The document discusses the ElGamal public key encryption algorithm. It explains that ElGamal uses discrete logarithms to generate a public and private key during key generation. The public key is used to encrypt messages while the private key is used for decryption. The document was written by Prof. Bill Buchanan and provides a link to further information about ElGamal encryption on asecuritysite.com.

1. Go and Crypto:
ElGamal Public Key
Prof Bill Buchanan OBE, Blockpass ID Lab
http://asecuritysite.com

2. Public Key:
• RSA: Factorization to prime numbers.
• Elliptic Curve: Uses elliptic curve methods.
• ElGamal: Discrete logarithms

3. ElGamal

4. ElGamal
(Key Gen)
Bob public:
Bob private:

5. ElGamal
(Encrypt)

6. ElGamal
(Decrypt)

7. ElGamal

8. Go and Crypto:
ElGamal Public Key
Prof Bill Buchanan OBE, Blockpass ID Lab
http://asecuritysite.com