Small and/or fast ciphers and other cryptographic primitives designed for use in constrained environments, such as embedded MCUs and smart cards.

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1answer
94 views

Generating an IV for AES-CBC

I am faced with the task of generating a secure 256-bit IV for AES-CBC. I possess the following resources: A 32-bit microprocessor A 32-bit PRNG (can read/reseed) A 64-bit clock counter (can read) ...
0
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0answers
61 views

Lightest symmetric, fixed key, “Format preserving Encryption” algorithm?

message m = 49 bit string key k = any format but fixed Ciphertexts should be 49 bits long. Are there several "Format Preserving Encryption" algorithms? I want an algorithm that is as light as ...
0
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0answers
19 views

caesar cipher implemention and exection

I am trying to run one of the caesar cipher from https://competitions.cr.yp.to/caesar-submissions.html I have got the code for the cipher from https://github.com/floodyberry/supercop Can anyone help ...
1
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2answers
283 views

Lightweight Asymmetric encryption algorithm

I'm an embedded systems researcher, and new in the crypto field. Actually, I need to know if there are any lightweight asymmetric encryption algorithm especially considering the time needed for key ...
2
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0answers
72 views

Lightweight Cryptography and Gate Equivalents [closed]

If I design a lightweight cryptographic algorithm, how do I calculate gate equivalents (GE)?
2
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0answers
44 views

Differential Cryptanalysis

How do I find the differential characteristics using techniques Shrinking ? How do I extract the key on Differential Cryptanalysis using the technique Shrinking in Blockcipher Algorithm? Shrinking ...
9
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3answers
432 views

How is bitslicing faster?

I have read a paper on Bit Slicing and Lightweight crypto but cannot understand how bitslicing makes encryption scheme faster. Please can someone explain with an example exactly how bit slicing makes ...
3
votes
1answer
131 views

(Lightweight) Multicast one-way Authentication

Problem: I'm thinking about a lightweight solution to provide source authentication (only one source) to multiple receivers (multicast message). Context: Taking the problem to ground, we can think ...
3
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0answers
92 views

What is the lightweight key exchange protocol of choice?

Assume I have to implement a secure channel protocol by myself. Assume further that for some obscure reasons (library restrictions?) I can't use any of the pre-made libraries for SSH, TLS and such. ...
1
vote
1answer
219 views

CLEFIA vs AES 128-bit

I am running a comparison between CLEFIA(Lightweight cipher from Sony Corporation which is a standard now http://www.sony.net/Products/cryptography/clefia/standard/index.html) and AES 128-bit. The ...
1
vote
1answer
369 views

What is the most light-weight symmetric cipher thats still usefull?

I need a very light encryption scheme which costs almost no performance during encryption (while decryption may be slow). I found 5 algorithms: RC4, DES, LED, PRESENT, and Piccolo. But how do I ...
3
votes
1answer
266 views

Difference between lightweight, online and low memory Authenticated Encryption schemes

What is the basic difference between the following types of Authenticated Encryption (AE) schemes? Lightweight Authenticated encryption Online Authenticated Encryption Authenticated Encryption for ...
3
votes
0answers
132 views

Which encryption method supports random reads?

I have a file containing 16-bit samples and I want to encrypt it, but the problem is that I need to be able to read any random 16-bit value from the file, and be to able to decrypt it, without reading ...
1
vote
1answer
587 views

Smart Card Basics

I want to implement some of the basic encryption algorithms on smart card, could any body guide me how to program a smart card, which tools (hardware and software) I should have, and if these tools ...
9
votes
2answers
742 views

Are there any signature schemes for underpowered devices (8-bit microcontroller)?

I am currently researching into a small scale home automation system, aiming for cost. The system architecture is basically one master and several slaves which are connected in parallel. Recently i'...
3
votes
1answer
308 views

A situation where security by obscurity might be the best solution - or am I wrong?

Imagine the following situation. There is an application for a microcontroller-driven system. The profits are made from manufacturing and selling the device itself. However, it is expected, that the ...
2
votes
1answer
947 views

HASH Algorithm for 8 bits MCU

I need to implement the HASH algorithm (MD5 & SHA-1) on an 8 bit MCU. I hear it can only be implemented on 32bit and sometimes 16bits MCU. Is that possible? I will appreciate link where possible. ...
8
votes
2answers
727 views

Can one implement AES on 4-bit microcontroller?

It is possible to implement AES on 4-bit microcontroller? As far as I know, AES on 8-bit microcontroller are common especially for light weight application such as the RFID. I have yet to come across ...