Encryption story

[5/29, 12:46] Dr. Harish Ravi: I want to write a code to deencrypt a particular encryption thing I did at childhood.. it was most fun and I wanted to do it without a partner to remind myself.. kids helped in simple thing..

[5/29, 12:46] Dr. Harish Ravi: So wish me luck

[5/29, 12:54] Dr. Harish Ravi: I forgot the encryption after a summer trip for next summer after a year of school..

[5/29, 13:05] Dr. Harish Ravi: 1

if

a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u 21 v 22 w 23 x 24 y 25 z 26

Decode

19 16 13 12 16 26 13 28 21

If additive encryption scheme is not told to you n+x

[Program finished]

[5/29, 13:06] Dr. Harish Ravi: Can you guess the key and decode

[5/29, 13:20] Dr. Harish Ravi: A human can do it can a computer do it? It has to store the dictionary etc.. This was my childhood challenge..

[5/29, 13:22] Dr. Harish Ravi: I keep wondering.. accept me like this..

[5/29, 13:22] Dr. Harish Ravi: I keep wondering.. accept me like this..

[5/29, 13:51] Dr. Harish Ravi: 1

if

a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u 21 v 22 w 23 x 24 y 25 z 26

Decode if its n*a+b

3155 1237 1922 2744 689 2470 1237 2607 415 2059 2059 1648

[5/29, 13:51] Dr. Harish Ravi: its prime numbers. That's why you need quantum computers and supercomputers to break codes. I would like to try..

[5/29, 14:15] Dr. Harish Ravi: 1

if

a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u 21 v 22 w 23 x 24 y 25 z 26

Decode if its n*a+b and broken into two randoly sized chunks to add

116 3039 1096 141 55 1867 636 2108 290 399 1186 1284 393 844 1211 1396 119 296 1289 770 2028 31 952 696

[5/29, 14:15] Dr. Harish Ravi: this way younger people and cheaper computers can't easily add

[5/29, 14:15] Dr. Harish Ravi: a plan in childhood

[5/29, 14:17] Dr. Harish Ravi: Also you get a fun aspect in the way they think of random numbers

[5/29, 14:17] Dr. Harish Ravi: Also you get a fun aspect in the way they think of random numbers

[5/29, 14:26] Dr. Harish Ravi: Where's the fun in adding if you don't the crypt in first place.. that way humans can't keep up.. it's an ingenius way to talk just for fun

[5/29, 15:19] Dr. Harish Ravi: Because computers can't break codes, i was not interested in computer work.. i was not successful in computer job unless a boss forced me..

[5/29, 15:33] Dr. Harish Ravi: We have to encrypt with such a large set of numbers that it will take more time to type rather than crack codes..

[5/29, 15:54] Dr. Harish Ravi: Maybe this lingual alphanumeric codes are taught in childhood to some people to make them electrical engineers or computer scientists

[5/29, 16:28] Dr. Harish Ravi: For fun I am going to ask dad to encrypt and me trying to crack code and break the text..

[5/29, 16:47] Dr. Harish Ravi: Oh i tried dencrypting.. it was so hard couldn't do it in first try lol

[5/29, 17:50] Dr. Harish Ravi: This makes us put some effort into what the other person is saying.. while we think it's essy

[5/29, 17:50] Dr. Harish Ravi: One or two simple wins are nice..

[5/29, 19:49] Dr. Harish Ravi: So I made computer ji use 10 simple words, encrypt by adding 1 random no.. Then it chose 2 words and presented encrypted message...

Then i tried different numbers to find meaningful two words.. it worked a couple of times.. now I am happy..