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ARM `IT` predication is architecturally unsafe for crypto implementations (timming leak of condition flags, POC for cortex-m85)
As they confirmed by mail: "You're correct, IT predicates are considered control flow (and absented from the guarantees provided by DIT)" Affected should be mostly assembly implementations, as this is the area where one expects it to be constant time, …
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Small primes 2-509 before Miller-Rabin?
Primality testing examples found online all say to first check against "a number of" small primes before invoking Miller-Rabin. For my hobby project in Forth, I've authored a routine to test against the first 97 primes. From 2 through 509, …
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Regular Elliptic Curve Diffe Hellman vs Curve25519 (X25519) diffe hellman
As the post says, im struggling to understand the difference between the regular and x25519 diffe hellman functions. For an assignment i need to produce a lightweight crytpographic system that encrypts with a symmetric Cipher and then encrypts that key …
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Let's say I have quantum computer - How do I mine BTC?
For the sake of argument assume I have 10.000 qubit quantum computer, not via extensive hardware, but with math & algo on a classcial computer. I have reversible engine with both Clifford and Non Clifford gates. Now, how do I …
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SHA256 collision: The Kaoru Method
I don't think I know enough to comment on this, hence posting here [The Kaoru Method: Linearizing SHA-256 via Universal Fractional Space Mapping and Carry Reconstruction](https://osf.io/jd392/overview) More: - [Unexpected 186-bit SHA-256 quasi-collision: Is this mathematically possible with consumer hardware or …
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Scholar Labs for Crypto?
Has anyone tried out Scholar Labs for crypto research? Is it any good?