Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

chore(frontend-python): typo in fhe_basics.md #626

Merged
merged 1 commit into from
Dec 1, 2023
Merged

chore(frontend-python): typo in fhe_basics.md #626

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion docs/getting-started/fhe_basics.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,7 @@ A typical FHE program will be made up of a series of operations followed by a Bo

## Probability of Error

The amount of noise in a ciphertext is not as bounded as it may appear in the above illustration. As the errors are drawn randomly from a Gaussian distribution, they can be of varying size. This means that we need to be careful to ensure the noise terms do not effect the message bits. If the error terms do overflow into the message bits, this can cause an incorrect output (failure) when bootstrapping.
The amount of noise in a ciphertext is not as bounded as it may appear in the above illustration. As the errors are drawn randomly from a Gaussian distribution, they can be of varying size. This means that we need to be careful to ensure the noise terms do not affect the message bits. If the error terms do overflow into the message bits, this can cause an incorrect output (failure) when bootstrapping.

The default failure probability in Concrete is set for the whole program and is $$ \frac{1}{100000} $$ by default. This means that 1 execution of every 100,000 may result in an incorrect output. To have a lower probability of error, you need to change the cryptographic parameters, likely resulting in worse performance. On the other side of this trade-off, allowing a higher probability of error will likely speed-up operations.

Expand Down