Wikipedia
Crypto-paganism
A Crypto-pagan is a pagan who maintains the pretense of adherence to a non-pagan (i.e. Abrahamic) religion while continuing to observe their own religious practices in private. The term stems from the Greek word , meaning 'hidden' or 'secret'. This may be in response to a perceived danger of rejection by society, or of formalised persecution by an established religious orthodoxy.