- Note: To get Adobe Reader XI 11.0.21 you can either download Adobe Reader XI 11.0.00 (Adobe Reader XI 11.0.00 download link) and during the installation choose to install the latest updates - this.
- Users of Acrobat Pro Extended's 3D features are now directed to Tetra4D, who have taken over development and support of the 3D engine from Adobe. Their 3D PDF Converter plugin for Acrobat X Pro does support the latest versions of 3D files and comes with a.
Adobe Reader is now Adobe Acrobat DC. Version 15.0.0 was released on April 7, 2015, supporting iOS 8.0 and above. The new features include: Easily accomplish frequent tasks from the new Tools menu; View recent files across computers and devices with Mobile Link; Use free Adobe Fill & Sign to fill, sign, and send forms on your iPad. Adobe reader 9 latest version free download.
If you want full compatibility with all versions of PDF documents, then the only original PDF viewer is from the source and that is Adobe. Adobe PDF documents are universally used in business, education and personal exchanges and the documents themselves can contain very rich graphics and diagrams.
Adobe Reader XI is the standard in PDF document viewing, yet it does lack in several areas. Firstly, Adobe Reader XI can be painfully slow at times and with the awesome amount of ability it packs into one program, I suppose it isn't too abnormal that it might at times slow down. Still, there are many different free PDF readers available and many are choosing not to use Adobe.
The benefits of running Adobe PDF Reader XI are negligible compared to many of the other options, so if you must, install this program. Otherwise, take a look around for some faster programs like Foxit's free PDF reader.
Adobe Reader XI is software which can read PDF files.
Features and highlights
- Easily view, print, and collaborate on PDF files with free Adobe Reader X software
- Access to all PDF files
- Enhanced commenting tools
- Signing PDF documents
- Access online services at Acrobat.com
Adobe Reader XI on 32-bit and 64-bit PCs
This download is licensed as freeware for the Windows (32-bit and 64-bit) operating system on a laptop or desktop PC from pdf software without restrictions. Adobe Reader 11.0.23 is available to all software users as a free download for Windows 10 PCs but also without a hitch on Windows 7 and Windows 8.
Filed under:- Adobe Reader XI Download
- Freeware PDF Software
- Portable Software
- Major release: Adobe Reader XI 11.0
- PDF Viewing Software
The PDF 2.0 features discussed below are not completely new, but have already been introduced with earlier Acrobat versions.
Acrobat 9 Features
The following features have been implemented in Acrobat 9 (2008) and are specified in PDF 1.7 Adobe Extension Level 3:
- Multimedia content such as sound and video can be stored in RichMedia annotations and played with actions of type RichMediaExecute. RichMedia annotations support the interaction and combination of sound, video, and 3D artwork (samples).
- 2D and 3D geospatial data can be added so that page content can be registered geospatially. Geospatial reference data defines the relationship of page contents and geographic regions using one of several common geospatial models of the earth (samples). Although PDF 1.7 Extension Level 3 and PDF 2.0 allow geospatial information to be attached to a page, an image or a Form XObject, Acrobat DC and below support geospatial data only on the page level.
- Support for 3D artwork in U3D format is already available in PDF 1.7, while PDF 2.0 adds support for 3D artwork in the PRC format according to ISO 14739-1:2014. PRC support has been added in Acrobat 8.1.
- Projection annotations store measurements and comments for 3D annotations.
- PDF collections (portfolios) are already available in PDF 1.7. Acrobat 9 added support for nested folders and a Flash-based navigator. While hierarchical collections are part of PDF 2.0, Flash-based navigators are not supported; they have been replaced with a set of predefined (named) navigators such as navigators for a tiled view, a strip of thumbnails, or a tree-like presentation.
File attachments may be assigned a thumbnail image. - Acrobat 9 extended AES encryption to support Unicode passwords and 256-bit keys. Unicode passwords are part of PDF 2.0. However, due to shortcomings in the password handling the Acrobat 9 algorithm is not included in PDF 2.0 (see here for more information).
Acrobat 9 also introduced barcode fields which are text fields containing dynamic barcodes in the formats PDF417, Data Matrix or QR code (sample). However, barcode fields are not included in PDF 2.0.
The features below have been implemented in Acrobat X (2010) which formally creates documents according to PDF 1.7 Adobe Extension Level 8. However, Adobe never published the specification of Extension Level 8:
- The existing AES-based encryption has been overhauled to fix the security flaws found in the Acrobat 9 algorithm. The method for deriving the file encryption key from the user password is different than the one in Acrobat 9. While Acrobat X supports AES-128 and AES-256, PDF 2.0 deprecates the use of AES-128 and encourages only AES-256.
