Title: What can I share in PGP
Post by: bitcoinermatt on December 09, 2020, 03:26:38 PM
I have trouble understanding PGP. I have Kleopatra installed and I have a certified keypair or something like that. I see people sharing PGP fingerprints, uploading them to servers, pgp blocks, I want to share this too. but what can I share? I have made a list below with the things that I have: - blablaPUBLIC.asc
- blablaSECRET.asc
- My fingerprint
What are the things I can share? And what is which one used for? Thanks!
Title: Re: What can I share in PGP
Post by: Charles-Tim on December 09, 2020, 03:30:11 PM
There is a post on this forum that explained more about PGP Signature, created by mdayonliner. Try to understand it and be able to start to know how you can encrypt a message.
[Eng: Tutorial] PGP Signature - Encrypt/Decrypt message - Fingerprint https://bitcointalk.org/index.php?topic=4059348.0
Title: Re: What can I share in PGP
Post by: BlackHatCoiner on December 09, 2020, 03:36:19 PM
I have trouble understanding PGP. PGP is complicated to understand. I can agree with you, it took me some days to understand it. Let's leave kleopatra out for a moment, since it's just a software that performs the PGP algorithms. I see people sharing PGP fingerprints, uploading them to servers, pgp blocks, I want to share this too. but what can I share? You can share with us your public key with a digital signature. That giant blablaPUBLIC.asc along with a text that proves mathematically that you own the public key without having to reveal your secret key. Same thing that happens in bitcoin too but with different encryption. (I think that kleopatra uses AES encryption) What are the things I can share? And what is which one used for? You can share everything except your secret key. If someone has it, he can prove that he is you. Fingerprint is nothing but the public key written on a smaller format so it can be easier to transfer. Note that you can't go from fingerprint to public key, but only the opposite. To cut a long story short, a fingerprint is a hashed public key (with SHA-1 or SHA-2). Consider taking a look on Booknemonic (https://bitcointalk.org/index.php?topic=5298089). I recently announced it and the purpose of it is getting rid of the enormous public keys.
Title: Re: What can I share in PGP
Post by: PawGo on December 09, 2020, 05:42:48 PM
I have trouble understanding PGP. I have Kleopatra installed and I have a certified keypair or something like that. I see people sharing PGP fingerprints, uploading them to servers, pgp blocks, I want to share this too. but what can I share? I have made a list below with the things that I have: - blablaPUBLIC.asc
- blablaSECRET.asc
- My fingerprint
What are the things I can share? And what is which one used for? Thanks! Public key. Only. you may also publish fingerprint, but it is useless without access to public key. So, in few words: You have two parts, public and private. Public is.... public. In fact you should upload it to any PGP server for other users to be able to find it. Private is yours. If someone gets your private key, you should revoke it. 4 operations are possible: - you sign message to someone -> you use your private key to sign something (text, file)... Private key will generate signature. Other side must have your public key (you may give it or person may find your key somewhere, on the PGP server, using