SecureBytes 0.3.5

Clears the contents of bytes or integers containing cryptographic material

[](https://travis-ci.com/VidaID/pysecbytes)

## Install:

pip install SecureBytes

## Use:

Currently supports clearing integers, strings and bytes

from SecureBytes import clearmem, safemem

x = b’data that must be removed’

copy_of_x = x

clearmem(x)

assert(b’data’ not in copy_of_x)

In python3 only, temporarily overriding mem allocator to zero ram and prevent paging:

with safemem():

x = b’data that must be removed’ del x

# x is not in ram

Currently, safemem and scanmem aren’t supported on all pythons and platforms, use import safemem_supported, scanmem_supported to check.

## Warnings:

• Do not try to derive from str or bytes… extra copies of your data will be made

• Clearing strings and bytes also clears all references to them

• If you choose store sensitive material in a class, and put clearmem in __del__, it will only be cleared when the last reference is freed

• “safemem” is not yet efficient (TODO), and it only prevents swapping on Windows (TODO)