How can I save the result of an encrypted data in a database?

[jtovartr]

How can I save the result of an encrypted data in a database?

I have the following code that encrypts a vector containing the number 70.

context = ts.context(ts.SCHEME_TYPE.BFV, poly_modulus_degree=4096, plain_modulus=1032193)
plain_vector = [70]
encrypted_vector = ts.bfv_vector(context, plain_vector)
print(encrypted_vector.serialize())

When I call the serialize() method to display the encrypted vector I get the following output. (I had to copy only a part of the output because the returned value is very large)

... xee\x131\xb7\x89\x1b\x7f\x11\x90Q&\xe7\x94\x8a\x94\xd1\x80\xc36\x85\x80\xbf[\xa0\xea\x9ba\x05(\x8d\x8aZ\xed\x8a*\x1b\x8b\xe8\x96\xf0\xa2\xa8\xdf\xedP\x9c\xbf\x1f\x93\x19\xe0d\x10\xc9q_\xdb{b\xae\x89H!N\xdbRY\xac\xed\xcb$\x12C\x97\x93T\xed\xb4UhZ7P\xd3\xe25\xfc\xa5\xa6@\xbd\xd6i\xef\xca\x98~\xbd\xb1z\x8a\xd1d\x85\xbc4\x1c\x1c\xd0:=\x97!$\x07\xc1Q\xd4\xc5W\xf4\x94,\x05#A\\\xbc\xbb\xfb\t\x88\x01\xd7\xec\xb5)\xa7;\tT_(v\x7f~\xbe\x8c\xc8a\x1a\x00pc\xa0\xda\xab\x96b\xef|\xbd\xa8y7\x9e\xd3@\xcd\\\xa6\xcf=FFb\xf3D%T\xce\x0b\xc9}9\xff\xbe\xa9\x90\x90\xc9T\x1a_lS\xdd,U\xbb\xc4\xb1\x82.\xa1\xfb\r\x80R\x86\xbfc\x1f\xd5t\xff\x9c\x10\xb0\xd3\x7f;\x1co\x04\x17\x8e\xb3\x02\xa4\x9eAm\x02\xfd8g$\x1a\x08w\xf1\x06\nyK\x945\xa1{6\xd6\x98\xa4c\x00\x8c\x94\xe4\xbd\xeb\xad\x19\xe6\x8e\x9c\xcfX\xa1\x01\xf1\x08\xd3\x96E\x1aO\x19\xd4\xcdU\x96R\x1c\xcb0p\xa3\xd2\xab\xecN\x1b\xcbf~\xf3\x8b\xd0V\xeb+,\x02&",\xa2\xb9\x90\xb8yn\xb3]\xd71bJ\xab\x17\x8dq:A\xc5N\xb5\xe4\xee\xa5@+\x9b\x88\x0cbs$)\x00\xc2\x03E\xe6S\x88\x82\xf1\\\x96\xdfr\xb3\x15\x12\x03\xc1\xff\xbe\x15p\xd6.*k9\xda\xe1\x19\x1a\x1f\x0f\x96\r\xd1\x91\x01\x8d\x04%\x1eQ\xf3\xd8\x88\xfe\xdc1\x07x\x1b\x97X\x0f\xc6\xb8X\xb8\xda1G\x9d l\xa8\x8a\x9c\x17\xc7\x87\xc3\xfcM{\xc8o\x97TT\x8a\x8fe<P"\xb4\x9a\xbc\xc78\xf9\x19,\xeeT\x98\xc4{\x16\xf0\x16\x18\x91\xeb\xd2\x0e\x9e\xe9\x8a|\xd6\x1d#\xfa\x0f\xa10{l\xe0\x9a\xff\xa5n\x1d\xcc\x91\x0eE`T\x08\x18v\xf3\x02\xd4\xa8\xc7\xd3\xdc\x05\xe09\xff ...

You can see that it is a very large value and my goal is to store these values in a database, how can I do this?

[Emmet Friel]

For simplicity and speed you can a redis database (glorified Python dictionary). Serialize your encrypted vector to bytes and create a key with the corresponding value. See below:

# Serialize 
enc_vec = [ts.ckks_vector(secret_ctx, i.tolist()).serialize() for i in data]

# Connect to db
r = redis.Redis(localhost, 6379, 1)

# Upload list to db
r.rpush(myencryptedVector, *enc_vec)

[jtovartr]

@efriel94 Thanks for your answer. I understand your point but I still have the same doubt, the value of enc_vec will be very large and if I store it in a database like MySQL I don't think it will be scalable in the future

[Emmet Friel]

@jtovartr your question was merely asking how to store data onto a database there was no mention of scalability or computational resources. You have three options: 1) write to disk, 2) store in-memory, 3) offload to cloud or third party storage. Hard drives are cheap meaning that you can always expand your SQL db. In-memory is ok for small workloads using Redis db and cloud allows you to scale up or down on demand.

[jtovartr]

Thank you very much for your answer, it is clear to me, thanks again.