It is a higher security technology that the data are encrypted by double-random phase encoding with uniformly distributed random phase.A new encrypted in-line Fresnel holographic mark is proposed based on the double-random phase encoding method, the holography and the digital printing technology. Theoretic and computer simulation prove that the encrypted in-line Fresnel holographic mark has the characteristics of availability and security. Computer simulations also indicate the encrypted in-line Fresnel holographic mark can be compressed with higher compressive ratio. Experimental results on the printing and scanning processes are presented to demonstrate that the proposed encrypted in-line Fresnel holographic mark can be printed on print matter by printer or digital printing machine as an identification mark.