www.sass.hkusu.hku.hk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:ce:6e:b0:ed:cf:d9:5b:93:37:b6:1d:6f:19:3c:73:ec:05 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=www.sass.hkusu.hku.hk
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:ce:6e:b0:ed:cf:d9:5b:93:37:b6:1d:6f:19:3c:73:ec:05Serial Number (int): 331582159128176080949503899623992625196037
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 3e:8c:87:a6:f5:08:1a:ae:2a:65:1d:07:8c:2a:26:8f:bf:7c:6d:50
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 74:0f:3c:d6:62:cb:35:e8:63:3d:a1:9b:1e:af:44:46:0b:29:e9:8e
Fingerprint (sha256): 01:d2:b3:9d:73:38:2b:26:48:26:b3:50:5e:a7:82:2f:26:66:e3:79:6d:45:a7:9e:ca:84:ff:f9:dc:6f:85:2d
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate www.sass.hkusu.hku.hk
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for www.sass.hkusu.hku.hk
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
www.sass.hkusu.hku.hk
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Certificate
The complete raw certificate details for www.sass.hkusu.hku.hk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFYjCCBEqgAwIBAgISA85usO3P2VuTN7Ydbxk8c+wFMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA0MDUyMzA2MTJaFw0x OTA3MDQyMzA2MTJaMCAxHjAcBgNVBAMTFXd3dy5zYXNzLmhrdXN1LmhrdS5oazCC ASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAM2GFIdpABDokJWjpk89uF7l oAwOH/QdnGaSHGWJfzZ1GbvEHDWM6+Bdv9/WkNQ1Y9q3KYT2SXDBGgOq6zBrF+WO WOXcP9sCUuocTtK3p3rEIB2uL4jWnhQ5nBbv3p/qW2dK2b5umFU9gg7hPJc2PQV5 X3vNHjFPujaPtqgKWIrH/BXDWnz7p6YatYItymesX63d/MX5hAr73jPcE8xRZB2r 0CRMnH2yFMTRsO1Yml+hH3tQb/3jvwLr7CfM5gCZnAv5Z4wXerIc1qarHw/sJGsj JOnQLGH7N1nBw0EC0+fqoKCXpBosSgh84JR+bkU39ww9eACvA/GUTtF+nR9iUYkC AwEAAaOCAmowggJmMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcD AQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUPoyHpvUIGq4qZR0H jComj798bVAwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYIKwYB BQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2Vu Y3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2Vu Y3J5cHQub3JnLzAgBgNVHREEGTAXghV3d3cuc2Fzcy5oa3VzdS5oa3UuaGswTAYD VR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYa aHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEEBgorBgEEAdZ5AgQCBIH1BIHy APAAdQDiaUuuJujpQAnohhu2O4PUPuf+dIj7pI8okwGd3fHb/gAAAWnv949fAAAE AwBGMEQCIDfL6swT6k4s0wc/wL1nz/xuG557JCRm4mdi348Fogd+AiAfxOeB3BMa oS0O2i/0wxRI5Rigl2ofL2o21g3538GcHQB3ACk8UZZUyDlluqpQ/FgH1Ldvv1h6 KXLcpMMM9OVFR/R4AAABae/3jacAAAQDAEgwRgIhAP76R+AmzjLjxomQW4R5nYz3 xDFw6jIdNBJc0sogl9PCAiEA24AXv86d4PqqWgdk/4mtCSxgAmFcEVLSQE1ZcpoJ ORswDQYJKoZIhvcNAQELBQADggEBAA4U+v/1lbErGZYxgNspcI2JG6rNZGwfxsyA c+F1GJyRQf5oe/rcSRHc/dXWfkkqsmEuC4nMGUKJ2bN4O80khFwQSkTvnQgsO7PK Fb7M712zOIjqKkvNZSuU36pakXD7HTkFOR1dbmR6kWTheS7V/QzyDI2EAUFbVPI8 FAR6k9BGQJz+4ZoBqheGaI92VmZ8ERtJ1pVoZHjzasI7x2wNLgnIHvhRlRFxN4AG /SOGxWSVtvYtQfL1zpyZxDBOfOz8SM2KUKiWYW/R3jxm22+M1210PwSnwYBGQD33 GDJocGqq+ISE8YtzMbnaOpY/fNiz20QQZgoRUq9WxIYFXdVt5I8= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzYYUh2kAEOiQlaOmTz24 XuWgDA4f9B2cZpIcZYl/NnUZu8QcNYzr4F2/39aQ1DVj2rcphPZJcMEaA6rrMGsX 5Y5Y5dw/2wJS6hxO0renesQgHa4viNaeFDmcFu/en+pbZ0rZvm6YVT2CDuE8lzY9 BXlfe80eMU+6No+2qApYisf8FcNafPunphq1gi3KZ6xfrd38xfmECvveM9wTzFFk HavQJEycfbIUxNGw7ViaX6Efe1Bv/eO/AuvsJ8zmAJmcC/lnjBd6shzWpqsfD+wk ayMk6dAsYfs3WcHDQQLT5+qgoJekGixKCHzglH5uRTf3DD14AK8D8ZRO0X6dH2JR iQIDAQAB -----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 331582159128176080949503899623992625196037 . . . . . . . . [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 2019-04-05 23:06:12 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-07-04 23:06:12 +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 'www.sass.hkusu.hku.hk' . . . . . . . . [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 25944969924549772274123085716290467514395489596278332275632679078365371571148841783171711621978186312794199006994760820970091366528224444969487407968926430173718809559109144557464905268404375983392648585289937559449744849086104655016220148835733777341697528949794507361084364351849980510827096007925221355119991874353164008413213549928395613187927539144173660983054943160032813696702825542183512168236525028208230347577293302126120889302264618830565138229579511398257703399707590125652985532787894281383000800407495412854708586664806226276909955847064102392068494468475275044206187065334247312847507863804833918243209 . . . . . . . . . . . . . . . . . . . . [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) 3e8c87a6f5081aae2a651d078c2a268fbf7c6d50 . . . . . . . . . . . . . . . . [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 (25 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.sass.hkusu.hku.hk' . . . . . . . . . . . . . . . . [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) 00f0007500e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe00000169eff78f5f0000040300463044022037cbeacc13ea4e2cd3073fc0bd67cffc6e1b9e7b242466e26762df8f05a2077e02201fc4e781dc131aa12d0eda2ff4c31448e518a0976a1f2f6a36d60df9dfc19c1d007700293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000169eff78da70000040300483046022100fefa47e026ce32e3c689905b84799d8cf7c43170ea321d34125cd2ca2097d3c2022100db8017bfce9de0faaa5a0764ff89ad092c6002615c1152d2404d59729a09391b . . . . [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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