asapex.stanford.edu

Issued by InCommon Server CA

About this certificate


This digital certificate with serial number 70:9c:07:b3:7f:10:4d:13:13:c0:96:85:32:d1:fc:8d was issued on by Internet2 .

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.

Stanford University

Organization: Stanford University
Organization unit: Administrative Systems
Address: 450 Serra Mall
Postal code: 94305
State / Province: CA
Locality: Stanford
Country: US

Internet2

Organization: Internet2
Organization unit: InCommon
Postal code: 94305
State / Province: CA
Locality: Stanford
Country: US

Time since certificate expired

This certificate has expire since

Certificate Details

Serial Number (hex): 70:9c:07:b3:7f:10:4d:13:13:c0:96:85:32:d1:fc:8d
Serial Number (int): 149683690035874629524841824192964983949
Serial Number lenght: 127 bits, 16 octets

SubjectKeyId: 1c:ec:bf:50:ee:ac:7a:2d:17:d0:48:e1:c2:b1:d4:24:47:74:7e:9f
AuthorityKeyId: 48:4f:5a:fa:2f:4a:9a:5e:e0:50:f3:6b:7b:55:a5:de:f5:be:34:5d

Fingerprint (sha1): b2:85:61:29:fb:4f:bf:36:b6:07:16:b4:16:1c:ff:74:14:bf:f9:97
Fingerprint (sha256): 14:d0:0d:aa:f0:96:87:d3:3d:03:b2:c8:c0:b4:05:0c:9d:c4:a1:06:e2:b7:d8:7c:35:c5:14:27:46:bc:1b:d2

Issuing Certificate URL: http://cert.incommon.org/InCommonServerCA.crt

Revocation information

OCSP Server: http://ocsp.incommon.org
CRL Distribution Point: http://crl.incommon.org/InCommonServerCA.crl

Check the revocation status for the current certificate on asapex.stanford.edu
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

Extensions

9 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: asapex.stanford.edu

Certificate

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

Certificate (PEM)

