B
B
by_EL2020-01-02 14:14:00
Encryption
by_EL, 2020-01-02 14:14:00

How does asymmetric encryption protect against a type of replay attack?

I know how PKİ technology + signed certificate works and all, but one thing I don't understand what asymmetric encryption technologies protect against type of replay attacks
Please explain in simple terms Thank you all in advance for your help

Answer the question

In order to leave comments, you need to log in

2 answer(s)
1
15432, 2020-01-02
@15432

For example, the Diffie-Hellman protocol involves the use of random data. Each time a new key is generated, therefore, it is almost impossible to repeat the generation of exactly the same key.
In other algorithms, for example, with each successful transmission, a certain counter on each side is increased, which is also placed in the encrypted packet - we get that with the same key, the data differs each time. And during subsequent transmissions, by comparing the counter, you can make sure that this is a repetition.

X
xmoonlight, 2020-01-02
@xmoonlight

Rotation of the secret key and calculation of the hash from the key and transmitted data both when receiving data and when transmitting it.
An incorrect key when decrypting the next portion of the received data signals a replay attack.

Didn't find what you were looking for?

Ask your question

Ask a Question

731 491 924 answers to any question