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Master key should have Certify-capability only!
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Wael M. Nasreddine
parent
035d98ebbe
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7115f9a385
68
README.md
68
README.md
@ -206,17 +206,53 @@ $ gpg --gen-random -a 0 24
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ydOmByxmDe63u7gqx2XI9eDgpvJwibNH
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```
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Generate a new key with GPG, selecting `(4) RSA (sign only)` and `4096` bit keysize. Do not set the key to expire - see [Note #3](#notes).
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Generate a new key with GPG, selecting `(8) RSA (set your own capabilities)`, `Certify`-only and `4096` bit keysize. Do not set the key to expire - see [Note #3](#notes).
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```console
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$ gpg --full-generate-key
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$ gpg --expert --full-generate-key
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Please select what kind of key you want:
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(1) RSA and RSA (default)
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(2) DSA and Elgamal
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(3) DSA (sign only)
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(4) RSA (sign only)
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Your selection? 4
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(7) DSA (set your own capabilities)
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(8) RSA (set your own capabilities)
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(9) ECC and ECC
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(10) ECC (sign only)
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(11) ECC (set your own capabilities)
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(13) Existing key
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Your selection? 8
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Possible actions for a RSA key: Sign Certify Encrypt Authenticate
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Current allowed actions: Sign Certify Encrypt
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(S) Toggle the sign capability
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(E) Toggle the encrypt capability
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(A) Toggle the authenticate capability
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(Q) Finished
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Your selection? e
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Possible actions for a RSA key: Sign Certify Encrypt Authenticate
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Current allowed actions: Sign Certify
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(S) Toggle the sign capability
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(E) Toggle the encrypt capability
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(A) Toggle the authenticate capability
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(Q) Finished
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Your selection? s
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Possible actions for a RSA key: Sign Certify Encrypt Authenticate
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Current allowed actions: Certify
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(S) Toggle the sign capability
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(E) Toggle the encrypt capability
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(A) Toggle the authenticate capability
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(Q) Finished
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Your selection? q
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RSA keys may be between 1024 and 4096 bits long.
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What keysize do you want? (2048) 4096
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Requested keysize is 4096 bits
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@ -252,7 +288,7 @@ public and secret key created and signed.
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Note that this key cannot be used for encryption. You may want to use
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the command "--edit-key" to generate a subkey for this purpose.
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pub rsa4096/0xFF3E7D88647EBCDB 2017-10-09 [SC]
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pub rsa4096/0xFF3E7D88647EBCDB 2017-10-09 [C]
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Key fingerprint = 011C E16B D45B 27A5 5BA8 776D FF3E 7D88 647E BCDB
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uid Dr Duh <doc@duh.to>
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```
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@ -275,7 +311,7 @@ $ gpg --expert --edit-key $KEYID
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Secret key is available.
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sec rsa4096/0xEA5DE91459B80592
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created: 2017-10-09 expires: never usage: SC
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created: 2017-10-09 expires: never usage: C
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trust: ultimate validity: ultimate
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[ultimate] (1). Dr Duh <doc@duh.to>
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```
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@ -323,7 +359,7 @@ disks) during the prime generation; this gives the random number
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generator a better chance to gain enough entropy.
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sec rsa4096/0xFF3E7D88647EBCDB
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created: 2017-10-09 expires: never usage: SC
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created: 2017-10-09 expires: never usage: C
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trust: ultimate validity: ultimate
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ssb rsa4096/0xBECFA3C1AE191D15
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created: 2017-10-09 expires: 2018-10-09 usage: S
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@ -367,7 +403,7 @@ disks) during the prime generation; this gives the random number
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generator a better chance to gain enough entropy.
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sec rsa4096/0xFF3E7D88647EBCDB
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created: 2017-10-09 expires: never usage: SC
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created: 2017-10-09 expires: never usage: C
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trust: ultimate validity: ultimate
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ssb rsa4096/0xBECFA3C1AE191D15
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created: 2017-10-09 expires: 2018-10-09 usage: S
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@ -455,7 +491,7 @@ disks) during the prime generation; this gives the random number
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generator a better chance to gain enough entropy.
