www.security-service.amadeus.com

Issued by VeriSign Class 3 International Server CA - G3

About this certificate


This digital certificate with serial number 4a:3c:10:a7:57:6e:b2:b9:eb:6f:af:a6:08:32:ce:c2 was issued on by VeriSign, Inc. .

While the 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.

Cerificate errors/warnings *beta

  • WARNING: Using depricated TeletexString for '[Erding]'
  • WARNING: Using depricated TeletexString for '[Amadeus Data Processing]'
  • WARNING: Using depricated TeletexString for '[ADP-DN-NE-NEE]'
  • WARNING: Using depricated TeletexString for '[www.security-service.amadeus.com]'
  • ERROR: Certificate contains a key usage different from ServerAuth, ClientAuth or ServerGatedCrypto

Amadeus Data Processing

Organization: Amadeus Data Processing
Organization unit: ADP-DN-NE-NEE
State / Province: Bayern
Locality: Erding
Country: DE

VeriSign, Inc.

Organization: VeriSign, Inc.
Organization unit: VeriSign Trust Network
Organization unit: Terms of use at https://www.verisign.com/rpa (c)10
State / Province: Bayern
Locality: Erding
Country: DE

Time since certificate expired

This certificate has expire since

Certificate Details

Serial Number (hex): 4a:3c:10:a7:57:6e:b2:b9:eb:6f:af:a6:08:32:ce:c2
Serial Number (int): 98674747276311684266925919588712632002
Serial Number lenght: 127 bits, 16 octets

SubjectKeyId:
AuthorityKeyId: d7:9b:7c:d8:22:a0:15:f7:dd:ad:5f:ce:29:9b:58:c3:bc:46:00:b5

Fingerprint (sha1): 10:11:75:b2:2b:ad:18:cb:ca:57:3e:2d:aa:e5:e2:03:cb:c1:a2:6e
Fingerprint (sha256): 74:8e:76:0f:58:82:45:5e:6d:67:78:f6:bd:c1:56:1d:8e:33:1a:52:a7:71:7c:28:34:e1:89:0d:f4:70:24:d3

Issuing Certificate URL: http://SVRIntl-G3-aia.verisign.com/SVRIntlG3.cer

Revocation information

OCSP Server: http://ocsp.verisign.com
CRL Distribution Point: http://SVRIntl-G3-crl.verisign.com/SVRIntlG3.crl

Check the revocation status for the current certificate on www.security-service.amadeus.com
1
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details about this certificate


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
Netscape Server-Gated Cryptography

Extensions

8 extensions
No unhandled critical extensions



CA Certificate

This is not a CA certificate

Subject Alternative Names

This certificate doesn't contain any other subject alternative names besides the common name of the subject: www.security-service.amadeus.com

