Secret key agreement protocol between legal parties based on reconciliation and privacy amplification procedure has been considered in [2]. The so called privacy amplification theorem is used to estimate the amount of Shannon’s information leaking to an illegal party (passive eavesdropper) about the final key. We consider a particular case where one of the legal parties (Alice) sends to another...

Background: Solid targets that consist of powder and electrodeposited targets are used commonly to produce radionuclides by accelerators. Since silver is easily electrodeposited in cyanide baths and has a very excellent thermal conductivity, the electrodeposited target is preferable to produce 109Cd. To avoid cracking or peeling of the target during bombardment, it should have a level surface a...

Nuclear interactions of the projectile carbon ion in biological soft tissue for cancer treatment purpose are studied. Elastic interaction of carbon ion with carbon, oxygen and nitrogen nuclei existing in soft tissue leads to beam divergence especially in Bragg peak region, where the carbon ion is slowing down. Monte Carlo simulation shows the amount of carbon ion beam divergence in soft tissue....

(a) Alice and Bob wish to resolve a dispute over telephone. We can encode the possibilities of the dispute by a binary value. For this they engage a protocol: i. Alice → Bob: Alice picks up randomly an x, which is a 200 bit number and computes the function f(x). Alice sends f(x) to Bob. ii. Bob → Alice: Bob tells Alice whether x was even or odd. iii. Alice → Bob: Alice then sends x to Bob, so t...

Alice is a user. Clyde is a cloud service provider. Alice has a bunch of very large files containing many, many words. Alice wants to store the files in the cloud. Alice wants to do a particular form of private information retrieval (PIR); specifically: Alice wants to determine which file or files contain a given target word. Alice wants Clyde to do the necessary computations (or most of the co...

(received ; accepted) PACS. .89.90n – Computer science and technology. Abstract. – A public-key cryptosystem, digital signature and authentication procedures based on a Gallager-type parity-check error-correcting code are presented. The complexity of the encryption and the decryption processes scale linearly with the size of the plaintext Alice sends to Bob. The public-key is pre-corrupted by B...

The security of information is an indispensable element of a communication system when transmitted signals are vulnerable to eavesdropping. This issue is a challenging problem in a wireless network as propagated signals can be easily captured by unauthorized receivers, and so achieving a perfectly secure communication is a desire in such a wiretap channel. On the other hand, cryptographic algor...

Two schemes for quantum secure conditional direct communication are proposed, where a set of EPR pairs of maximally entangled particles in Bell states, initially made by the supervisor Charlie, but shared by the sender Alice and the receiver Bob, functions as quantum information channels for faithful transmission. After insuring the security of the quantum channel and obtaining the permission o...