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20 sats \ 5 replies \ @IamSINGLE OP 2 Feb \ parent \ on: What are some of the real world use cases of cryptography? crypto
Thanks. Maybe I'm short on words, I just know that Bitcoin uses cryptography for security. I've omitted that part.
Public key cryptography can be split into 3 categories:
- Encryption/Decryption
- Key exchange
- Digital signatures
The cryptography that Bitcoin uses are digital signatures. These are used to proof that you actually have the private key to a transaction output.
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Thanks. It seems cryptography isn't that difficult to learn. I was worried for nothing.
Is there a difference when we say "Cryptography" and "Public Key Cryptography"?
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It seems cryptography isn't that difficult to learn.
Well... it's a lot of math ;)
Is there a difference when we say "Cryptography" and "Public Key Cryptography"?
"cryptography" is an umbrella term for "symmetric" and "asymmetric" cryptography.
Symmetric cryptography is used for encryption/decryption and there is only one key. (The key for encrypting a message is also the key for decrypting it)
Asymmetric cryptography (public key cryptography) uses a pair of keys. (private key and public key)
When encrypting a message with the public key, only the one who has the private key can decrypt the message. This is useful for secure communication.
When signing a message with the private key, everyone can prove with the public key, that the message must have been signed by the owner of the private key.
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Well... it's a lot of math.
Lol, If I ever paid attention in maths class ;)
I based my response on your definition and his #873605
I feel grateful to you putting the basics of cryptography in so simple language. I'm starting to feel like an advanced Bitcoiner.
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cryptography is as simple as putting numbers,letters, made up symbols on a piece of paper, or a sign, and then making a rubric for what those symbols mean ( the secret or secrets). those who have the rubric, are thus the 'keyholders' that can decipher the meaning behind the characters.
2 kids making a secret language to pass notes at school only they can read is cryptography
an inside joke between two friends at a party that only they get is cryotography
sharing secrets without publicizing the meaning behind the message
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