Sensitive information is not protected

[stef]

The secret key of the issuer, the private attributes of the prover are not protected in RAM from being swapped to disk and they are not sanitized after they are not needed anymore, and thus they can linger for an attacker with a appropriate info leak vulnerability to extract this information. It is recommended to use memguard https://spacetime.dev/memory-security-go - to store all sensitive information and to limit any kind of exposure to info leaks.