Certificate

The complete raw certificate details in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE----- MIIFcTCCBFmgAwIBAgIQSjwQp1dusrnrb6+mCDLOwjANBgkqhkiG9w0BAQUFADCB vDELMAkGA1UEBhMCVVMxFzAVBgNVBAoTDlZlcmlTaWduLCBJbmMuMR8wHQYDVQQL ExZWZXJpU2lnbiBUcnVzdCBOZXR3b3JrMTswOQYDVQQLEzJUZXJtcyBvZiB1c2Ug YXQgaHR0cHM6Ly93d3cudmVyaXNpZ24uY29tL3JwYSAoYykxMDE2MDQGA1UEAxMt VmVyaVNpZ24gQ2xhc3MgMyBJbnRlcm5hdGlvbmFsIFNlcnZlciBDQSAtIEczMB4X DTEzMTAzMDAwMDAwMFoXDTE0MTIwNzIzNTk1OVowgZQxCzAJBgNVBAYTAkRFMQ8w DQYDVQQIEwZCYXllcm4xDzANBgNVBAcUBkVyZGluZzEgMB4GA1UEChQXQW1hZGV1 cyBEYXRhIFByb2Nlc3NpbmcxFjAUBgNVBAsUDUFEUC1ETi1ORS1ORUUxKTAnBgNV BAMUIHd3dy5zZWN1cml0eS1zZXJ2aWNlLmFtYWRldXMuY29tMIIBIjANBgkqhkiG 9w0BAQEFAAOCAQ8AMIIBCgKCAQEAskS8J34bXkC6tM4nVdSY7+uPHm45A2ooPiSD 2xVQaw7tvHUML+qm/T8zV9PjgiBys7OMyK/Rf2SwkuQ5V437LvdwFtiVPIKX5QnR ZHEXhfnIbl2oYOCHq+Zeq5MJ9YPWU3q4nDODy73wKeMRIzh1W1Qk9hCdhe7E+Dg9 WujrXb027Ti+pVYhNi9fK8+BI8Iz1Obx5kL26bxLUFA/a45K5RziS+uPRhUPIUmW NSAeFJlLFcaHucYCtWabPRUVbmhkI53zMrVD/SgPlIyp4o35X6diIVOYAzzg46pd rk+C8QTKLbtvN2n6J7pioi/5WPKJey5xKXxEWr2NmVxsUrkPZQIDAQABo4IBkzCC AY8wKwYDVR0RBCQwIoIgd3d3LnNlY3VyaXR5LXNlcnZpY2UuYW1hZGV1cy5jb20w CQYDVR0TBAIwADAOBgNVHQ8BAf8EBAMCBaAwKAYDVR0lBCEwHwYIKwYBBQUHAwEG CCsGAQUFBwMCBglghkgBhvhCBAEwQwYDVR0gBDwwOjA4BgpghkgBhvhFAQc2MCow KAYIKwYBBQUHAgEWHGh0dHBzOi8vd3d3LnZlcmlzaWduLmNvbS9jcHMwHwYDVR0j BBgwFoAU15t82CKgFffdrV/OKZtYw7xGALUwQQYDVR0fBDowODA2oDSgMoYwaHR0 cDovL1NWUkludGwtRzMtY3JsLnZlcmlzaWduLmNvbS9TVlJJbnRsRzMuY3JsMHIG CCsGAQUFBwEBBGYwZDAkBggrBgEFBQcwAYYYaHR0cDovL29jc3AudmVyaXNpZ24u Y29tMDwGCCsGAQUFBzAChjBodHRwOi8vU1ZSSW50bC1HMy1haWEudmVyaXNpZ24u Y29tL1NWUkludGxHMy5jZXIwDQYJKoZIhvcNAQEFBQADggEBAEZVBdBHyqkSawCG 6JmevgA1eGeSPs9O2gJusLmcQCzbPEi16C9KEviqW730FKrSTB4S6z9GhFZoCtxE UcgAmvR3kes6jSx/NIPtfknmat1BRxnoGzBqpebostxC/1w7YcNxIWlbWXfhm70G Iostk00QxuhShl+JQgPGKYJVuhBn6eMEQ/rNF7Km5gyO7kD9GRjUPvslMOBhfD1T 2moUrrGyxVpzeE0+OZpdViOTdI2bb9aSYrW3HsqsmzdQiCdfQkau/tEm5xgV5Jak HZiBkLgCHkccX/ZKMx0ZALiLHM3T//InGBnlgzADJ54lbb/zAzB3SuJCU5FusoI3 LlkYoL0= -----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAskS8J34bXkC6tM4nVdSY 7+uPHm45A2ooPiSD2xVQaw7tvHUML+qm/T8zV9PjgiBys7OMyK/Rf2SwkuQ5V437 LvdwFtiVPIKX5QnRZHEXhfnIbl2oYOCHq+Zeq5MJ9YPWU3q4nDODy73wKeMRIzh1 W1Qk9hCdhe7E+Dg9WujrXb027Ti+pVYhNi9fK8+BI8Iz1Obx5kL26bxLUFA/a45K 5RziS+uPRhUPIUmWNSAeFJlLFcaHucYCtWabPRUVbmhkI53zMrVD/SgPlIyp4o35 X6diIVOYAzzg46pdrk+C8QTKLbtvN2n6J7pioi/5WPKJey5xKXxEWr2NmVxsUrkP ZQIDAQAB -----END PUBLIC KEY-----

ASN1 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 98674747276311684266925919588712632002 . . . . . . . . [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 '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 'VeriSign, 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 'VeriSign Trust Network' . . . . . . . . . . . . [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 'Terms of use at https://www.verisign.com/rpa (c)10' . . . . . . . . . . . . [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 'VeriSign Class 3 International Server CA - G3' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2013-10-30 00:00:00 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2014-12-07 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 2.5.4.6 (countryName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'DE' . . . . . . . . . . . . [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 'Bayern' . . . . . . . . . . . . [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:20|false] TeletexString, T61String 'Erding' . . . . . . . . . . . . [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:20|false] TeletexString, T61String 'Amadeus Data Processing' . . . . . . . . . . . . [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:20|false] TeletexString, T61String 'ADP-DN-NE-NEE' . . . . . . . . . . . . [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:20|false] TeletexString, T61String 'www.security-service.amadeus.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 22504312764682192248951840268242574692769347978290128268376362510522940818793885162480138681125769977740948579129020716618819368780049577411993013360565630604526606699062629310289261696013381145152781170554647795546118958014868502839577675774825294428503140497368638072775004664227995421062728726605777258583461694713217318897627608863535484538030977503895702233049453605683932520767882955146166677916393079522419807289962960402453838427828522879651505533718913825693450443819511286237911553979767695850321317275072086929611656329726208093916500908922856098766771684359471080986460928751477482860000253677799242010469 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.17 (subjectAltName) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (36 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.security-service.amadeus.com' . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19 (basicConstraints) . . . . . . . . . . . . . . . . . . . . [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 2.5.29.15 (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 (33 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:6|false] OBJECT IDENTIFIER 2.16.840.1.113730.4.1 (serverGatedCrypto) . . . . . . . . . . . . . . . . [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 (60 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.16.840.1.113733.1.7.54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 'https://www.verisign.com/cps' . . . . . . . . . . . . . . . . [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 d79b7cd822a015f7ddad5fce299b58c3bc4600b5 . . . . . . . . . . . . . . . . [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 (58 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://SVRIntl-G3-crl.verisign.com/SVRIntlG3.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 (102 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.verisign.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://SVRIntl-G3-aia.verisign.com/SVRIntlG3.cer' . . . . [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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