How to deal with 'scale out of bounds' when do multiplication?

[scottsongc]

Question

How to deal with 'scale out of bounds' when do multiplication?

Further Information

I am employing the tenseal on sigmoid approximation on an encrypted tensor, but it told me that 'scale out of bounds'. I saw this question can be deal in SEAL with rescale, how can I do this operation in tenseal?

Screenshots

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System Information

• OS: [e.g. iOS]
• OS Version: [e.g. 22]
• Language Version: [e.g. Python 3.7, Node 10.18.1]
• Package Manager Version: [e.g. Conda 4.6.1, NPM 6.14.1]

Additional Context

Add any other context about the problem here.

[youben11]

Rescaling is done for you automatically in TenSEAL, however, you need to have chosen appropriate parameters to be able to perform the number of multiplication required by your circuit. Here, the polynomial is of degree 3, thus require a depth of 2. Your coefficient modulus degree must look something like: [A, x, x, B] in order to work.