library.citytech.cuny.edu

Issued by R3

About this certificate

This digital certificate with serial number 04:59:11:2c:e5:cc:6d:ce:98:c9:c1:89:b0:13:82:3e:14:22 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=library.citytech.cuny.edu

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:59:11:2c:e5:cc:6d:ce:98:c9:c1:89:b0:13:82:3e:14:22
Serial Number (int): 378757104380862956952444224138846429647906
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: aa:f9:10:d6:fd:3f:ad:8c:0d:67:b8:38:81:32:30:0c:9f:ff:c6:62
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 7e:87:e1:6f:88:20:2e:0d:91:8e:b6:56:98:5a:48:de:3c:b1:bb:51
Fingerprint (sha256): 02:d5:10:36:5e:36:b4:22:30:33:fe:2c:db:92:46:cf:41:fb:f7:c7:b1:72:a1:2f:52:60:76:8a:67:86:99:69

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate library.citytech.cuny.edu

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for library.citytech.cuny.edu

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

library.citytech.cuny.edu

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Certificate

The complete raw certificate details for library.citytech.cuny.edu in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsVHt+kx1+lqRrJh46mu1
zBGNaus4lK+tjrhKPsOKsDMKaQZt8tja/DnNi97NkjN+dBwbfdPjycso9oCNOE8+
zVMGJjWxR6LbNwXy3CnqNah2JoBfwJfvCewrNjHWuF0L7rOKx6ZIB/47NK0OSlw5
Y5xO/cxBcPVBzK8SSXuyk6m2+u43p5XcIjvBgt3j5SNwrBXaXYv+ZsxIA3OZtFAk
0d5TIjC98i0gymZ8VJhYuF6BP+g5uo8pW5D0FJCVglyMIG71hiib6OUX5jGG+J3S
SYZ0QzkRIm1UCAuGLZSdYHnVfkY4dWPuTfZvVLzQkiOvMmLoHxhYmae8Md8D3TNI
cQIDAQAB
-----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 378757104380862956952444224138846429647906
 . . . . . . . . [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 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-07-31 18:01:41 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-10-29 18:01:40 +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 'library.citytech.cuny.edu'
 . . . . . . . . [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 22384580970766821813900986643347379715474008875362759055202152616030738517975495953806405631171683989356707479612650009117431153554913427887705937129629732228073726532202594008336148060116811895663533400478677510140637668683686238028874998271513200960726435192454397657712640811172422478202686620931362150441539405478568714144462326698011074771568175834712179584795569803705057967177926771376582272817552310392801787339041703929426883856299877329049705243341917433546004541349571544070773557866603500810589664150225511753687975140901254350891997963320794987470149398273928795115413453009284917851136224575037593831537
 . . . . . . . . . . . . . . . . . . . . [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)
							aaf910d6fd3fad8c0d67b8388132300c9fffc662
 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 (29 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'library.citytech.cuny.edu'
 . . . . . . . . . . . . . . . . [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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f00076007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb5200000189ad53dc3c0000040300473045022100b436b2e9fdc884ef7e4780afc5ee1eff861a6df4ec73e61ccfdda414a5dcba7a022057cba32153df6679a212fd50634999c37e71c0992861e71dcf327403d93e5161007600adf7befa7cff10c88b9d3d9c1e3e186ab467295dcfb10c24ca858634ebdc828a00000189ad53dc72000004030047304502202b4f58fadae31cc33f1e91965b87a195b7cd4890085fd0f6cebd523360d9bf40022100ef8362c5fe64842e6c90c5d1fa8212a5930f316832c3918283efaa6bce6e7127
 . . . . [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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