your email or name or fingerprint etc.). If public key corresponds to the private key used by you - signature will be approved. - you may encrypt message to someone -> you need someone's public key. They you encrypt message and other person may decrypt it ONLY if have private key corresponding to public key you used. So, in fact even you cannot decrypt message you encrypted... but usually programs make is possible because they also prepare it using your's public key (it is possible to have more than one recipient). - you may verify signature - if you receive signed content, you may verify the authenticity using someone's public key. This part is interesting, because it is the way how you may verify if program (executable) or some other content is not modified. For example - author of Electrum wallet signs application and tells which key you should find/get to verify if the file comes really from him. - you may decrypt content prepared for you - if someone encrypted text/file using your public key, you need private key to decrypt it. As you see, operations are symmetrical and it is easy to understand if you think about it a little and remember that public part is available for everyone and private should be kept on your side. Regards,
Title: Re: What can I share in PGP
Post by: AB de Royse777 on December 09, 2020, 05:43:59 PM
- blablaPUBLIC.asc
- blablaSECRET.asc
- My fingerprint
What are the things I can share? And what is which one used for? You only share public key and fingerprint, never share secret key aka private key. Without public-key/fingerprint (uploaded in a server) no one can verify a message or file if you want them to have the original message or file that you have for them. For any recognize open-source software the dev team always provides the signature. Verifying the file against this signature means that you have the authentic piece of software. This helps you to avoid fake, phishing copies. Let me give you an example: Electrum wallet. You can have copies of Electrum client anywhere on the web including their official website (https://electrum.org/#download). How would you know that the copies that were downloaded from other websites are authentic, even the copies in their official site (the server may get hacked)? You only way to verify if the copy is genuine is the signature they provide. https://i.imgur.com/nFSCM1K.pngAnd these signatures are signed by ThomasV and his PGP public key is: https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc -----BEGIN PGP PUBLIC KEY BLOCK-----
mQINBE34z9wBEACT31iv9i8Jx/6MhywWmytSGWojS7aJwGiH/wlHQcjeleGnW8HF Z8R73ICgvpcWM2mfx0R/YIzRIbbT+E2PJ+iTw0BTGU7irRKrdLXReH130K3bDg05 +DaYFf0qY/t/e4WDXRVnr8L28hRQ4/9SnvgNcUBzd0IDOUiicZvhkIm6TikL+xSr 5Gcn/PaJFS1VpbWklXaLfvci9l4fINL3vMyLiV/75b1laSP5LPEvbfd7W9T6HeCX 63epTHmGBmB4ycGqkwOgq6NxxaLHxRWlfylRXRWpI/9B66x8vOUd70jjjyqG+mhQ +1+qfydeSW3R6Dr2vzDyDrBXbdVMTL2VFXqNG03FYcv191H7zJgPlJGyaO4IZxj+ +O8LaoJuFqAr8/+NX4K4UfWPvcrJ2i+eUkbkDJHo4GQK712/DtSLAA+YGeIF9HAn zKvaMkZDMwY8z3gBSE/jMV2IcONvpUUOFPQgTmCvlJZAFTPeLTDv+HX8GfhmjAJY T5rTcvyPEkoq9fWhQiFp5HRpYrD36yLVrpznh2Mx7B1Iy8Rq/7avadwVn87C6scJ ouPu+0PF3IeVmYfCScbfxtx1FaEczm8wGBlaB/jkDEhx0RR8PYKKTIEM7T2LH2p6 s/+Ei4V7mqkcveF/DPnScMPBprJwuoGNFdx2qKmgCKLycWlSnwec+hdyTwARAQAB tBlUaG9tYXNWIDx0aG9tYXN2MUBnbXguZGU+iQI4BBMBAgAiBQJN+M/cAhsDBgsJ CAcDAgYVCAIJCgsEFgIDAQIeAQIXgAAKCRAr1YJLf5Rw5hlhD/9T4I/sBCleS9nH