[Cryptography] OpenSSL: rsa_builtin_keygen: key size too small

Henry Baker hbaker1 at pipeline.com
Sun Dec 22 12:33:40 EST 2019

Perhaps someone here can help.

I'm developing a system that utilizes public key encryption, but it
is exceptionally computationally intensive (at least for the machine
that I'm developing it on).

I tried to downgrade the encryption just for the development phase,
but OpenSSL won't allow me to use keys smaller than 512 bits.

Does anyone know how to turn off this error message in order to
work with much smaller keys?

openssl genrsa -out key128.pem 128

"key size too small"

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