ecdsa library provides an easy-to-use implementation of ECDSA (Elliptic Curve Digital Signature Algorithm). With
ecdsa, we can easily generate public and private key pairs, sign digital messages, and verify the integrity of digital messages. The library can be installed using the following
pip install ecdsa
Digital Signature is an asymmetric cryptographic technique that is used to validate the authenticity of digital messages or documents. It uses the concept of public/private key pairs where the two keys are mathematically linked which provides security properties superior to handwritten signatures. The person who signs a digital document or message uses their private key, and the only way to decrypt the signature is to use the same person’s public key. If we successfully decrypt the digital message using the person’s public key, it is mathematically proven that the same person signed the message. Digital Signatures play an important role in cryptocurrency.
In the example below, we demonstrate how to create digital signatures.
from ecdsa import SigningKey private_key = SigningKey.generate() # uses NIST192p signature = private_key.sign(b"Educative authorizes this shot") print(signature)
In the above example, we first import the
SigningKey object from the
ecdsa library. The
generate() method of
SigningKey creates a private key for us. By default, the
generate() method uses NIST192p curve. If you want to use a longer curve that provides more security, you can add the parameter
curve=<curvename> in the
generate() method. We can then use the
sign() accessible to
private_key to sign any digital data as a byte string and get back a digital signature (also a byte string).
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