PKCS 8

{{Short description|Cryptography standard}}

{{Correct title|title=PKCS #8|reason=hash}}

In cryptography, PKCS #8 is a standard syntax for storing private key information. PKCS #8 is one of the family of standards called Public-Key Cryptography Standards (PKCS) created by RSA Laboratories. The latest version, 1.2, is available as RFC 5208.{{cite IETF

| title = Public-Key Cryptography Standards (PKCS) #8: Private-Key Information Syntax Specification Version 1.2

| rfc = 5208

| last1 = Kaliski

| first1 = B.

| date = May 2008

| publisher = IETF

}}

The PKCS #8 private key may be encrypted with a passphrase using one of the PKCS #5 standards defined in RFC 2898,{{cite IETF

| title = PKCS #5: Password-Based Cryptography Specification Version 2.0

| rfc = 2898

| last1 = Kaliski

| first1 = B.

| date = September 2000

| publisher = IETF

}} which supports multiple encryption schemes.

A new version 2 was proposed by S. Turner in 2010 as RFC 5958 {{IETF RFC|5958}} - Asymmetric Key Packages and might obsolete RFC 5208 someday in the future.

PKCS #8 private keys are typically exchanged in the PEM base64-encoded format, for example:

-----BEGIN PRIVATE KEY-----

MIIBVgIBADANBgkqhkiG9w0BAQEFAASCAUAwggE8AgEAAkEAq7BFUpkGp3+LQmlQ

Yx2eqzDV+xeG8kx/sQFV18S5JhzGeIJNA72wSeukEPojtqUyX2J0CciPBh7eqclQ

2zpAswIDAQABAkAgisq4+zRdrzkwH1ITV1vpytnkO/NiHcnePQiOW0VUybPyHoGM

/jf75C5xET7ZQpBe5kx5VHsPZj0CBb3b+wSRAiEA2mPWCBytosIU/ODRfq6EiV04

lt6waE7I2uSPqIC20LcCIQDJQYIHQII+3YaPqyhGgqMexuuuGx+lDKD6/Fu/JwPb

5QIhAKthiYcYKlL9h8bjDsQhZDUACPasjzdsDEdq8inDyLOFAiEAmCr/tZwA3qeA

ZoBzI10DGPIuoKXBd3nk/eBxPkaxlEECIQCNymjsoI7GldtujVnr1qT+3yedLfHK

srDVjIT3LsvTqw==

-----END PRIVATE KEY-----

-----BEGIN ENCRYPTED PRIVATE KEY-----

MIIBrzBJBgkqhkiG9w0BBQ0wPDAbBgkqhkiG9w0BBQwwDgQImQO8S8BJYNACAggA

MB0GCWCGSAFlAwQBKgQQ398SY1Y6moXTJCO0PSahKgSCAWDeobyqIkAb9XmxjMmi

hABtlIJBsybBymdIrtPjtRBTmz+ga40KFNfKgTrtHO/3qf0wSHpWmKlQotRh6Ufk

0VBh4QjbcNFQLzqJqblW4E3v853PK1G4OpQNpFLDLaPZLIyzxWOom9c9GXNm+ddG

LbdeQRsPoolIdL61lYB505K/SXJCpemb1RCHO/dzsp/kRyLMQNsWiaJABkSyskcr

eDJBZWOGQ/WJKl1CMHC8XgjqvmpXXas47G5sMSgFs+NUqVSkMSrsWMa+XkH/oT/x

P8ze1v0RDu0AIqaxdZhZ389h09BKFvCAFnLKK0tadIRkZHtNahVWnFUks5EP3C1k

2cQQtWBkaZnRrEkB3H0/ty++WB0owHe7Pd9GKSnTMIo8gmQzT2dfZP3+flUFHTBs

RZ9L8UWp2zt5hNDtc82hyNs70SETaSsaiygYNbBGlVAWVR9Mp8SMNYr1kdeGRgc3

7r5E

-----END ENCRYPTED PRIVATE KEY-----