Key Permutation Part 3

Encryption 101 Cipher Algorithm operations
1 minutes
Share the link to this page
Copied
  Completed
You need to have access to the item to view this lesson.
One-time Fee
$69.99
List Price:  $99.99
You save:  $30
€59.56
List Price:  €85.09
You save:  €25.53
£52.09
List Price:  £74.42
You save:  £22.32
CA$95.86
List Price:  CA$136.96
You save:  CA$41.09
A$106.62
List Price:  A$152.33
You save:  A$45.70
S$89.60
List Price:  S$128
You save:  S$38.40
HK$549.36
List Price:  HK$784.84
You save:  HK$235.47
CHF 55.22
List Price:  CHF 78.89
You save:  CHF 23.67
NOK kr711.08
List Price:  NOK kr1,015.87
You save:  NOK kr304.79
DKK kr444.69
List Price:  DKK kr635.30
You save:  DKK kr190.61
NZ$116.28
List Price:  NZ$166.12
You save:  NZ$49.84
د.إ257.03
List Price:  د.إ367.21
You save:  د.إ110.17
৳8,541.65
List Price:  ৳12,202.88
You save:  ৳3,661.23
₹6,054.57
List Price:  ₹8,649.76
You save:  ₹2,595.18
RM295.46
List Price:  RM422.10
You save:  RM126.64
₦106,898.60
List Price:  ₦152,718.84
You save:  ₦45,820.23
₨19,849.54
List Price:  ₨28,357.70
You save:  ₨8,508.16
฿2,271.08
List Price:  ฿3,244.54
You save:  ฿973.46
₺2,838.57
List Price:  ₺4,055.28
You save:  ₺1,216.70
B$389.46
List Price:  B$556.40
You save:  B$166.93
R1,243.39
List Price:  R1,776.35
You save:  R532.95
Лв116.68
List Price:  Лв166.70
You save:  Лв50.01
₩96,819.61
List Price:  ₩138,319.66
You save:  ₩41,500.05
₪234.83
List Price:  ₪335.49
You save:  ₪100.65
₱3,999.92
List Price:  ₱5,714.42
You save:  ₱1,714.50
¥10,334.44
List Price:  ¥14,764.12
You save:  ¥4,429.68
MX$1,297.53
List Price:  MX$1,853.70
You save:  MX$556.16
QR254.68
List Price:  QR363.85
You save:  QR109.16
P940.45
List Price:  P1,343.55
You save:  P403.10
KSh9,027.18
List Price:  KSh12,896.52
You save:  KSh3,869.34
E£3,436.97
List Price:  E£4,910.17
You save:  E£1,473.20
ብር9,723.36
List Price:  ብር13,891.11
You save:  ብር4,167.75
Kz63,827.73
List Price:  Kz91,186.38
You save:  Kz27,358.65
CLP$66,407.84
List Price:  CLP$94,872.41
You save:  CLP$28,464.56
CN¥501.70
List Price:  CN¥716.75
You save:  CN¥215.04
RD$4,239.25
List Price:  RD$6,056.33
You save:  RD$1,817.08
DA9,047.25
List Price:  DA12,925.20
You save:  DA3,877.94
FJ$156.97
List Price:  FJ$224.25
You save:  FJ$67.28
Q536.28
List Price:  Q766.14
You save:  Q229.86
GY$14,618.16
List Price:  GY$20,883.98
You save:  GY$6,265.82
ISK kr8,471.36
List Price:  ISK kr12,102.46
You save:  ISK kr3,631.10
DH628.31
List Price:  DH897.62
You save:  DH269.31
L1,175.20
List Price:  L1,678.94
You save:  L503.73
ден3,667.34
List Price:  ден5,239.29
You save:  ден1,571.94
MOP$564.91
List Price:  MOP$807.05
You save:  MOP$242.13
N$1,240.05
List Price:  N$1,771.58
You save:  N$531.52
C$2,577.33
List Price:  C$3,682.06
You save:  C$1,104.73
रु9,675.58
List Price:  रु13,822.85
You save:  रु4,147.27
S/247.46
List Price:  S/353.54
You save:  S/106.07
K289.58
List Price:  K413.71
You save:  K124.12
SAR262.59
List Price:  SAR375.15
You save:  SAR112.55
ZK1,633.79
List Price:  ZK2,334.09
You save:  ZK700.29
L301.94
List Price:  L431.36
You save:  L129.42
Kč1,463.97
List Price:  Kč2,091.48
You save:  Kč627.50
Ft23,632.81
List Price:  Ft33,762.61
You save:  Ft10,129.79
SEK kr666.87
List Price:  SEK kr952.71
You save:  SEK kr285.84
ARS$88,944.65
List Price:  ARS$127,069.23
You save:  ARS$38,124.58
Bs482.78
List Price:  Bs689.72
You save:  Bs206.93
COP$284,541.20
List Price:  COP$406,504.86
You save:  COP$121,963.65
₡35,297.30
List Price:  ₡50,426.88
You save:  ₡15,129.57
L1,829.56
List Price:  L2,613.77
You save:  L784.21
₲524,659.52
List Price:  ₲749,545.73
You save:  ₲224,886.20
$U2,804.51
List Price:  $U4,006.62
You save:  $U1,202.10
zł253.17
List Price:  zł361.69
You save:  zł108.51
Already have an account? Log In

Transcript

So permutation is one of the first steps of one of the first techniques that we use when we generate a key and we want to use that key with the cipher algorithm. We take the key, and we use a permutation table that will take the original input and map it to another output. Let's make it a bit more visual a bit more graphical. So we have the original key, we have our permutation table. And now we decide due to the permutation table, that the bitstream that is value is zero, will map to a bit that its value is six, and a bit value of seven will map to a bit value of zero. So, are bit value of 000 which equals to zero will map to 110, which equals to six and a bit values that is 111.

That is all eight possible options, which is the value is seven will map to a bit value of zero. And so we change our key from its original value to another different value. This is one technique that is being used to make our key to make our cipher much more confusing for an attacker.

Sign Up

Share

Share with friends, get 20% off
Invite your friends to LearnDesk learning marketplace. For each purchase they make, you get 20% off (upto $10) on your next purchase.