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sec rsa4096/0xFF3E7D88647EBCDB
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created: 2017-10-09 expires: never usage: SC
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created: 2017-10-09 expires: never usage: C
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trust: ultimate validity: ultimate
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ssb rsa4096/0xBECFA3C1AE191D15
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created: 2017-10-09 expires: 2018-10-09 usage: S
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@ -476,7 +512,7 @@ List the generated secret keys and verify the output:
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$ gpg --list-secret-keys
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/tmp.FLZC0xcM/pubring.kbx
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-------------------------------------------------------------------------
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sec rsa4096/0xFF3E7D88647EBCDB 2017-10-09 [SC]
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sec rsa4096/0xFF3E7D88647EBCDB 2017-10-09 [C]
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Key fingerprint = 011C E16B D45B 27A5 5BA8 776D FF3E 7D88 647E BCDB
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uid Dr Duh <doc@duh.to>
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ssb rsa4096/0xBECFA3C1AE191D15 2017-10-09 [S] [expires: 2018-10-09]
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@ -782,7 +818,7 @@ $ gpg --edit-key $KEYID
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Secret key is available.
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sec rsa4096/0xFF3E7D88647EBCDB
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created: 2017-10-09 expires: never usage: SC
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created: 2017-10-09 expires: never usage: C
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trust: ultimate validity: ultimate
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ssb rsa4096/0xBECFA3C1AE191D15
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created: 2017-10-09 expires: 2018-10-09 usage: S
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@ -801,7 +837,7 @@ Select and move the signature key. You will be prompted for the key passphrase a
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gpg> key 1
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sec rsa4096/0xFF3E7D88647EBCDB
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created: 2017-10-09 expires: never usage: SC
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created: 2017-10-09 expires: never usage: C
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trust: ultimate validity: ultimate
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ssb* rsa4096/0xBECFA3C1AE191D15
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created: 2017-10-09 expires: 2018-10-09 usage: S
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@ -832,7 +868,7 @@ gpg> key 1
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gpg> key 2
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sec rsa4096/0xFF3E7D88647EBCDB
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created: 2017-10-09 expires: never usage: SC
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created: 2017-10-09 expires: never usage: C
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trust: ultimate validity: ultimate
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ssb rsa4096/0xBECFA3C1AE191D15
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created: 2017-10-09 expires: 2018-10-09 usage: S
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@ -860,7 +896,7 @@ gpg> key 2
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gpg> key 3
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sec rsa4096/0xFF3E7D88647EBCDB
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created: 2017-10-09 expires: never usage: SC
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created: 2017-10-09 expires: never usage: C
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trust: ultimate validity: ultimate
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ssb rsa4096/0xBECFA3C1AE191D15
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created: 2017-10-09 expires: 2018-10-09 usage: S
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@ -886,7 +922,7 @@ Verify the subkeys have moved to YubiKey as indicated by `ssb>`:
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$ gpg --list-secret-keys
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/tmp.FLZC0xcM/pubring.kbx
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-------------------------------------------------------------------------
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sec rsa4096/0xFF3E7D88647EBCDB 2017-10-09 [SC]
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sec rsa4096/0xFF3E7D88647EBCDB 2017-10-09 [C]
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Key fingerprint = 011C E16B D45B 27A5 5BA8 776D FF3E 7D88 647E BCDB
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uid Dr Duh <doc@duh.to>
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ssb> rsa4096/0xBECFA3C1AE191D15 2017-10-09 [S] [expires: 2018-10-09]
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@ -1008,7 +1044,7 @@ $ gpg --edit-key $KEYID
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Secret key is available.
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gpg> trust
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pub 4096R/0xFF3E7D88647EBCDB created: 2016-05-24 expires: never usage: SC
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pub 4096R/0xFF3E7D88647EBCDB created: 2016-05-24 expires: never usage: C
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trust: unknown validity: unknown
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sub 4096R/0xBECFA3C1AE191D15 created: 2017-10-09 expires: 2018-10-09 usage: S
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sub 4096R/0x5912A795E90DD2CF created: 2017-10-09 expires: 2018-10-09 usage: E
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@ -1028,7 +1064,7 @@ Please decide how far you trust this user to correctly verify other users' keys
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Your decision? 5
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Do you really want to set this key to ultimate trust? (y/N) y
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pub 4096R/0xFF3E7D88647EBCDB created: 2016-05-24 expires: never usage: SC
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pub 4096R/0xFF3E7D88647EBCDB created: 2016-05-24 expires: never usage: C
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trust: ultimate validity: unknown
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sub 4096R/0xBECFA3C1AE191D15 created: 2017-10-09 expires: 2018-10-09 usage: S
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sub 4096R/0x5912A795E90DD2CF created: 2017-10-09 expires: 2018-10-09 usage: E
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