| CPC H04L 9/3247 (2013.01) [H04L 9/3236 (2013.01); H04L 9/0894 (2013.01); H04L 9/3268 (2013.01); H04L 9/50 (2022.05); H04L 2209/68 (2013.01)] | 17 Claims |

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1. A method performed by a computing system, comprising:
generating a first block comprising first content;
creating a first hash in the first block, the first hash identifies a second block to which the first block is appended, wherein the first block is created with the first hash or amended to include the first hash;
creating a first pointer in the first block identifying a location of the second block;
signing attributes of the first block and adding a first signature value to the first block;
creating a second hash in the second block identifying the first block;
creating a second pointer in the second block identifying a location of the first block; and
signing attributes of the second block and adding a second signature value to the second block.
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