Public-key Cryptography: Theory and Practice

D. Hints to Selected Exercises

The greatest thing in family life is to take a hint when a hint is intended and not to take a hint when a hint isn’t intended.

—Robert Frost

Teachers open the door, but you must enter by yourself.

—Chinese Proverb

Imagination grows by exercise, and contrary to common belief, is more powerful in the mature than in the young.

—W. Somerset Maugham

2.11 (a)	Apply Theorem 2.3 to the restriction to H of the canonical homomorphism G → G/K.
2.11 (b)	Apply Theorem 2.3 to the canonical homomorphism G/H → G/K, aH ↦ aK, .
2.14 (c)	Consider the canonical surjection G → G/H.
2.17 (a)	Let i ≠ j and . Then ord g divides both and ...