-----BEGIN CERTIFICATE----- MIIFQTCCBCmgAwIBAgIQcJwHs38QTRMTwJaFMtH8jTANBgkqhkiG9w0BAQUFADBR MQswCQYDVQQGEwJVUzESMBAGA1UEChMJSW50ZXJuZXQyMREwDwYDVQQLEwhJbkNv bW1vbjEbMBkGA1UEAxMSSW5Db21tb24gU2VydmVyIENBMB4XDTEyMDgxNDAwMDAw MFoXDTE1MDkyNjIzNTk1OVowgbMxCzAJBgNVBAYTAlVTMQ4wDAYDVQQREwU5NDMw NTELMAkGA1UECBMCQ0ExETAPBgNVBAcTCFN0YW5mb3JkMRcwFQYDVQQJEw40NTAg U2VycmEgTWFsbDEcMBoGA1UEChMTU3RhbmZvcmQgVW5pdmVyc2l0eTEfMB0GA1UE CxMWQWRtaW5pc3RyYXRpdmUgU3lzdGVtczEcMBoGA1UEAxMTYXNhcGV4LnN0YW5m b3JkLmVkdTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMUyYtXwx1GM GOiMEK0qmhSlVpG6CsPYBQA3PYVE4GC4zmzwmAzQnmkcE/blnmYpHDeGpPitclEI kEN2hhpqD7DMN/10nycx0HGkcW55MmqDv6jBDrbygEXRwyJEGy9BWiCE0xkjPfUS rNjMNqY1dwSwqGdCROpuuQpVbH/cpUI6EFghgP68DgvwofxICnSfqBbSWVLQsjPa Z068vF6gxWhZhlN1YunHepcWTtO4yPNBnc/DPvlrV1EZ9Bncf9Oa11qTslr5thad ew+XLXSlcGoyracbIILA7wIRrjN2htutQkcfP3yn6nvmXw7sYee+X9LMsOBlLZ7O 0BOxYF6VWX8CAwEAAaOCAbAwggGsMB8GA1UdIwQYMBaAFEhPWvovSppe4FDza3tV pd71vjRdMB0GA1UdDgQWBBQc7L9Q7qx6LRfQSOHCsdQkR3R+nzAOBgNVHQ8BAf8E BAMCBaAwDAYDVR0TAQH/BAIwADAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUH AwIwXQYDVR0gBFYwVDBSBgwrBgEEAa4jAQQDAQEwQjBABggrBgEFBQcCARY0aHR0 cHM6Ly93d3cuaW5jb21tb24ub3JnL2NlcnQvcmVwb3NpdG9yeS9jcHNfc3NsLnBk ZjA9BgNVHR8ENjA0MDKgMKAuhixodHRwOi8vY3JsLmluY29tbW9uLm9yZy9JbkNv bW1vblNlcnZlckNBLmNybDBvBggrBgEFBQcBAQRjMGEwOQYIKwYBBQUHMAKGLWh0 dHA6Ly9jZXJ0LmluY29tbW9uLm9yZy9JbkNvbW1vblNlcnZlckNBLmNydDAkBggr BgEFBQcwAYYYaHR0cDovL29jc3AuaW5jb21tb24ub3JnMB4GA1UdEQQXMBWCE2Fz YXBleC5zdGFuZm9yZC5lZHUwDQYJKoZIhvcNAQEFBQADggEBADN6ko5aQ3r5HAA1 9ivDQSU/1O97o5fX5b0Fs1r0YGPc22sHYeIO3jt9weMaCnnS+gd8TzYY1u8phnq0 QZdu8X9bxRrkbmFqwrIBPzvR2HOj0gnxDwCgWev6K0NaqZxTDJNUmACFVbbYCnYx 2UBinTfUV+mxY1D1BAMpXoPzhGKtlJdkTA7Ih5Ic1gj8RpXgn9ACF5NUfW99c2R2 grz+7ahJSFEPPrpfZqWnQm/Y8d01G3+TvuQ6cVQ47VgUOnLZGmbF7FFZWQhIUKVL VH1j+SZtqTNg5lMcrujCi8eteG48coT0P/YlS1HT17oX2mtBCxob1MQ/kjsH00e3 G3invk4= -----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxTJi1fDHUYwY6IwQrSqa FKVWkboKw9gFADc9hUTgYLjObPCYDNCeaRwT9uWeZikcN4ak+K1yUQiQQ3aGGmoP sMw3/XSfJzHQcaRxbnkyaoO/qMEOtvKARdHDIkQbL0FaIITTGSM99RKs2Mw2pjV3 BLCoZ0JE6m65ClVsf9ylQjoQWCGA/rwOC/Ch/EgKdJ+oFtJZUtCyM9pnTry8XqDF aFmGU3Vi6cd6lxZO07jI80Gdz8M++WtXURn0Gdx/05rXWpOyWvm2Fp17D5ctdKVw ajKtpxsggsDvAhGuM3aG261CRx8/fKfqe+ZfDuxh575f0syw4GUtns7QE7FgXpVZ fwIDAQAB -----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 149683690035874629524841824192964983949 . . . . . . . . [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 'Internet2' . . . . . . . . . . . . [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 'InCommon' . . . . . . . . . . . . [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 'InCommon Server CA' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2012-08-14 00:00:00 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2015-09-26 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 'US' . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.17 (postalCode) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString '94305' . . . . . . . . . . . . [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 'CA' . . . . . . . . . . . . [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 'Stanford' . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.9 (streetAddress) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString '450 Serra Mall' . . . . . . . . . . . . [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 'Stanford University' . . . . . . . . . . . . [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 'Administrative Systems' . . . . . . . . . . . . [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 'asapex.stanford.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 24893792378903531700368377825902915262014118405076091821645326456002732583211296142784819996190958483976920652738913060390308028175255606848343607621673583874946835149284231151310900023982369462431157081756341537476356407131669414019677125042387181259025231843922496739816495852649885357379699409217503097801023709192039969986648583284601538792741601650713206090735564231583687895809086402355510057275101787935167076406748816326438185279420648741727467985423624268240342368473103844425298345506091885549221754803081278813129980240897761361966321380615189049372891308734018828693720868014404615378728936176006773168511 . . . . . . . . . . . . . . . . . . . . [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 484f5afa2f4a9a5ee050f36b7b55a5def5be345d . . . . . . . . . . . . . . . . [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) 1cecbf50eeac7a2d17d048e1c2b1d42447747e9f . . . . . . . . . . . . . . . . [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 (86 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.5923.1.4.3.1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 'https://www.incommon.org/cert/repository/cps_ssl.pdf' . . . . . . . . . . . . . . . . [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 (54 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.incommon.org/InCommonServerCA.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 (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 1.3.6.1.5.5.7.48.2 (caIssuers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://cert.incommon.org/InCommonServerCA.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.incommon.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 (23 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'asapex.stanford.edu' . . . . [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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