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| The %%SSH%% employs public key cryptography. A [[wp>Public-key_cryptography|public-key cryptography]], also known as asymmetric cryptography, is a class of cryptographic algorithms which requires two separate keys, one of which is secret (or private) and one of which is public.((&wikipedia_ref(Public-key_cryptography|Public-key cryptography))) Together they are known as a key pair. In %%SSH%%, the public key cryptography is used in both directions (client to server and server to client), so two key pairs are used. One key pair is known as a host (server) key, and the other is a user (client) key. | The %%SSH%% employs public key cryptography. A [[wp>Public-key_cryptography|public-key cryptography]], also known as asymmetric cryptography, is a class of cryptographic algorithms which requires two separate keys, one of which is secret (or private) and one of which is public.((&wikipedia_ref(Public-key_cryptography|Public-key cryptography))) Together they are known as a key pair. In %%SSH%%, the public key cryptography is used in both directions (client to server and server to client), so two key pairs are used. One key pair is known as a host (server) key, and the other is a user (client) key. | ||
| - | -----BEGIN RSA PRIVATE KEY----- | + | ===== User Private Key ===== |
| - | MIIEpAIBAAKCAQEAi+D6tOmB0uDx4n9ldVKrCvRHyOKSS0Su2D3hUfFfzCF9j7el | + | A //user private key// is a key kept secret by the %%SSH%% user on his/her client machine. The user must never reveal the private key to anyone, including the server (server administrator), not to compromise his/her identity. |
| - | cYV3tKeedy7CWny12JFUSgzCtgkTNDXWPLR5RK9iS1oWPiAfZn+epQ1hxG2VuuIS | + | |
| - | ejXvOjCrwz1EYn5djW/XSHuQ03pahUFedP7Bp9sh99zjrF5VQFAhVzXLuKaFEyEK | + | To protect the private key, it should be generated locally on a user's machine (e.g. using [[ui_puttygen|PuTTYgen]]) and stored encrypted by a passphrase. The passphrase should be long enough (that's why it's called passphrase, not password) to withstand a [[wp>Brute-force_attack|brute-force attack]] for a reasonably long time, in case an attacker obtains the private key file. |
| - | anx+cP+S+ltUo25HUUVIxW58hFsuOydsZwFs5Y4RoayUu1oCovB8uWtQkd59m2dV | + | |
| - | Vzwya2Tg99R28iabZ+XMXtG0ZNNTGCLzlIKbFsiz7ive8hWtwssKafFBb567JhWX | + | Different file formats are used to store private keys. WinSCP supports PuTTY format, with the ''.ppk'' extension. |
| - | AyFk1mzqE/acafPBr56hE+JLqBBAZQr3G4B87QIDAQABAoIBAEHHS751rLJhS/5q | + | |
| - | UGjqtjqRg4xpV8iDhQF1oBbrvlP9T9Gc1/VZgWB4DqIXYBgzW0R7mzqzY4E9JUXB | + | |
| - | J30mlXyCSWQL+je+3WVTEGSntVks+2OF2pCT+mrP5oYKsrTqnc3cUU3ppcJ9YEIX | + | |
| - | 6nZ0MtdfykqIGpy9Q7PZusQLLUEogmRR/Vcv5McvGsd2HTvXjLyeueGR/29KUwlw | + | |
| - | FDTw7tavDe77rXbhbi+83Cv8QLizG3i9xPgN9arbbyvY7hKURFpcPiItNmIVuQBI | + | |
| - | 80I1NZxwxhl89FbFABGNYwAuB9uB4nfvKl5Pm/CiCHOvgx0qwIa/1oLxpulfygNh | + | |
| - | 5bos2OECgYEA1QFttO2ddasOPSoePf1WBMU8F86cmFh1fwznDBTXYDNXGW7mZNYT | + | |
| - | OZYDmgt33Rmp51babM9WDckcncyu/hFnVvUFCcARoOXkyDq/qdppE5LjZev/G3+x | + | |
| - | EjZE/I26l8KKyNG01bmWvh7Sespx1LfQxoLREN/fEVoe34utWj1ZbiUCgYEAqBzl | + | |
| - | BLA4cCfz7VqLNthtEK5ptZnUM1KENDy4dXpEZlxCYKtwRMHO8AxksRlRbxemvh+5 | + | |
| - | tUGCf/dS8+NrGTT9T0Z5dKjXA6T5mQcFT7Kz92yVlQcGg19PXFs2TFiFYCATfWyt | + | |
| - | fRHfBvi+WgIS/5fn10lXYBXGfclqBQbi6mRwpSkCgYEAqfUN2EOQVAc8wUkOAGBX | + | |
| - | dk759/T/tf8/ITTmVhl7EGNmqAB5DRRTGqu8C/oClgSYMOJ4PkHhY/aIQtDDAC5a | + | |
| - | ymOOtYzvg/ZraeiWbay8EsYtc3Guh/6HBwUOXoWn0NeFbV8Gb1I6GVD2mMtXsGdK | + | |
| - | ylou/svibTH/WFdW5p308ZECgYEAoRzP/2ZDMHmZtGeJ884G+G2usXPzghwax1VK | + | |
| - | EoxS8SaKFss2lS6IfFXkSjXRbX5lNuCAwc0+nBUTUtko0seN3GPWEo+dQMjizF2G | + | |
| - | IZNKFl3iHSjWfSDilch0iUZszGrxQsrcmXh/HddV1j0WqA2VCyYmrtcvm21kRd0L | + | |
| - | q0cHDcECgYBJ3UvaBq4ZVWDxEn0tpjp7DrIhdEjA6O8SwQVprgPKQZo2S4oHJAPI | + | |
| - | j/I+Bq6c0VfZjCVVvNCjzbTrvYjldHCaE4T4nSeRq433JKxe/v45krinAt64NTQN | + | |
| - | JXK7q98+/SDOn4KFfINbj0emo0Fzw4BnMXeg7Tl/PshpeKJsrng8aQ== | + | |
| - | -----END RSA PRIVATE KEY----- | + | |
| ===== User Public Key ===== | ===== User Public Key ===== | ||