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Go and Crypto:
Homomorphic
Encryption with ElGamal
Prof Bill Buchanan OBE, Blockpass ID Lab
http://asecuritysite.com
Public Key:
• RSA: Factorization to prime numbers.
• Elliptic Curve: Uses elliptic curve methods.
• ElGamal: Discrete logarithms
ElGamal
ElGamal
ElGamal
(Key Gen)
Bob public:
Bob private:
ElGamal
(Encrypt)
ElGamal
(Decrypt)
ElGamal
Go and Crypto:
Homomorphic Multiplication
with ElGamal
Prof Bill Buchanan OBE, Blockpass ID Lab
http://asecuritysite.com
Multiplication
Multiplication
Go and Crypto:
Homomophic Division with
ElGamal
Prof Bill Buchanan OBE, Blockpass ID Lab
http://asecuritysite.com
Division
Division
Go and Crypto:
Homomorphic Addition
with ElGamal
Prof Bill Buchanan OBE, Blockpass ID Lab
http://asecuritysite.com
Additive
Additive
Go and Crypto:
Homomorphic
Encryption with ElGamal
Prof Bill Buchanan OBE, Blockpass ID Lab
http://asecuritysite.com

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Homomorphic Encryption with ElGamal in Go