add

GLEngine.add(x, y)

Returns a ciphertext that is the sum of the two inputs. Does not consume any level.

• Input:
  • x: 3D array of double or complex double, GLPlaintext, or GLCiphertext
  • y: 3D array of double or complex double, GLPlaintext, or GLCiphertext
  • At least one of the inputs must be a GLCiphertext.
• Output:
  • GLCiphertext

Examples

Addition of two ciphertexts

import numpy as np

from desilofhe import GLEngine

engine = GLEngine()
shape = engine.shape
secret_key = engine.create_secret_key()

message1 = np.ones(shape, dtype=np.float64)
ciphertext1 = engine.encrypt(message1, secret_key)

message2 = np.ones(shape, dtype=np.float64) * 2
ciphertext2 = engine.encrypt(message2, secret_key)

added = engine.add(ciphertext1, ciphertext2)

Addition of a ciphertext and a 3d matrix

import numpy as np

from desilofhe import GLEngine

engine = GLEngine()
shape = engine.shape
secret_key = engine.create_secret_key()

message1 = np.ones(shape, dtype=np.float64)
ciphertext1 = engine.encrypt(message1, secret_key)

message2 = np.ones(shape, dtype=np.float64) * 2
ciphertext2 = engine.encrypt(message2, secret_key)

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

Addition of a ciphertext and a plaintext

import numpy as np

from desilofhe import GLEngine

engine = GLEngine()
shape = engine.shape
secret_key = engine.create_secret_key()

message1 = np.ones(shape, dtype=np.float64)
plaintext1 = engine.encode(message1)
ciphertext1 = engine.encrypt(plaintext1, secret_key)

message2 = np.ones(shape, dtype=np.float64) * 2
plaintext2 = engine.encode(message2)
ciphertext2 = engine.encrypt(plaintext2, secret_key)

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