add

Engine.add(x, y)

Returns a ciphertext that is the sum of the two inputs.

• Input:
  • x: int, double, complex double, array_like, Plaintext, or Ciphertext
  • y: int, double, complex double, array_like, Plaintext, or Ciphertext
  • If one of the inputs is a scalar, its value is added to every element of the other input.
  • At least one of the inputs must be a Ciphertext.
• Input:
  • Ciphertext

Examples

Addition of two ciphertexts

from desilofhe import Engine

engine = Engine()
secret_key = engine.create_secret_key()  
public_key = engine.create_public_key(secret_key)

message1 = [1, 2, 3]
ciphertext1 = engine.encrypt(message1, public_key)

message2 = [4, 5, 6]
ciphertext2 = engine.encrypt(message2, public_key)

added = engine.add(ciphertext1, ciphertext2)

Addition of a ciphertext and a list

from desilofhe import Engine

engine = Engine()
secret_key = engine.create_secret_key()
public_key = engine.create_public_key(secret_key)

message1 = [1, 2, 3]
ciphertext1 = engine.encrypt(message1, public_key)

message2 = [4, 5, 6]
ciphertext2 = engine.encrypt(message2, public_key)

added1 = engine.add(ciphertext1, message2)
added2 = engine.add(message1, ciphertext2)

Addition of a ciphertext and a scalar

from desilofhe import Engine

engine = Engine()
secret_key = engine.create_secret_key()
public_key = engine.create_public_key(secret_key)

message1 = [1, 2, 3]
ciphertext1 = engine.encrypt(message1, public_key)

message2 = [4, 5, 6]
ciphertext2 = engine.encrypt(message2, public_key)

added1 = engine.add(ciphertext1, 2)
added2 = engine.add(2, ciphertext2)

Addition of a ciphertext and a plaintext

from desilofhe import Engine

engine = Engine()
secret_key = engine.create_secret_key()
public_key = engine.create_public_key(secret_key)

message1 = [1, 2, 3]
plaintext1 = engine.encode(message1)
ciphertext1 = engine.encrypt(plaintext1, public_key)

message2 = [4, 5, 6]
plaintext2 = engine.encode(message2)
ciphertext2 = engine.encrypt(plaintext2, public_key)

added1 = engine.add(ciphertext1, plaintext2)
added2 = engine.add(plaintext1, ciphertext2)