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GnuPG is a hybrid-encryption software program because it uses a combination of conventional symmetric-key cryptography for speed, and public-key cryptography for ease of secure key exchange, typically by using the recipient's public key to encrypt a session key which is used only once.
The original creation of Gpg4win was initiated and funded by Germany's Federal Office for Information Security (BSI) in 2005, [2] [3] resulting in the release of Gpg4win 1.0.0 on 6 April 2006; [4] however Gpg4win and all included tools are free and open source software, and it is typically the non-proprietary option for privacy recommended [5] [6] to Windows users.
n-Trance Security Ltd 2005 Proprietary: Yes PGPDisk: PGP Corporation (acquired by Symantec in 2010) 1998-09-01 [25] Proprietary: Yes Private Disk: Dekart 1993 [26] Proprietary: Yes ProxyCrypt v77 2013 Open source: Yes R-Crypto R-Tools Technology Inc 2008 Proprietary: Yes SafeGuard Easy Sophos (Utimaco) 1993 [27] Proprietary: Yes SafeGuard ...
GnuPG community and g10code: C: Yes: ... By using the assistance of specific hardware, the library can achieve greater speeds and/or improved security than otherwise.
The cryptographic security of PGP encryption depends on the assumption that the algorithms used are unbreakable by direct cryptanalysis with current equipment and techniques. In the original version, the RSA algorithm was used to encrypt session keys. RSA's security depends upon the one-way function nature of mathematical integer factoring. [18]
In cryptography, a web of trust is a concept used in PGP, GnuPG, and other OpenPGP-compatible systems to establish the authenticity of the binding between a public key and its owner. Its decentralized trust model is an alternative to the centralized trust model of a public key infrastructure (PKI), which relies exclusively on a certificate ...
Journalists and security professionals rely on GnuPG, and Edward Snowden used it to evade monitoring whilst he leaked classified information from the U.S. National Security Agency. [4] Despite GnuPG's popularity, Koch has struggled to survive financially, earning about $25,000 per year since 2001 [2] and thus considered abandoning the project ...
NOTE: GnuPG 2.3.x is unaffected. GnuPG 2.2.23 is a fixed version." [11] "A flaw was found in the way certificate signatures could be forged using collisions found in the SHA-1 algorithm. An attacker could use this weakness to create forged certificate signatures. This issue affects GnuPG versions before 2.2.18." [12]