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basic_knowledge/cryptography/asymmetric_crypto.md

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+## 🍈 asymmetric crypto
+
+<br>
+
+* a private key in etherem is 64 random hex characters (or 32 bytes or 256 bits)
+* the public key is derived from the private key using elliptic curve digital signature algorith (ECDSA)
+* the ethereum address are the first 20 bytes of the SHA3 hashed public key
+* the private key creates a signature, the public key verifies the signature
+* when you transfer ether from one address to another, the tx is signed by your private key