njTJqcOnG28c9C3CRYIizjEui/pKmXz9fB1N9QrCaruPUQx2UacDVCl6dKxac+7s s3/a6lsjaRn0/2OM/sCVLScyxNPNPQs2b6jkodSNPIM8zv51g+flhwtfrO6h6B4j IhZgSjFdvqtZd5jaly9rA0uMX045CC4K6HGnq8n4F2p31z0L0LaHBf5EcsCM0MMp QVkY0aUrNg9uVMGXBHn3osHnOtQaODqcIbpa/OG+Tlt6pVOiDJ7i8TkpQKT7sOaM VdL//TEoDIOC7qVCN82q2q/gtiBXbziaERVs/eU0O52aX5qUhXu3VIjXTp/riRim R/f9BPB1dgDZbF2aPZ/rJm26v82ft7gP1Sf52E9MrAaZATTfI0/TUHXeBzN93EA9 xb6/ENAMTX74u+NjlynWPD+hl64eBzJ2ionZF1bJFTgBkMfRYnhllvleCjcq9YfX md5HKCwtxfygBIujUQSwyUzn0f5DbVCJ7/B19bKdvHGSSBgBEjxqXWQskm2wc0In ww63goZAGDQliKhIT8xnwOBbLkqSobq4tD9zpQyxvMA2rhy7/gfFRp7TTak7MZHf lTJ37S5LvcWHm/ccWUZDUN7akoEDc+m6jX3uIEPMD3PQvcHhWv0amco3zDr1qb/+ rXM7TJKd7DPX0E2dRzKu6aYRMTbklbQhVGhvbWFzIFZvZWd0bGluIDx0aG9tYXN2 MUBnbXguZGU+iQI4BBMBAgAiBQJTQDaRAhsDBgsJCAcDAgYVCAIJCgsEFgIDAQIe AQIXgAAKCRAr1YJLf5Rw5hOBD/9o/NqHLvjhrCfy6/SblSC/udV9ujFnvhZZZprb r8Oe6GdMwfw+ktZd2nYb09KjxXYmGoZeZKmvCb0LoMKSVWgisH1rgzDzI6UzFL4b pV2+PqCSiWaekfnBm+oHbGgJCuAXebGXjVL8JsvhAl0HQZzTA1RX0u8TEAHOxOI5 l+mXSN+cwVZuDMpt5v+JDyPGHM/KqaXCw1WJY50mqlan6/15XHilmvY/CaxmbXNH ZOXucmPxyCTeiQTqyhHsIBb4RxWYCaUXv9+svriotv2HZpQ110NN09ml1K1kDlNL Zh3jNqMsbImFArbN8GikjqhRBV3K77Np4lccnsBPllQMqqQULG7UshcQTatkmTMb j2TQ0oQWEZt0uJmnmxgz18ijs6m2fJZhlH0QYVYOwUvK6GfAFluHwOZHIXonv8Ck uTW+P90lOB/9ZnREZeYb2wlvV6fCTMHxptIbT31kbLTzu4KEI6+ShQXT+YAKiC5S JC9heheaeApH3wcLiZJcCKYv6ubY+3Uf/EoXcqWywwpS/nWkSpMSYjq+V9xCcGHI MZ4vZkiZ6OS5Mu739rgGfP7Yi3pqUYLIpUa5QiNOMEhPtWbj/oH5ldaZowwgZ4MK 2Mzxex8IhFppPtZgqJfu9NZQLICpxcd2hUe3XWvB+jcvboZ1p7RO7ax3Vo9zy1fy YEFML7Q9VGhvbWFzIFZvZWd0bGluIChodHRwczovL2VsZWN0cnVtLm9yZykgPHRo b21hc3ZAZWxlY3RydW0ub3JnPokCOAQTAQIAIgUCVMYFygIbAwYLCQgHAwIGFQgC CQoLBBYCAwECHgECF4AACgkQK9WCS3+UcOZ7BQ//VJuRmM7kQd5DcJS76BKpMtKt gUNV3hi2h8kNGtkIeKhpeiK+PeweFJCb0nQDiEYsg5Xd/l5ZwN34cqlhgaQ8uWBY rmNnSYGECLrxejx6WTWHp2AtD9BXrj73HEox2abC0Bdky39aCTyuRhSzbFnV2unh L7IarKqr5bat6ywFZWsOcaisEjWXlTSD/hYqnkRX8vnBZRnRgHyi1yOvHsXGFB3x O+P7JUb4E7BVzVRDJzMgcBhY5vTZ4Mnc8eIplNVI1TaF2hmhmnezvRF6XNYV1Ew9 t2/HE85+DqIBikUWYPTTxJiWUOwxXP9dVOEmNTcAgVThvMN7W+WoF7//qcNKmbPI DyGU5xb/MLNrM+MWfavtkHNqcY0+cFf27z4mOxd2eEMDVxN/Fhq0HipugMEawaZ0 G9xsF/rZBzKgpu7+SvqRqxUn36vNz59vDlBYEXSng6nJobUdNb6iHo/rpZ6ZYHKx mzrK5ROpmKs6zpPTOn8Hw29jxx07auzEIVEa8hzZaiqTfwI9yBwzhFQwNxmNaKRE adxosvU1VyTvaEVmMmTx227MF1qhwq9yrSXtmKZJGiHRzyL4B4vAGrf9uK9GwzS2 TlyksRdjapw6Cqp8sUB2PUzHqYNWs0wSsZuxwVt6JSD4N8vpYTTF00LONKe2oLhj GNxpH+BV3SqMHXQl9Ki5Ag0ETfjP3AEQAL5LYJiX5S4PG891TMihejh5KVgc36/R zgWYJkE26K855t+WdAa6spHKR1RmpTTsnaTXaC/bNxJZq+0vi9GKlw94twEueu0v Cniinpy6AFeydveCi+qdr5XQ4hx1DY11kntGBL2wMOtrZ4oAeFnntHYcAMYaMBY5 p8gd3WVR2dgIvpOcezQBLwhoMHnN6A+JEQ27ZHcolwDO9ic+t4YAtl552DP1xKbc T4D1JD0J6W6FbUJElOXReSjNGCuSLZZTsCzMg0P6RHwWUKtDvRKrK/M3Nh/L2EsW 5mAQnYps6a+hyVkVd9kLsogtHPE4xv33pzbDB5Yj+2zqdjYUqO/ODfkP+HjNRvyj uHL6W3bjU6FnuJQXX4llskls4hlKDPawa3cuWnsdafouAZOxWwBlGysRZ7BaHOFE TOlAeUN1EYfFrckcfkYzTX7NDA0S99aX730z/c9XrnqM52OO9LrSFRnYZ+K3M8z2 FFvo9/ZtqqTDH0/oH+ay0CwtowSovZUoljAQ8zmmi8CtPDFHg4srae8YxW4fetn7 QtP6rOVRwQCyP12LztC7oYGOectU5G9GkVDubNW48Vuex0/upP9RORjKN8atBroS cmomR5hShxmgdJBy4I/TDkVFbZq/hRPSTAHgnciEC67TYhszzXP3nTn5/Ah0wCGC d3HfiNX6G7MdABEBAAGJAh8EGAECAAkFAk34z9wCGwwACgkQK9WCS3+UcOaJRA// dLHRBjeAkNbRsY5GNTWUZzXr3VC5vNqpwpP9rK4QTAmpl3iU5F+wsgMG78iS2XOV +ijZA8KvishletQJoNMxS1PU4sA4Y34hYb61ptHs+PmwNpcdgjAX+mCh9xQ0816G yIaXtxtxacJJW3K07fqKIkJjISPOyTLSd+wl1LtRE2fA67pMmpMHG8t+RPq1dp/e 3qp6L7jc6X3U+bn2m7u2cgEVbuAnSaKGoMSMnsd71Ltf1b6/DwvZz/HBttEgcgSm PleHUVyBD4LDrcjTDK7zdEMw7b/cPBnu6CmTcogFEqvB4n9Yodo+4ij7AndUTz4J