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 Yearling
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Jan
15
comment How to roll my own hardware RNG?
I do wish to know about your product. However I do have a US$5/each price point to beat for you guys. ATmega328P isn't too expensive as well, and for a flash drive form factor design I may even go with ATmega32U4 which have built-in USB interface, eliminating one chip further.
Jan
14
comment How to roll my own hardware RNG?
I have quite a stock of ATmega328P's. And I have the 16MHz crystals to go with them, making them really fast.
Jan
14
comment How to roll my own hardware RNG?
I have a price point and try beat this: US\$5 per device at most. Try beat this with pre-made solution. ATtiny85 cost me \$1, CH340G is another \$1, and other parts are less than \$0.1 (maybe less than $0.01) each.
Jan
14
comment How to roll my own hardware RNG?
ATtiny85 have quite a bit of memory on its own, and I do have the option to go to a bigger chip like ATmega328P which have even more memory on chip, as well as more IO, speed and external memory options. Both ATtiny85 and ATmega328P is dirt cheap here if ordered from Shenzhen.
Jan
8
comment How to roll my own hardware RNG?
ATTiny85 have enough computational power for mixing the streams, and the microcontroller plus the entropy sources consumes very little power and can be powered by a small Li-Po directly for years. CH340G is turned on only when USB is plugged in. ARM is just too big for this. Also try beat the US$1/each price for ATtiny85
Jan
7
comment How to roll my own hardware RNG?
In my plan (part of the question) I do have two random sources: Zener noise and electron tunnelling; I also have planned the microcontroller and USB: ATtiny85 microcontroller and CH340G USB UART interface.
Jan
7
comment How to roll my own hardware RNG?
Existing wheels can be sabotaged. Remember the ECDRBG NSA Backdoor? I need to make sure my HWRNG is not rigged in a way against me.
Jan
5
asked How to roll my own hardware RNG?
Sep
28
revised Cipher built from GPU primitives
added 121 characters in body
Sep
27
awarded  Yearling
Sep
27
asked Cipher built from GPU primitives
Jul
2
awarded  Curious
May
7
revised Is container format relevant to security of encrypted message inside?
Added the way MAC (or signature) is calculated
May
6
comment Is container format relevant to security of encrypted message inside?
@RickyDemer I forgot the asymmetrically encrypted symmetric key may appear in the file as well as key.bin. How to deal with that?
May
6
comment Is container format relevant to security of encrypted message inside?
@RickyDemer That is, algorithm should not appear in the container at all, and everything that is not MAC itself should be included in MAC?
May
6
asked Is container format relevant to security of encrypted message inside?
May
4
accepted How to design a secure data container?
Nov
6
comment How to design a secure data container?
@D.W. I also have licensing issue if GPG is employed.
Nov
5
comment How to design a secure data container?
@Reid Add some more chunk specs to allow nonce and chain of trust.
Nov
5
comment How to design a secure data container?
I am looking at a format that can both be sent and stored still. All hardware handling it may not have adequate computing power to do cryptography a lot so this container can be sent and stored across them without the need of decryption.