- Digital signatures according to the PAdES standards ETSI TS 102 778 and ETSI EN 319 142; see here for more information. PAdES includes improvements to the actual signature by protection against a threat scenario called certificate substitution, support for the Document Security Store (DSS) which can be used to attach validation material to a signed PDF document, as well as document time-stamps and long-term validation (LTV).
Adobe Reader Xi Features
Adobe Reader XI is software which can read PDF files.
Features and highlights
- Easily view, print, and collaborate on PDF files with free Adobe Reader X software
- Access to all PDF files
- Enhanced commenting tools
- Signing PDF documents
- Access online services at Acrobat.com
Adobe Reader XI on 32-bit and 64-bit PCs
This download is licensed as freeware for the Windows (32-bit and 64-bit) operating system on a laptop or desktop PC from pdf software without restrictions. Adobe Reader 11.0.23 is available to all software users as a free download for Windows 10 PCs but also without a hitch on Windows 7 and Windows 8.
Filed under:- Adobe Reader XI Download
- Freeware PDF Software
- Portable Software
- Major release: Adobe Reader XI 11.0
- PDF Viewing Software
The PDF 2.0 features discussed below are not completely new, but have already been introduced with earlier Acrobat versions.
Acrobat 9 Features
The following features have been implemented in Acrobat 9 (2008) and are specified in PDF 1.7 Adobe Extension Level 3:
- Multimedia content such as sound and video can be stored in RichMedia annotations and played with actions of type RichMediaExecute. RichMedia annotations support the interaction and combination of sound, video, and 3D artwork (samples).
- 2D and 3D geospatial data can be added so that page content can be registered geospatially. Geospatial reference data defines the relationship of page contents and geographic regions using one of several common geospatial models of the earth (samples). Although PDF 1.7 Extension Level 3 and PDF 2.0 allow geospatial information to be attached to a page, an image or a Form XObject, Acrobat DC and below support geospatial data only on the page level.
- Support for 3D artwork in U3D format is already available in PDF 1.7, while PDF 2.0 adds support for 3D artwork in the PRC format according to ISO 14739-1:2014. PRC support has been added in Acrobat 8.1.
- Projection annotations store measurements and comments for 3D annotations.
- PDF collections (portfolios) are already available in PDF 1.7. Acrobat 9 added support for nested folders and a Flash-based navigator. While hierarchical collections are part of PDF 2.0, Flash-based navigators are not supported; they have been replaced with a set of predefined (named) navigators such as navigators for a tiled view, a strip of thumbnails, or a tree-like presentation.
File attachments may be assigned a thumbnail image. - Acrobat 9 extended AES encryption to support Unicode passwords and 256-bit keys. Unicode passwords are part of PDF 2.0. However, due to shortcomings in the password handling the Acrobat 9 algorithm is not included in PDF 2.0 (see here for more information).
Acrobat 9 also introduced barcode fields which are text fields containing dynamic barcodes in the formats PDF417, Data Matrix or QR code (sample). However, barcode fields are not included in PDF 2.0.
The features below have been implemented in Acrobat X (2010) which formally creates documents according to PDF 1.7 Adobe Extension Level 8. However, Adobe never published the specification of Extension Level 8:
- The existing AES-based encryption has been overhauled to fix the security flaws found in the Acrobat 9 algorithm. The method for deriving the file encryption key from the user password is different than the one in Acrobat 9. While Acrobat X supports AES-128 and AES-256, PDF 2.0 deprecates the use of AES-128 and encourages only AES-256.
- Digital signatures according to the PAdES standards ETSI TS 102 778 and ETSI EN 319 142; see here for more information. PAdES includes improvements to the actual signature by protection against a threat scenario called certificate substitution, support for the Document Security Store (DSS) which can be used to attach validation material to a signed PDF document, as well as document time-stamps and long-term validation (LTV).
Adobe Reader Xi Features
Acrobat XI Features
Adobe Reader X Features App
The following features have been specified in individual documents and implemented in Acrobat XI (2012):
Adobe X Reader Download Free
- Digital signatures have previously been limited to the RSA and DSA signature schemes. Acrobat XI introduced support for signatures according to Elliptic Curve Cryptography (ECC). Acrobat XI and DC support only the most common elliptic curves recommended by NIST per RFC 5480 (list of algorithms supported in Acrobat). Other common elliptic curves including the Brainpool curves (RFC 5639), and the modern Curve25519 (RFC 7748) are not supported in Acrobat. See here for more details regarding Elliptic Curve cryptography in PDF.
- Acrobat XI and above support Elliptic Curve Cryptography (ECC) for public key encryption, also called certificate security (list of algorithms supported in Acrobat). See here for more information on certificate security. The only symmetric algorithm for use in certificate security endorsed by PDF 2.0 is AES-256. All other algorithms supported in earlier PDF and Acrobat versions are declared as deprecated, including DES, Triple-DES, AES-128 and AES-192.
