{"id":3058,"date":"2019-01-03T16:08:30","date_gmt":"2019-01-03T14:08:30","guid":{"rendered":"http:\/\/blog.atola.com\/?p=3058"},"modified":"2022-10-26T14:45:36","modified_gmt":"2022-10-26T12:45:36","slug":"calculating-hash-during-imaging-2","status":"publish","type":"post","link":"https:\/\/atola.com\/blog\/calculating-hash-during-imaging-2\/","title":{"rendered":"Calculating hash in the course of imaging"},"content":{"rendered":"

Atola TaskForce supports hash calculation of both the evidence drive and the image in conjunction with imaging. We have developed highly\u00a0flexible functionality to help optimize evidence acquisition process to fit one\u2019s internal procedures\u00a0while avoiding further damage to fragile media.<\/p>\n

To calculate hash of both the evidence and the image:<\/p>\n

    \n
  1. Click Image<\/i> category of the left-side menu<\/li>\n
  2. Select the Source device and the Target device or file<\/li>\n
  3. Click Change<\/i> button in the Settings summary page<\/li>\n
  4. In the Hashes<\/i> tab there are three checkboxes:<\/li>\n<\/ol>\n
      \n
    • Pre-hash source device<\/em><\/li>\n
    • Hash source during imaging<\/em><\/li>\n
    • Post-hash target device<\/em><\/li>\n<\/ul>\n
      \"Selecting

      Select hash methods<\/p><\/div>\n

       <\/p>\n

      Multiselect is available, which allows a user to use all three of these options.<\/p>\n

      However, Pre-hash source drive<\/em> option must be used with caution: although pre-hashing can be required by an investigator\u2019s internal procedures,
      \nwhen dealing with drives that have been diagnosed with hardware failure, this operation may cause further damage to the drive before essential data is imaged.<\/p>\n

      On the contrary, Hash source during imaging<\/em> is the most appropriate way to calculate the hash of a fragile source evidence drive.
      \nIn this case, TaskForce only needs to read the data on the drive once to image and calculate hash\u00a0simultaneously, thus minimally using the drive\u2019s hardware.<\/p>\n

      NB<\/strong> Linear hash can only be calculated by reading data in sectors consecutively in one pass. When it encounters a bad sector, linear hash calculation is discontinued. Thus it shows resulting hash values up to the first bad sector.
      \nIn upcoming releases, we will support Segmented hashing so that hash can be calculated for damaged drives.<\/i><\/p>\n

      Post-hash target device<\/em> option allows to properly record the calculated hash in the case.<\/p>\n

      \"Imaging

      Imaging results with hash values for both hash during imaging and post-hash<\/p><\/div>\n

       <\/p>\n","protected":false},"excerpt":{"rendered":"

      Atola TaskForce supports hash calculation of both the evidence drive and the image in conjunction with imaging. We have developed highly\u00a0flexible functionality to help optimize evidence acquisition process to fit one\u2019s internal procedures\u00a0while avoiding further damage to fragile media. To calculate hash of both the evidence and the image: Click […]<\/p>\n","protected":false},"author":8,"featured_media":3059,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[45],"tags":[],"yoast_head":"\nCalculate hash during imaging with Atola TaskForce forensic imager<\/title>\n<meta name=\"description\" content=\"Atola TaskForce supports hash calculation of both the evidence drive and the image in conjunction with forensic imaging. 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We have developed highly\u00a0flexible functionality to help optimize evidence acquisition process to fit one\u2019s internal procedures while avoiding further damage to fragile media.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.atola.com\/calculating-hash-during-imaging-2\/\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/AtolaTechnology\" \/>\n<meta property=\"article:published_time\" content=\"2019-01-03T14:08:30+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-10-26T12:45:36+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blog.atola.com\/wp-content\/uploads\/2018\/12\/1select-hash-posthash.png\" \/>\n\t<meta property=\"og:image:width\" content=\"2736\" \/>\n\t<meta property=\"og:image:height\" content=\"1824\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Yulia Samoteykina\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@atola_insight\" \/>\n<meta name=\"twitter:site\" content=\"@atola_insight\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Yulia Samoteykina\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/blog.atola.com\/calculating-hash-during-imaging-2\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/blog.atola.com\/calculating-hash-during-imaging-2\/\"},\"author\":{\"name\":\"Yulia Samoteykina\",\"@id\":\"https:\/\/atola.com\/blog\/#\/schema\/person\/f5faf6ed7d19bbc113d3d54fd30b6820\"},\"headline\":\"Calculating hash in the course of imaging\",\"datePublished\":\"2019-01-03T14:08:30+00:00\",\"dateModified\":\"2022-10-26T12:45:36+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/blog.atola.com\/calculating-hash-during-imaging-2\/\"},\"wordCount\":312,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/atola.com\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/blog.atola.com\/calculating-hash-during-imaging-2\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/atola.com\/blog\/wp-content\/uploads\/2018\/12\/1select-hash-posthash.png\",\"articleSection\":[\"Atola TaskForce\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/blog.atola.com\/calculating-hash-during-imaging-2\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blog.atola.com\/calculating-hash-during-imaging-2\/\",\"url\":\"https:\/\/blog.atola.com\/calculating-hash-during-imaging-2\/\",\"name\":\"Calculate hash during imaging with Atola TaskForce forensic imager\",\"isPartOf\":{\"@id\":\"https:\/\/atola.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blog.atola.com\/calculating-hash-during-imaging-2\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blog.atola.com\/calculating-hash-during-imaging-2\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/atola.com\/blog\/wp-content\/uploads\/2018\/12\/1select-hash-posthash.png\",\"datePublished\":\"2019-01-03T14:08:30+00:00\",\"dateModified\":\"2022-10-26T12:45:36+00:00\",\"description\":\"Atola TaskForce supports hash calculation of both the evidence drive and the image in conjunction with forensic imaging. 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