sis-schwerin.de

Issued by R3

About this certificate

This digital certificate with serial number 04:e8:14:f4:16:57:1e:d0:76:a4:42:d0:2a:b6:3f:fe:3d:ce was issued on by Let's Encrypt.

With 2 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=sis-schwerin.de

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:e8:14:f4:16:57:1e:d0:76:a4:42:d0:2a:b6:3f:fe:3d:ce
Serial Number (int): 427422504786163288911610136810689151253966
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: a7:57:b6:f1:85:33:41:59:49:bf:90:8c:78:3e:68:71:6e:b7:23:ef
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 57:f4:bb:4e:2d:5a:ba:fb:b8:e3:7b:59:f9:7e:b2:e0:ad:ec:3f:3a
Fingerprint (sha256): 20:10:f2:d1:9c:e2:bc:f3:86:e2:3c:21:09:c6:09:0a:96:3e:f6:62:d8:16:e9:e3:e2:6e:39:e4:3a:67:5b:d6

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

Revocation information

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

Check the revocation status for certificate sis-schwerin.de

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for sis-schwerin.de

Public Key Algorithm

RSA

Key Size

4096

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

sis-schwerin.de
www.sis-schwerin.de

Other certificates including the domain name sis-schwerin.de

(limited to 100 certificates)

Certificate

The complete raw certificate details for sis-schwerin.de in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA5BBd8JXonxbGxEQps8wK
vwNPxAKPc9Pl2NoCYVus+yaJsFfNK+s2DAyJ8Yi55el3hZasHjZJdhbJvhnxBMsY
RlMOH7Oeqq4E2XzMwIAay6/FJHKei6dHKKtUviEMRp6b+xtPMOJa/5NQZXGlv6Dp
afxAz6Y/tHSNTlNMsK9l5TSwmDeGZN0+MVWjhNWm9jxdQrT16afBfwS/mYaxUwJn
swaTCNWwB3gTg784W3LHosQtNgKUuO6jn7K8jyUzcSh6nNo1Rj4TMKJRHvWcmiZF
licM0Jvbb7O0cOW/RVaAwRmQt74y779XwKNtLy/L6rymjNwlt30NtMwv3pEzCcvR
aZw8hYFH1Yc5/ZeymTph8OH6KzUo3lGTgJfGjA9b6V4EJsmjAGmeVHLc1k/RzV/N
/TJMBQCwLPJ4y8u9ByqPumtVCF6Ne/xqFs19cYdB7+y4ou3Ub94vlKsE6j6XA0DF
2BLMqVkNk8oX09ejArhRbKs+ZbWt/VpxfcFoJT0Ts8gsWt9Fc8Mez8nu+F0cjzqZ
taOdbHDVhlWnAmqTHeQnIsnUm9QbgW6uJ0A/DIZm+Qf5TpJh57oHj70rELjIZ1mK
ycZZs9pevy7UOhCidkOySPMNLr4RZhjfv7dc2CPobVwcx4BGe2Hhl4VMp1Xz20W9
90t22/UnHQk5xZ5CXPAyAP8CAwEAAQ==
-----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 427422504786163288911610136810689151253966
 . . . . . . . . [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 2023-03-27 09:17:24 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-06-25 09:17:23 +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 'sis-schwerin.de'
 . . . . . . . . [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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 930419673054840316307771146779443943637710871423763095735983735609696514780075565611426424532555083150310909570411806470905885240615832698170034797783999719192068663219632510272231187350247187057912658112541632425303623342437707524989763647565813875283185953243389729723413236861941592034424020076491428560735972224198954264774131872640594727266129754471777194307596227848626731500551095421187329448077419182502143228596582378056093977650746816317774545858972291285296344575146305568618462329315571725096499870601451413696328671994325553803645669465259523639386476675109198785559676238987481378161318968844252077068123687481053555115544244653991977810884649584136851526109061396005237091778678118292379878400371955785474252219670069027399126844616247426823442468249721512184772051446214551062633223707280080591746767535439399995810119519819011039512253299601026298476648169277674446017788399923497631579433920694274069698442396081952470042206042817255594941280816244233559289385975172810988425434858346901751450125100859975054769341042864173868751360718471068684405818438755941705454555972402774503560040114201519995856272307647312163823282730732521058947086944983160684568716374342092898051051609255315472517038910908316916139557119
 . . . . . . . . . . . . . . . . . . . . [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)
							a757b6f18533415949bf908c783e68716eb723ef
 . . . . . . . . . . . . . . . . [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 (40 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'sis-schwerin.de'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.sis-schwerin.de'
 . . . . . . . . . . . . . . . . [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)
							00f00076007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb5200000187229297a500000403004730450221008df740e775496e17b35cc180e326b0411722d485971a5c4194a4089763ce9fcc0220021b39fcbb6e615a26ac9d74d9cd9cc5608e982b349e7d948c3fa4242973879a007600b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb499000001872292979e000004030047304502206d5b7967f59f5a98e557a7ecc9d7ddec23c9017492c5bf95d8ec9010c08ebd9d022100fd5f7cdbffa36078e580d6e5d98e33d86904726fdaef06db9defd10be1cb995b
 . . . . [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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