In this example, you will learn about C program to encrypt and decrypt the string using two algorithms i.e. Caesar Cypher and RSA.
Encryption/Decryption using Caesar Cypher Algorithm |
Encryption/Decryption using RSA Algorithm |
#include #include void ChilkatSample(void) // Symmetric encryption algorithms are such that the encryptor and decryptor // share a pre-known secret key. This could be a 'single-use' key that is // derived from a secure key exchange algorithm using RSA, ECC, or Diffie-Hellman, // or it could be a password known to both sides, or // it could simply be the.
Example: C program to encrypt and decrypt the string using Caesar Cypher Algorithm.
For encryption and decryption, we have used 3 as a key value.
While encrypting the given string, 3 is added to the ASCII value of the characters. Similarly, for decrypting the string, 3 is subtracted from the ASCII value of the characters to print an original string.
Let's take a look at the program.
Output
#Encryption
#Decryption
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Rsa Encryption Calculator
https://dispacapan1973.mystrikingly.com/blog/. Explanation
In the above program, we have used simple logic for encrypting and decrypting a given string by simply adding and subtracting the particular key from ASCII value.
Example: C program to encrypt and decrypt the string using RSA algorithm.
RSA is another method for encrypting and decrypting the message. It involves public key and private key, where the public key is known to all and is used to encrypt the message whereas private key is only used to decrypt the encrypted message.
It has mainly 3 steps:
1: Creating Keys
- Select two large prime numbers x and y
- Compute
n = x * y
wheren
is the modulus of private and the public key - Calculate totient function,
ø (n) = (x − 1)(y − 1)
- Choose an integer
e
such thate
is coprime toø(n)
and1 < e < ø(n)
.e
is the public key exponent used for encryption - Now choose
d
, so thatd · e mod ø (n) = 1
, i.e., >code>d is the multiplicative inverse ofe
in mod ø (n)
2: Encrypting Message
Messages are encrypted using the Public key generated and is known to all.
The public key is the function of both e
and n
i.e. {e,n}
.
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If M
is the message(plain text), then ciphertext
#include #include void ChilkatSample(void) // Symmetric encryption algorithms are such that the encryptor and decryptor // share a pre-known secret key. This could be a 'single-use' key that is // derived from a secure key exchange algorithm using RSA, ECC, or Diffie-Hellman, // or it could be a password known to both sides, or // it could simply be the.
Example: C program to encrypt and decrypt the string using Caesar Cypher Algorithm.
For encryption and decryption, we have used 3 as a key value.
While encrypting the given string, 3 is added to the ASCII value of the characters. Similarly, for decrypting the string, 3 is subtracted from the ASCII value of the characters to print an original string.
Let's take a look at the program.
Output
#Encryption
#Decryption
Dec 07, 2014 Diablo 3 Code Generator is updated everyday so you'll not have problems, and is 100% safe, it use our Proxy and Anti-Ban Systems, So you don't need to worry about your Origin or Steam account. Key Generator is one of the few working tools out there and why buy when you can get them for free and 100% working. Utilize this Free Diablo 3 key generator tool for pc and for each gaming console, you will complete the work. Diablo 3 item codes generator is live here with no review and connection locker boisterous trap. So open the energy of boundless Diablo 3 pc key codes with single and direct connection. Diablo 3 keygen has no watchword and enactment codes over it so we have spare your valuable time. So how about we. Diablo 3 CD Key Generator One more game Action role-playing game developed by Blizzard Entertainment that Diablo 3 for PC, PS3 and Xbox 360. Actually, this game was released in 2012 for PC. Diablo 3 Key Generator – CD Keygen. It's been an inconceivable summerso and to laud it we have released our latest keygen – Diablo 3 key generator for the shameful Blizzard preoccupation for pc, xbox and ps3 stages. We have had numerous people sales to code a Diablo 3 keygen. Key code generator diablo 3. Sep 16, 2018 Diablo 3 Code CD Key Generator will certainly be valuable in enabling you to play Diablo 3. The Diablo-3-cd-key-generator is entirely cost-free. Instructions for using the Diablo-3-cd-key-generator: Generators now have the ability to generate an unlimited amount at once.
Rsa Encryption Calculator
https://dispacapan1973.mystrikingly.com/blog/. Explanation
In the above program, we have used simple logic for encrypting and decrypting a given string by simply adding and subtracting the particular key from ASCII value.
Example: C program to encrypt and decrypt the string using RSA algorithm.
RSA is another method for encrypting and decrypting the message. It involves public key and private key, where the public key is known to all and is used to encrypt the message whereas private key is only used to decrypt the encrypted message.
It has mainly 3 steps:
1: Creating Keys
- Select two large prime numbers x and y
- Compute
n = x * y
wheren
is the modulus of private and the public key - Calculate totient function,
ø (n) = (x − 1)(y − 1)
- Choose an integer
e
such thate
is coprime toø(n)
and1 < e < ø(n)
.e
is the public key exponent used for encryption - Now choose
d
, so thatd · e mod ø (n) = 1
, i.e., >code>d is the multiplicative inverse ofe
in mod ø (n)
2: Encrypting Message
Messages are encrypted using the Public key generated and is known to all.
The public key is the function of both e
and n
i.e. {e,n}
.
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If M
is the message(plain text), then ciphertext
3: Decrypting Message
The private key is the function of both d
and n
i.e {d,n}
.
Using Generated Keys For Encryption Rsa C 8
If C
is the encrypted ciphertext, then the plain decrypted text M
is
Here is an implementation of RSA in C program.
Rsa Encryption History
Output