Experiments with the Cryptool Software

Cryptool 1

The Cryptool 1 software supports Cryptography algorithms under the following major headings:

• 1.

  Encrypt/Decrypt

• 2.

  Digital Signatures/PKI

• 3.

  Individual Procedures

• 4.

  Analysis

The algorithms in each of the above classes are discussed below:

Encrypt/Decrypt: Under this category, four different groups of algorithms are presented: Symmetric(classic), Symmetric(Modern), Asymmetric and Hybrid. The Classical symmetrical algorithms supported are: Caesar/Rot-13, Vegenere, Hill, Substitution/Atbash, Playfair, ADFGVX, Byte Addition, XOR, Vernam/OTP, Homophone, Permutation/Transposition, Solitaire, Scytale/Rail Fence.

The inputs to the above algorithms and the output from the Classical Symmetrical algorithms are presented below:

• Caesar/Rot-13:

• Input: ABCDEFGHIJKLMNOPQRSTUVWXYZ

• Key: 3

• Output: DEFGHIJKLMNOPQRSTUVWXYZABC (for Caesar)

• NOPQRSTUVWXYZABCDEFGHIJKLM (for Rot-13, No Key is Required)

• Vegenere:

• Input: ABCDEFGHIJKLMNOPQRSTUVWXYZ

• Key: ABCDEFGHIJKLMNOPQRSTUVWXYZ

• Output: ACEGIKMOQSUWYACEGIKMOQSUWY

• Hill:

• Input: ABCDEFGHIJKLMNOPQRSTUVWXYZ

• Key:

• Output: KUCOUIMCEWWQOKGEYYQSIMAGSA

• Substitution:

• Input: SUBSTITUTION

• Key: KEY

• Output: RTERSGSTSGNM

• Atbash:

• Input: ABCDEFGHIJKLMNOPQRSTUVWXYZ

• Output: ZYXWVUTSRQPONMLKJIHGFEDCBA

• Playfair:

• Input: AB CD EF GH IX IK LM NO PQ RS TU VW XY ZX

• Output: BC DE AK HI HY KF MN OP LU ST UQ WX YZ VY

• ADFGVX:

• Input: ABCDEFGHIJKLMNOPQRSTUVWXYZ

• Password: PASSWORD

• Output: AVFAVFAGDXGDXFAVFAVAADFFGVADDFGGAADFFGVDXGDXGDADDFGG

• Vernam/OTP:

• Input: ONETIMEPAD

• Key: ABCDEFGHIJKLMNOPQRSTUVWXYZ

• Output: 0E 0C 06 10 0C 0B 02 18 08 0E (in Hexadecimal format)

• Homophone:

• Input: ABCDEFGHIJKLMNOPQRSTUVWXYZ

• Key: random key

• Output: 98 A8 67 EB DA 4B 91 2B 96 C7 5F 13 46 D6 2A E7 08 BD F4 1F 0F B3 CD 8F 21 E1 (in hexadecimal Format)

• Permutation/Transposition:

• Input: ABCDEFGHIJKLMNOPQRSTUVWXYZ

• KEY: Key

• Output: JKLMNOPQRABCDEFGHISTUVWXYZ

• Solitaire:

• Input: ABCDEFGHIJKLMNOPQRSTUVWXYZ

• Keystream: 4,49,10,24,8,51,44,6,4,33,20,39,19,34,42,21,21,18,24,36,52,51,49,25,8,3

• Output: EYMBM EYNMQ EYFVE KLJQD UUTWG C

• Scytale/Rail Fence:

• Input: ABCDEFGHIJKLMNOPQRSTUVWXYZ

• Key: 2

• Output: EVYEM KBLMJ EQYDN UMUQT EWYGF C (Scytale)

• EYMBM EYNMQ EYFVE KLJQD UUTWG C (Rail Fence)