j1p8vFlnHvhRg82MDfGUPJ+ujBjbYXROs+WAmaCQ8TgjZ3dAFNFrOqAbYu6QlY2x fu7vj+ruc6ArdmBrOlsJFmNsxFRJfgdUug5JFIUN77GbjisHjWem8cY3szuyEke8 H2pi803CAuVtkaoNmNDHsEBieft34Zo0V+A/q2wkix3S9vyRjOKqhGrW30qxnV6Z FexueWuO3qOQ0ZU5/TIH0kft2n45/RexeBq/Ip52zE1vEvTkQmBCfCGZmqTu+9Ro 8qsjecxVNxyVPlwhlimryiQ+dPaJYaOSfiwEEMh2MyV5c6t6qN9n6jFdiCLOlmmH ZFA8xDodsofQEmlv+I/xyEZ7na6nxbpZVuPC3B0JFtY= =sUYl -----END PGP PUBLIC KEY BLOCK----- This key is recognized by the community. So when you download the copy of Electrum from anywhere in the world, your first job is to verify the file you just downloaded against this PGP public key of ThomasV. For that you need: 1. Import the public key of ThomasV and certify it with your private key. 2. Download the signature of the version of the downloaded Electrum software. 3. Verify the downloaded software. If it verifies then you have the original copy and you can now install it without any hesitation. I hope I made it easy to understand the use case of PGP encryption. ~snip~
I normally send 5 merits for a good post but you deserve 2x than my normal from me. @bitcoinermatt, so far the best you got from PawGo. I only explain one use case of PGP.
Title: Re: What can I share in PGP
Post by: bitcoinermatt on December 09, 2020, 05:49:18 PM
- blablaPUBLIC.asc
- blablaSECRET.asc
- My fingerprint
What are the things I can share? And what is which one used for? You only share public key and fingerprint, never share secret key aka private key. Without public-key/fingerprint (uploaded in a server) no one can verify a message of file if you want them to have the original message or file that you have for them. For any recognize open-source software the dev team always provides the signature. Verifying the file against this signature means that you have the authentic piece of software. This helps you to avoid fake, phishing copies. Let me give you an example: Electrum wallet. You can have copies of Electrum client anywhere on the web including their official website (https://electrum.org/#download). How would you know that the copies that were downloaded from other websites are authentic, even the copies in their official site (the server may get hacked)? You only way to verify if the copy is genuine is the signature they provide. https://i.imgur.com/nFSCM1K.pngAnd these signatures are signed by ThomasV and his PGP public key is: https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc -----BEGIN PGP PUBLIC KEY BLOCK-----
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So when you download the copy of Electrum from anywhere in the world, your first job is to verify the file you just downloaded against this PGP public key of ThomasV. For that you need: 1. Import the public key of ThomasV and certify it with your private key. 2. Download the signature of the version of the downloaded Electrum software. 3. Verify the downloaded software. If it verifies then you have the original copy and you can now install it without any hesitation. I hope I made it easy to understand the use case of PGP encryption. ~snip~
I normally send 5 merits for a good post but you deserve 2x than my normal from me. @bitcoinermatt, so far the best you got from PawGo. I only explain one use case of PGP. Thanks a lot for the information! I think I understand now! I'm closing the topic.
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