2a:0d:64:c4:ed:2a:e5:27:c5:91:d5:bf:6f:87:59
Fingerprint (sha256): 62:2b:a8:1c:46:4b:96:10:aa:77:b1:ea:db:8e:e9:3d:80:c6:ef:83:80:c2:fe:f3:97:c5:9b:82:81:1d:0d:9f
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----- MIIFazCCBFOgAwIBAgISA26jnmmvzVYEBUO3dGNQDck2MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAxMTExNTI4NTdaFw0y MDA0MTAxNTI4NTdaMBUxEzARBgNVBAMTCnR1Yy5jb20uc2cwggEiMA0GCSqGSIb3 DQEBAQUAA4IBDwAwggEKAoIBAQC9cpsE05OT/KWkjTh6lbvEJPov8BsAigi9Y/0Z v1zKfBg2xr3+LgA7X70/8TNNWsLVh+U522NWsKkDVYznYQXznyASC6nT9/JUBjvO ye1KdzvjBdyZZSvNkzNyTq2JlfvpgFPSb/677XLVQcnXaRolGLtQH+XJm42BK2GW GVJ6gTZ4R0HNuPPqtgaS4ChcQVvOCnxza+mRG08Nsy1PcoG6hExXQHe6t80wzKwu gM4BfulcQ3GF8HDzNOTRuxZxMJaPF744TY0Y0mUUxgnZ880WWvgG53ch8XilgT3j hPdV0gIzhqo8THK+Q7AyFC5RsqoKx0b+5bw02M/T9kvrREGvAgMBAAGjggJ+MIIC ejAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMC MAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFNiKu8f+1JQj+BLYMKpue6FnXjZVMB8G A1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUFBwEBBGMwYTAu BggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNyeXB0Lm9yZzAv BggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNyeXB0Lm9yZy8w NgYDVR0RBC8wLYIPbWFpbC50dWMuY29tLnNnggp0dWMuY29tLnNngg53d3cudHVj LmNvbS5zZzBMBgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLfEwEBATAoMCYG CCsGAQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCCAQIGCisGAQQB 1nkCBAIEgfMEgfAA7gB1AF6nc/nfVsDntTZIfdBJ4DJ6kZoMhKESEoQYdZaBcUVY AAABb5Vv6nwAAAQDAEYwRAIgAMH0vktRIb6VgSlaknbAn2ub/QOFniCxQ/QjY+XS ujACIAVDaINxAn8L5UviRTv+zQuYkISbdlAeLiex+njyKKk3AHUAB7dcG+V9aP/x sMYdIxXHuuZXfFeUt2ruvGE6GmnTohwAAAFvlW/qngAABAMARjBEAiB/WkkbBypx DHdMNNXK3HlB3JYgD0DMw3eSizs2xoiJBwIgZhSoBud0IUGDVJQzLNexiG3VdjZx ca3DqCNExq58T64wDQYJKoZIhvcNAQELBQADggEBACwIyeKYExagggITm4Zm+Cvy DsKm+sBqEHGqTRmnStQWyx1D16h+dz2EEfayCHufRZX34kNOb/W59pVoMaVPmJgM /WfLH2UaDvgY+s1+XmYQ/xjmCEA+pf2SAenluL5YLF4LF/iLQQULOTdTvRt1ylJT f9dxBmseXvW9dOOapr5kv+j5J5rEGy82EGPwY36JvFVV3FNJyBzvgquyYkoCGxoq IW34gsiroWy7v+YYFuoVJaIgtmCiKh3R2aQvgTUdA8hAZQBQ62yuKc5HDGNlAC/Q dYXnVpNMl9TPGPPs3cRxKP+T9d6PIEwny4jJbDjhdQa5gmhYj4PWCt69mzJW/aw= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvXKbBNOTk/ylpI04epW7 xCT6L/AbAIoIvWP9Gb9cynwYNsa9/i4AO1+9P/EzTVrC1YflOdtjVrCpA1WM52EF 858gEgup0/fyVAY7zsntSnc74wXcmWUrzZMzck6tiZX76YBT0m/+u+1y1UHJ12ka JRi7UB/lyZuNgSthlhlSeoE2eEdBzbjz6rYGkuAoXEFbzgp8c2vpkRtPDbMtT3KB uoRMV0B3urfNMMysLoDOAX7pXENxhfBw8zTk0bsWcTCWjxe+OE2NGNJlFMYJ2fPN Flr4Bud3IfF4pYE944T3VdICM4aqPExyvkOwMhQuUbKqCsdG/uW8NNjP0/ZL60RB 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 298985404846382045947933629033405685287222 . . . . . . . . [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 2020-01-11 15:28:57 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-04-10 15:28:57 +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 23915553737849919660787494201501434981992624796771303599548167102200128847234644185109236993572518109502291009584232922768336394292990581556382121825350646975326058258150144076866940478120825114658983607744557496883097614884637991148849673179572540670278149927836053368294729890828394593638962571477755069408990743111013819899034266712340318588025779943121894719673962846777487780477834713052746067124314214449531638599328731010280889560475423494209707342779642161810850966771802051745921832965496335671338862631557439792546067211400951069568204337081679354768854716382851480776565411028048235504900614335190616261039 . . . . . . . . . . . . . . . . . . . . [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) d88abbc7fed49423f812d830aa6e7ba1675e3655 . . . . . . . . . . . . . . . . [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 (243 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes) 00ee0075005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016f956fea7c0000040300463044022000c1f4be4b5121be9581295a9276c09f6b9bfd03859e20b143f42363e5d2ba3002200543688371027f0be54be2453bfecd0b9890849b76501e2e27b1fa78f228a93700750007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016f956fea9e000004030046304402207f5a491b072a710c774c34d5cadc7941dc96200f40ccc377928b3b36c688890702206614a806e7742141835494332cd7b1886dd576367171adc3a82344c6ae7c4fae . . . . [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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