What is preimage resistance? (Select the best answer.)

RSA-OAEP is a symmetric encryption scheme based on RSA and the Optimal Asymmetric Encryption Padding (OAEP) method.

Decreasing the key size of a cipher is useful to make an exhaustive key search harder.

A combination of an encryption algorithm and a decryption algorithm is called a key.

An ambulance is generating a siren sound at a frequency of 2,000 Hz. The speed of sound is 345.0 m/s. The observer and the ambulance are traveling toward each other at a velocity of 24.00 m/s. If the observer is stationary, what is the frequency of the siren perceived by the observer?

What is the remainder when 98 is divided by 9?

Which of the following statements is/are true about Data Encryption Standard (DES)? (Select all that apply.)

What is a result of 32 mod 5?

A rod is 2.40 m long and has a diameter of 2.50 mm. A force of 2000 N is applied to the end, stretching the rod by 1.40 mm. What is the elastic modulus for this rod?

Two point charges are on the x-axis. One charge, q1 = 10.0 nC, is located at the origin, and the other charge, q2 = 18.0 nC, is located at x = 9.00 m. What is the force on q2? (Note: nC = x 10-9 C;  nN = x 10-9 N:  pN = x 10-12 N)