All Questions
Tagged with protocol-analysis public-key
8 questions
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Does Qrypt's BLAST protocol based on "Doubly-Affine Extractors" use public-key or symmetric-key cryptography?
The company Qrypt states that "Key distribution based on asymmetric algorithms is a weak link for cryptography" and claims to "enable encryption without distributing encryption keys&...
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Public key fingerprint verification for large groups
If you were designing:
An open source client that offered E2E encryption for e.g. folder sharing between users
Each user had public keys for signing (and separate public keys for encryption of ...
- 11
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Do you know protocols, where it is necessary to obtain several "independent" points on the same elliptic curve?
Consider an elliptic curve $E$ defined over a finite field $\mathbb{F}_{\!q}$ with a fixed non-zero $\mathbb{F}_{\!q}$-point $P$. For simplicity, let the order of the $\mathbb{F}_{\!q}$-point group $E(...
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Security of the Needham-Schroeder public key protocol after a minor adjustment
I'm preparing for a computer security exam by going through some past paper questions. And I came across this particular one that I could not answer:
We have the Needham Schroeder Public Key Protocol:...
- 111
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Key Distribution Center Key Protocol Analysis
As shown in the image, why is Circle 1 to be B and Circle 2 to be A?
Why is not the opposite, that is, Circle 1 to be A and Circle 2 to be B? like this picture
From my understanding, Notation B in ...
- 133
2
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Is this ECC based messaging method secure?
I developing an encrypted messaging for ZeroNet (aP2P file-based network, website: zeronet.io) and would like to have some guidelines if any of this could work.
My first idea:
In ZeroNet every user ...
- 21
3
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Re-sending captured encrypted data
Let’s assume Bob is some algorithmic stock trading machine. Bob takes commands from Alice, who sends messages to Bob.
For example: Alice could be sending a message to Bob to stop trading. But if ...
user28093
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Privacy and Integrity in Public Cryptography
I'm trying to figure out which is the best way to get privacy and integrity together in public cryptography.
Alice needs to send multiple files $f$ (may be big) to Bob.
I've thought:
Alice computes ...
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