analysing cryptographic algorithms, potentially uncovering weaknesses in them (e.g. "breaking" them or casting doubts on their actual security)

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2answers
898 views

finding collision for truncated SHA1 hash output

Suppose we truncate only 40 bits of sha1 hash output.hence it is insecure.how can we find two message as input which gives first 40 bits of hash as same value i.e we have to find collision for first ...
-3
votes
1answer
134 views

ASCII Message in TV show? [closed]

So I was watching a popular series tonight (Person Of Interest) when suddenly during a frame change I noticed a very quick blue screen with writing. At the time I never thought anything of it as it ...
-3
votes
1answer
32 views

cipher inside and image [closed]

I have a short cipher of (33) characters , which is only ascii characters. From this information. Is it possible to guess what kind of encryption was that?
-4
votes
2answers
202 views

Any techniques for evading frequency based crypt analysis without encrypting?

Are there any general techniques for evading frequency based crypt analysis without using any encryption techniques?
-4
votes
1answer
159 views

Can someone tell if my Hand Cipher is secure? [closed]

In easy steps, this is how it works: Convert txt to numbers. mod 1-26. Generate random numbers (by my other cipher) equal to plain txt. Write random numbers under txt numbers. Like this: ...
-4
votes
0answers
49 views

Is this cyphering method a really durable breakthrough innovation ? or not [on hold]

I know, Security Breakthrough Innovation is quite "a {m,b,t...}illion throws for one hit" Furthermore, I am not a Cryptopath. Nor a Professional Paranoid. The keys: - why byte? byte is the ...
-5
votes
4answers
801 views

Found a way to crack AES-128, what now?

I have just found a way to crack AES-128 in a reasonable time (1-2 days). How do I publish and prove this? I remember reading about lots of people who cracked DES and other ciphers but how did they ...