Cryptography Stack Exchange

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• Cryptography Stack Exchange

  Q&A for software developers, mathematicians and others interested in cryptography

• Newest Questions - Cryptography Stack Exchange

  I am dealing with a case as follows: P = 73, Q = 97. N = 7081, phi(N) = 6912. e = 7. Now, to find decryption exponent 'd' we have to satisfy: (e * d) mod phi(N) = 1 - (i). Aliter: d = e^(-1) mod phi(N...

• Tour - Cryptography Stack Exchange

  midhunhk 2 Answers 4 ECB is not secure, it leaks information. CBC is better. But if you need random access to your file Use CTR mode. For more information about Block cip...

• key exchange - Number of keys when using symmetric and asymmetric encryption? - Cryptography Stack

  Quoting part of my homework/assignment: How many keys are required for secure communication among 1000 person if: Symmetric key encryption algorithm is used? Asymmetric key encryption

• public key - How does asymmetric encryption work? - Cryptography Stack Exchange

  I've always been interested in encryption but I have never found a good explanation (beginners explanation) of how encryption with public key and decryption with private key works. How does it enc...

• Key derivation functions (KDF): What are they, what are their main purposes and how they can be used

  What are KDFs? What are their main purposes? How they can be used, in other words, what's their drill in a cryptography scheme?