# All Questions

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### What benefit is there to using AES over my custom cipher for secure storage? [closed]

A lot is written about the security of AES but who needs such a high level of security and what kinds of messages are they enciphering? In these real-life situations, how are users managing the ...
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### Is Chaocipher a secure cipher under ciphertext-only attack?

Chaocipher was invented by John F. Byrne in 1919. The algorithm was recently revealed -- see Moshe Rubin's Chaocipher Revealed, the Algorithm While a known plaintext attack successfully finds the ...
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### Is this base64 encoding ? Help with decoding [closed]

I am looking at some data and it looks very much like base64 encoding. It has been suggested to me that this may be base64 encoding and then mathematical shifting. I tried decoding using an online ...
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### IV = Filename XOR CipherKey?

i want to encrypt transparently using Rijndael. So this is, what I thought of and I would like to have an opinion from "Experts" whether this will harm encryption strenght. I am using chunks of 1MB ...
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### Multi cipher CTR

What is your opinion on this scheme: 1)get IV from CSPRNG 2)set 3 encryption keys k1,k2,k3 (3*key_lenght) (KDF/PBKDF) 3)Use 3 ciphers in CTR mode like this: The initial IV is encrypted using ...
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### How exactly does the OpenSSL TLS heartbeat (Heartbleed) exploit work? [migrated]

I've been hearing more about the OpenSSL Heartbleed attack, which exploits some flaw in the heartbeat step of TLS. If you haven't heard of it, it allows people to: Steal OpenSSL private keys Steal ...