“ECDSA

Elliptic Curve Cryptography (ECC) and ECDSA are a specific flavor of asymmetric cryptography. They are widely used in blockchain technology because of three reasons:

• Their computational performance is economical compared to a lot of other algorithms
• The keys that are generated are relatively short
• Bitcoin started it, so most new blockchain projects have copied it

ECDSA uses the algebraic structure of elliptic curves over finite fields. Without getting into the mathematics of it, they require a set of constants to define this curve. The constants used by most blockchains are set in the secp256k1 standard.”

https://hackernoon.com/a-closer-look-at-ethereum-signatures-5784c14abecc

https://en.wikipedia.org/wiki/Elliptic-curve_cryptography?ref=hackernoon.com

https://www.secg.org/sec2-v2.pdf

More Signatures

https://medium.com/immunefi/intro-to-cryptography-and-signatures-in-ethereum-2025b6a4a33d

https://medium.com/mycrypto/the-magic-of-digital-signatures-on-ethereum-98fe184dc9c7

https://ethereum.stackexchange.com/questions/64380/understanding-ethereum-signatures

https://ethereum.stackexchange.com/questions/64380/understanding-ethereum-signatures

Transaction Data

https://info.etherscan.com/understanding-transaction-input-data/

Signature Databases