Cryptography A proposed API for full-memory encryption

I imagine a dark room where only sound can be applied for interaction with others in the room, you can communicate, but you do not know from where sound is coming. Which is a thing I need to accomplish ( permission less anonymity for both, service and the user).

It should be a decentralized network which for assignment have to anonymize services and users like dark room example above.

RSA public key would be an ip address(hash of it) and key for encryption to send message to owner of the key(address). Each message will be encrypted with RSA key, depends to who and who is sending the message so only the sender and receiver know the content of message.
Message(package) will go trough network until it find an owner.
Some cool semi-decentralized-apps should go on top of the network.
I am worry only about cryptography part so far.

I know that RSA is slow, but security should be choose over an network speed in this case.

Since public key of each node in the network will be available to most of the network, do you think RSA is still strong enough for this purpose?
Should I consider RSA safe for at least next 3-4 years ?

submitted by /u/zninja-bg
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Modelization of the entropy of randomness bias

Posted: 31 Jan 2019 11:28 AM PST

Hi (slightly misleading title to keep it short),

I'm trying to reason about a random token that has a bias in order to know how many bits of security it may represent.

Let's say a 16 bit key to keep it simple. If perfectly random it has 16 bits of security.

If I know that 80% of the time the first digit is a 1, how many digits of security can I say it has? 15.2? 15.8? That doesn't seem right to me to just say that you lose or gain 80% of a bit although it seems the most natural, a bit known at 100% and you lose exactly 1 bit.

There can also be more complicated situations, such as "I know that the last two bits are the same 80% of the time", how would one represent that?

The topic of randomness bias is an old one and I guess that angle has been discussed before but I couldn't find any reference on the topic.

submitted by /u/cym13
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[Hiring] Staff Cryptography Engineer @ Mozilla

Posted: 31 Jan 2019 07:12 AM PST

submitted by /u/infosec-jobs
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What Type of Key is this

Posted: 31 Jan 2019 09:21 AM PST

Hey this is a Public Key for Verification of a signature.

PTVW1ReUO1MoUwC71q2hHaZi4lbsYcaKcxPZikImYYN9gBJtnyy7phnkDOcoib_kSU3M98OZ_CmXINBc0FmYEBcecp-FS2ACcTIUnz2IdPcC5KRNoQrqxsExgbikmLXT

It's 96 bytes long with the first four bytes being

61

53

86

213

And this is the function to turn it back to an Array Buffer.

thing = thing.replace(/-/g, '+').replace(/_/g, '/');
// base64 to Uint8Array
var str = window.atob(thing);
var bytes = new Uint8Array(str.length);
for (var i = 0; i < str.length; i++) {
bytes[i] = str.charCodeAt(i);
}
thing = bytes;

Does anyone know a good way to determine what method of encryption was used to form the key.

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Cryptography A proposed API for full-memory encryption

Cryptography A proposed API for full-memory encryption

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