www.talkingbooksplus.com

Issued by PositiveSSL CA 2

About this certificate

This digital certificate with serial number 52:aa:e6:7d:5c:ba:3f:36:27:25:9a:f2:94:fc:11:38 was issued on by COMODO CA Limited.

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:

Certificate Subject

CN=www.talkingbooksplus.com,OU=Domain Control Validated+OU=Hosted by BlueHost.Com\, INC+OU=PositiveSSL

COMODO CA Limited

Organization: COMODO CA Limited
State / Province: Greater Manchester
Locality: Salford
Country: GB

This certificate has expire since

Certificate Details

Serial Number (hex): 52:aa:e6:7d:5c:ba:3f:36:27:25:9a:f2:94:fc:11:38
Serial Number (int): 109884061006740956056247569605174497592
Serial Number lenght: 127 bits, 16 octets

SubjectKeyId: 3f:78:b0:67:bd:4f:e0:00:ef:7f:ba:78:57:f1:2d:f0:a7:1b:49:69
AuthorityKeyId: 99:e4:40:5f:6b:14:5e:3e:05:d9:dd:d3:63:54:fc:62:b8:f7:00:ac

Fingerprint (sha1): 9f:91:c1:7d:60:cd:3a:c9:63:b3:f0:f4:e1:9b:79:9e:07:7e:7b:61
Fingerprint (sha256): 54:e6:78:8e:c2:01:f1:66:b8:f3:25:03:e1:75:cf:02:fb:14:f4:6a:ac:08:71:32:e2:2f:84:3a:ce:44:33:d0

Issuing Certificate URL: http://crt.comodoca.com/PositiveSSLCA2.crt

Revocation information

OCSP Server: http://ocsp.comodoca.com
CRL Distribution Point: http://crl.comodoca.com/PositiveSSLCA2.crl

Check the revocation status for certificate www.talkingbooksplus.com

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.talkingbooksplus.com

Public Key Algorithm

RSA

Key Size

2048

Signature Algorithm

SHA1 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.talkingbooksplus.com
talkingbooksplus.com

Other certificates including the domain name talkingbooksplus.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.talkingbooksplus.com in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0EV5m7vWJIlbPRb/GHvz
PnItIEYmP8SDll4A8c2O/2LFj83dbyHhNakPHAny5RShX4P6nsvMbCEd/sziPLS2
YAGES+ExoOnF3ikZFdweB7E6O3C7ZRahJ7jBTCEedP4s7FOoBEuTAtMdQJ9fFy3a
vTN0RjX+zMpx+pSQ/SnjlkehUx90+5qsT6lBtF27HciKG79aVR2igDH9bWVb8EVs
Yk/2dQ7O8xSk8Xd9QNtvrMrM98vIcJiJ/xlFae4Am/E2KVPOWRjL7n7Gub3yX8sK
sHlVuR262YcK28Nz9/X27hQ97vDk2TsX2tiM5Cca6coLcgExHwjHr2D2QjaE/JgH
9QIDAQAB
-----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 109884061006740956056247569605174497592
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.5 (sha1WithRSAEncryption)
 . . . . . . . . . . . . [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 'GB'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.8 (stateOrProvinceName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Greater Manchester'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.7 (localityName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Salford'
 . . . . . . . . . . . . [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 'COMODO CA Limited'
 . . . . . . . . . . . . [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 'PositiveSSL CA 2'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2012-04-13 00:00:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2013-04-13 23:59:59 +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 2.5.4.11 (organizationalUnitName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Domain Control Validated'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.11 (organizationalUnitName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Hosted by BlueHost.Com, INC'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.11 (organizationalUnitName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'PositiveSSL'
 . . . . . . . . . . . . [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.talkingbooksplus.com'
 . . . . . . . . [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 26291826848360556613337021494989066735940298906310818607591113598028070392345724683310706784874412153811687825316426112047130329075301384450833439295851968002041810039168548166690432316730356425676447385971961332277375381357193895423351064075776798320422959205758303380751786722909633961726810215220572711086884395884697410493348908347380472802777510422026478346436394723351034769663524243524185030775283156973197020878432104915699683969248620140887886973094047107472579462420501173564646353096324330163034902495980603217536837088070356815205272962337834798777861032994419408703523422986927307540658635508875252991989
 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.35 (authorityKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 99e4405f6b145e3e05d9ddd36354fc62b8f700ac
 . . . . . . . . . . . . . . . . [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)
							3f78b067bd4fe000ef7fba7857f12df0a71b4969
 . . . . . . . . . . . . . . . . [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 2.5.29.19 (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 2.5.29.37 (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 2.5.29.32 (certificatePolicies)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (63 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.6449.1.2.2.7
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://www.positivessl.com/CPS'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31 (cRLDistributionPoints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (52 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crl.comodoca.com/PositiveSSLCA2.crl'
 . . . . . . . . . . . . . . . . [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 (96 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2 (caIssuers)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crt.comodoca.com/PositiveSSLCA2.crt'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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.comodoca.com'
 . . . . . . . . . . . . . . . . [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 (50 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.talkingbooksplus.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'talkingbooksplus.com'
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.5 (sha1WithRSAEncryption)
 . . . . . . . . [c:0|t:5|false] NULL 
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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