A blind signature algorithm for the message M uses a blinding factor, f; a modulus m; the private key, s, of the signer and the public key, q, of the signer. The sender, who generates f and knows q, presents the message to the signer in the form: Mf q (mod m) Thus, the message is not in a form readable by the signer since the signer does not know f. The signer signs Mf q (mod m) with his/her private key, returning (Mf q)s (mod m) This factor can be reduced to fMs (mod m) since s and q are inverses of each other. The sender then divides fMs (mod m) by the blinding factor, f, to obtain Ms (mod m) Ms (mod m) is, therefore, the message, M, signed with the private key, s, of the signer.
Answer Zero knowledge proof refers to a zero knowledge proof. In general, a zero knowledge proof involves a person, A, trying to prove that he/she knows something, S, to another person, B, without revealing S or anything about S.Answers Masked signature and Encrypted signature are distracters.

Explanation/Reference:
Explanation:
The Diffie-Hellman algorithm is the first asymmetric key agreement algorithm, which was developed by Whitfield Diffie and Martin Hellman.
Incorrect Answers:
A, B: The Diffie-Hellman algorithm does not offer encryption or digital signature functionality.
D: Non-repudiation requires digital signature functionality, which the Diffie-Hellman algorithm does not offer.
References:
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, pp. 812, 813, 830

Explanation/Reference:
Explanation:
Compiled code poses more of a security risk than interpreted code because of malicious code can be embedded in the compiled code and be difficult to detect.
Incorrect Answers:
B: Compiled code that fails would be an example of an application runtime error, which in itself is no security risk.
C: Compilers are to be trusted.
D: Compiled code is more of a security risk.
References:
Krutz, Ronald L and Russell Dean Vines, The CISSP and CAP Prep Guide:
Mastering CISSP and CAP, Wiley Publishing, Indianapolis, 2007, p 425