def METHOD_NAME(encryptionMethod: EncryptionMethod, crypter: Union[RC4Crypter, RC4CrypterProxy]) -> 'SecurityLayer':
    """
    Create a security layer using the chosen encryption method and crypter.
    """
    if encryptionMethod in [EncryptionMethod.ENCRYPTION_40BIT, EncryptionMethod.ENCRYPTION_56BIT, EncryptionMethod.ENCRYPTION_128BIT]:
        parser = SignedSecurityParser(crypter)
        return SecurityLayer(parser)
    elif encryptionMethod == EncryptionMethod.ENCRYPTION_FIPS:
        parser = FIPSSecurityParser(crypter)
        return SecurityLayer(parser)