# All Questions

18,451 questions
16 views

### How do I revoke aws smtp oauth token2 on iPhone [on hold]

How do I revoke oauth 2 tokens and phishing emails
54 views

### Attacking AES using Round 1 output

I was reading the paper Differential Scan Attack on AES with X-tolerant and X-masked Test Response Compactor and I have a question in the section Differential Scan Attack on AES. What I understand is ...
28 views

### How does MD5 divide the padded message in 16 words?

This is the image from a website that shows all the steps of the MD5 Hashing algorithm: The original message is 'Hello World!'. I don't understand where these values are coming from: For example the ...
25 views

### What is the difference between Google's API-Key, OAuth Client ID and AWS Secure Token Service

What is the difference between Google's API-Key, OAuth Client ID and AWS Secure Token Service? Are they are all just providing delegation tokens, except they are from different companies? Is there a ...
44 views

### How is EC key encoded in PKCS#8?

I just started working with certificates and signatures. For an application I write I need a key pair for ECDSA signatures, using the elliptic curve secp384r1 (aka NIST P-384). I produced such a key ...
38 views

### Getting the s-box input from its output in differential cryptanalysis on DES

If we try to get K4 using differential cryptanalysis on 4-variant DES, how can we get the input of a certain S-box if we know it's output? This seems hard to do since the substitution operation is ...
54 views

### Information theoretic secure encryption based on Quantum Key distribution [on hold]

Although it seems like a wildly adopted assumption that composing the One-time pad and QKD is secure, Maurer and Renner showed that this composition is not secure in the general sense. Indeed if the ...
52 views

### Type of Encryption Given The Ciphertext [on hold]

I am trying to decode a ciphertext that composes of numbers and letters with a length of 56 bits, where the last three characters are ===. I'm not sure which type ...
42 views

### How does AWS Secret key and access key work

Those keys are too short to be public/private RSA keys. What are they? How does it use them to authenticate the client? My guess is: AWS access key ID is a form of unique user/account identifier AWS ...
41 views

### How Many matrix inverse of mod 26 [on hold]

I want to know is it possible to calculate How Many matrix inverse of mod 26
81 views

### Differential and Linear trail propagation in Noekeon

In the Noekeon Cipher Specification they write the following : The propagation through Lambda is denoted by $(a \rightarrow A)$, also called a step. Because of the linearity of Lambda it is fully ...
31 views

### Unbreakable Ciphertext using hill cipher [on hold]

Can anyone help me out by solving this ciphertext using m =2 TUNAISYPLUKUDDDPOOCZZLLCUDVDCYXJEKYIKORRPVAIYPGUUC
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### Meaning of the $m$ power of a modular world

A cryptosystem is defined by a 5 tuple $(P,C,K,E,D)$=(plain text, cipher text, key, encryption function, decryption function) So, my question is with the definition given for permutation cipher, ...
50 views

### How to decode unidentified encrypted string? [closed]

I have been given a task for decoding this "I5ZGKYLUEBVG6YRAMZUWO5LSNFXGOIDPOV2CAZLOMNXWI2LOM4QSC===" But I am not sure that what type of encryption is this? Can anybody help me out on this?
72 views

### Transparent Setup of SNARKs

The STARKs paper states Third, and most important, ZK-PCPs are transparent (or “public randomness” ), which means that the randomness used by the verifier is public; in particular, setting up a ...
32 views

### Assumptions underlying the soundness of STARKs

STARKs have recently received quite a lot of attention due to their small proof size and supposedly simple assumptions. The paper introduction itself seems to mainly state that their construction is ...
51 views

53 views

### Guessing the key in AES256-GCM?

I assume that my case is weird but I've the following information: IV: 0x263e or 0x3e26 Auth tag: 0x25 AES256-GCM encrypted payload: 0x4eec96df534ade4c013a AES256-GCM decrypted payload: ...
25 views

### How encrypt with RSA and no padding in dotnet core [closed]

First: yes, I am aware that this approach is not very secure. However, I need to reproduce the encryption results of another project written in swift in a dotnet core API. The long and short of it is ...