Crypt-analysis

-


                             Image result for cryptanalyst

  •  The goal of cryptanalysis is to find some weakness or insecurity in a cryptographic scheme, thus permitting its subversion or evasion.
  •  It is a common misconception that every encryption method can be broken.
  •  In connection with his WWII work at Bell Labs proved that the one-time pad cipher is unbreakable, provided the key material is truly random, never reused, kept secret from all possible attackers, and of equal or greater length than the message. 
  •  Most ciphers, apart from the one-time pad, can be broken with enough computational effort by brute force attack, but the amount of effort needed may be exponentially dependent on the key size, as compared to the effort needed to make use of the cipher.
  • In such cases, effective security could be achieved if it is proven that the effort required is beyond the ability of any adversary.
  • This means it must be shown that no efficient method can be found to break the cipher.
  •  Since no such proof has been found to date, the one-time-pad remains the only theoretically unbreakable cipher.

 .Click here  Crypt Systems....

Comments

Post a Comment

Popular posts from this blog

OpenID Connect Introduction

-
Image
What is OpenID Connect?? OpenID Connect is a simple identity layer built on top of the OAuth 2.0 protocol, which allows clients to verify the identity of an end user based on the authentication performed by an authorization server or identity provider (IdP), as well as to obtain basic profile information about the end user in an interoperable and REST-like manner. OpenID Connect specifies a RESTful HTTP API, using JSON as a data format.  OpenID Connect is an increasingly common authentication protocol: when an app prompts you to authenticate using your Facebook or Google+ credentials, the app is probably using OpenID Connect. OpenID Connect allows a range of clients, including web-based, mobile, and JavaScript clients, to request and receive information about authenticating  sessions and end-users. OIDC main purpose is to authenticate user one login and allow access to multiple services...
Read more

Find solution for Bandit war-game as a beginner level 0 - level 11

-
Image
This blogpost contains the solutions of how I solved the challenges of the OverTheWire Bandit category. The purpose of this wargame is to solve the current level’s problem to find the password for the next level. I had used the basic shell commands in this.   cd, cat, file, du, find, grep, sort, uniq, strings, base64, tr, tar, gzip, bzip2, xxd like that. level 0 :  Using putty give level 0 password as bandit0 and using hint found the level 1 password bandit0 ->ls -> cat readme -> exit level1 pw is : boJ9jbbUNNfktd78OOpsqOltutMc3MY1 level 1: Using level 1 password loging to level 1 Using hints found level 2 password bandit 1 -> ls -> cat ./-  -> exit level2 pw is :CV1DtqXWVFXTvM2F0k09SHz0YwRINYA9 level 2: Login to level 2 and go through the given hints. Using hint can found a file ,the file call  spaces in thi...
Read more