Blockstream to Unveil New Multisignature Standard

As reported, MuSig is a new Schnorr multisignature scheme for more compact and private multisig transaction
19 February 2019   895

The Blockstream company introduced a solution code called MuSig, which allows developers to test the technology of Schnorr signatures and find possible errors.

We’ve been turning MuSig from an academic paper into usable code, and this week we merged that code into secp256k1-zkp, a fork of secp256k1, the high-assurance cryptographic library used by Bitcoin Core, which we’ve extended to add Confidential Transaction support for Elements and Liquid.
 

Andrew Poelstra

Blockstream Team

The Blockstream developers posted the MuSig code, written in C, on GitHub and expressed the hope that the community would test a new solution and leave their feedback about it.

Schnorr Signatures - one of the most anticipated updates for the Bitcoin network. This solution can increase the confidentiality of transactions and improve the scalability of the first cryptocurrency.

The concept of signatures Schnorr involves the merging of signatures into one data input instead of processing each of them separately. Thus, by reducing the storage space on the blockchain, network bandwidth increases.

VirtualBox to Get Updates For 3 Versions

Versions 6.1.2, 6.0.16 and 5.2.36 were released, and, for example, 18 vulnerabilities were fixed in version 6.1.2
16 January 2020   110

Oracle has released a virtualization release for VirtualBox 6.1.2, which notes 16 fixes. At the same time, the corrective releases of VirtualBox 6.0.16 and 5.2.36 were also released.

Major changes in release 6.1.2:

  • 18 vulnerabilities were eliminated, of which 6 are of a high degree of danger (CVSS Score 8.2 and 7.5). Details are not reported, but judging by the CVSS level, some problems allow the code to be executed on the host system side from the guest environment;
  • On the host side, support for the Linux 5.5 kernel has been added (not yet supported on guest systems);
  • In additions for guest systems, when using the VMSVGA driver, processing of multi-monitor configurations and resizing of the workspace has been improved;
  • Improved virtio-scsi performance;
  • Added support (in read-only mode) for compressed clusters in QCOW2 images;
  • The problem that leads to reduced performance of guest systems with Windows XP on hosts with AMD processors has been resolved;
  • Correct reporting of CPUID IBRS / IBPB support has been established, which allowed to solve the problem with the crash of the NetBSD 9.0 RC1 installer;
  • The GUI resolved problems with updating information about the state of the virtual machine;
  • In the screen settings, the output of the option "2D video acceleration" is removed, if it is not supported by the selected graphics adapter;
  • The problem with the processing of audio input when turning on VRDE;
  • Fixed crash in the code for emulating HDA-sound in configurations with several speakers;
  • The problem with using encrypted disks with snapshots has been fixed;
  • The vbox-img.exe utility is returned to the installer for Windows;
  • When installing or removing a set of extensions in Windows, support for retrying a directory rename operation in the event of a failure, usually arising from antivirus activity, is implemented;
  • Windows includes hardware-based 2D video decoding if the VBoxSVGA driver with 3D active mode is used.

Get more at the changelog in the wiki of the project.