RSA > Questions

Q1. Is the bit size the modulus or public key?
A1. 2048 bits Modulus (μ)
     112 bits Exponent (ε)
    2160 bits Public Key section of the Certificate
     * ε < μ always
     * Yes, the bit size is the modulus
     * Messages being encrypted using RSA public-key cryptography must be shorter than the modulus of the public key.