Knowledge (XXG)

Man-in-the-middle attack

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80:, in which the attacker makes independent connections with the victims and relays messages between them to make them believe they are talking directly to each other over a private connection, when in fact the entire conversation is controlled by the attacker. In this scenario, the attacker must be able to intercept all relevant messages passing between the two victims and inject new ones. This is straightforward in many circumstances; for example, an attacker within range of a 105: 345:. To detect potential attacks, parties check for discrepancies in response times. For example: Say that two parties normally take a certain amount of time to perform a particular transaction. If one transaction, however, were to take an abnormal length of time to reach the other party, this could be indicative of a third party's interference inserting additional latency in the transaction. 310:, in which both the server and the client validate the other's communication, covers both ends of a MITM attack. If the server or client's identity is not verified or deemed as invalid, the session will end. However, the default behavior of most connections is to only authenticate the server, which means mutual authentication is not always employed and MITM attacks can still occur. 323:(HPKP), sometimes called "certificate pinning", helps prevent a MITM attack in which the certificate authority itself is compromised, by having the server provide a list of "pinned" public key hashes during the first transaction. Subsequent transactions then require one or more of the keys in the list must be used by the server in order to authenticate that transaction. 317:), or recorded attestments such as audio/visual recordings of a public key hash are used to ward off MITM attacks, as visual media is much more difficult and time-consuming to imitate than simple data packet communication. However, these methods require a human in the loop in order to successfully initiate the transaction. 87:
As it aims to circumvent mutual authentication, a MITM attack can succeed only when the attacker impersonates each endpoint sufficiently well to satisfy their expectations. Most cryptographic protocols include some form of endpoint authentication specifically to prevent MITM attacks. For example,
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This example shows the need for Alice and Bob to have a means to ensure that they are truly each using each other's public keys, and not the public key of an attacker. Otherwise, such attacks are generally possible, in principle, against any message sent using public-key technology.
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wishes to intercept the conversation to eavesdrop (breaking confidentiality) with the option to deliver a false message to Bob under the guise of Alice (breaking non-repudiation). Mallory would perform a man-in-the-middle attack as described in the following sequence of events.
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surveillance device that mimics a wireless carrier cell tower in order to force all nearby mobile phones and other cellular data devices to connect to it. The tracker relays all communications back and forth between cellular phones and cell towers.
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access to its customers' encrypted browser traffic. Nokia responded by saying that the content was not stored permanently, and that the company had organizational and technical measures to prevent access to private information.
306:(CA). If the original key to authenticate this CA has not been itself the subject of a MITM attack, then the certificates issued by the CA may be used to authenticate the messages sent by the owner of that certificate. Use of 278:
All cryptographic systems that are secure against MITM attacks provide some method of authentication for messages. Most require an exchange of information (such as public keys) in addition to the message over a
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Sasikaladevi, N. and D. Malathi. 2019. “Energy Efficient Lightweight Mutual Authentication Protocol (REAP) for MBAN Based on Genus-2 Hyper-Elliptic Curve.” Wireless Personal Communications 109(4):2471–88.
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from what is suspected to be an attack can be analyzed in order to determine whether there was an attack and, if so, determine the source of the attack. Important evidence to analyze when performing
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MITM attacks can be prevented or detected by two means: authentication and tamper detection. Authentication provides some degree of certainty that a given message has come from a legitimate source.
887: 1027: 355:. Protocols based on quantum cryptography typically authenticate part or all of their classical communication with an unconditionally secure authentication scheme. As an example 1461: 1415: 232:
However, because it was actually encrypted with Mallory's key, Mallory can decrypt it, read it, modify it (if desired), re-encrypt with Bob's key, and forward it to Bob:
1322: 287:, have been developed with different security requirements for the secure channel, though some have attempted to remove the requirement for any secure channel at all. 574: – a cryptographic guarantee of the authenticity of a text, usually the result of a calculation only the author is expected to be able to perform. 1056: 909:"Development of field programmable gate array–based encryption module to mitigate man-in-the-middle attack for nuclear power plant data communication network" 73:
between two parties who believe that they are directly communicating with each other, as the attacker has inserted themselves between the two user parties.
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against MITM attacks. In such structures, clients and servers exchange certificates which are issued and verified by a trusted third party called a
942:"Detection of man-in-the-middle attacks using physical layer wireless security techniques: Man-in-the-middle attacks using physical layer security" 1167: 341:
Latency examination can potentially detect the attack in certain situations, such as with long calculations that lead into tens of seconds like
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extends the DNS protocol to use signatures to authenticate DNS records, preventing simple MITM attacks from directing a client to a malicious
1388: 1190: 792: 619: 1349: 1031: 522: 1838: 1437: 472:, a wireless communication protocol, has also been susceptible to man-in-the-middle attacks due to its wireless transmission of data. 1843: 1802: 1493: 1458: 1690: 756: 1833: 1517: 1405: 1326: 1756: 518:
uses MITM attacks to inject JavaScript code to 3rd party web pages, showing their own ads and messages on top of the pages
299: 342: 1070: 550: – the plot against Elizabeth I of England, where Francis Walsingham intercepted the correspondence. 1776: 568: – the art of deciphering encrypted messages with incomplete knowledge of how they were encrypted. 544: – a British radio transmitter used for World War II "intrusion" operations, an early MITM attack. 538:– a technique by which an attacker sends Address Resolution Protocol messages onto a local area network 356: 1644: 291: 267: 32: 1145:
Heinrich, Stuart (November 28, 2013). "Public Key Infrastructure based on Authentication of Media Attestments".
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Callegati, Franco; Cerroni, Walter; Ramilli, Marco (2009). "Man-in-the-Middle Attack to the HTTPS Protocol".
598: – a cryptographic protocol for establishing a key in which both parties can have confidence. 1654: 320: 819: 586: – a specific protocol to circumvent a MITM attack when the keys may have been compromised. 1705: 1532: 1097: 607: 595: 436: 420: 400: 284: 1215: 1486: 784: 640: – Cyber attack in which a person or program successfully masquerades as another by falsifying data 613: 394: 307: 303: 93: 81: 77: 888:"From cookie theft to BEC: Attackers use AiTM phishing sites as entry point to further financial fraud" 1812: 1807: 1766: 1695: 1553: 625: 559: 348: 211:
Alice encrypts a message with what she believes to be Bob's key, thinking that only Bob can read it:
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Mallory replaces Bob's key with her own, and relays this to Alice, claiming that it is Bob's key:
1746: 1583: 1563: 1196: 1146: 1115: 1008: 601: 583: 485: 352: 70: 1438:"Comcast using man-in-the-middle attack to warn subscribers of potential copyright infringement" 873: 592: – how to manage cryptographic keys, including generation, exchange and storage. 1771: 1725: 1634: 1384: 1296: 1186: 1175:
2009 Third International Conference on Emerging Security Information, Systems and Technologies
788: 616: – how communicating parties establish confidence in one another's identities. 571: 553: 371: 46: 28: 1786: 1751: 1479: 1376: 1178: 1107: 1000: 953: 920: 760: 577: 807:
capability from the server response, they can easily downgrade the connection to plaintext.
775: 722: 610: – a similar attack, giving only regular access to a communication channel. 1781: 1720: 1465: 643: 637: 104: 845: 723:"Monsters in the Middleboxes: Introducing Two New Tools for Detecting HTTPS Interception" 777:
Why TLS Is Better Without STARTTLS: A Security Analysis of STARTTLS in the Email Context
482: – the first public implementation of MITM attacks against SSL and SSHv1 1741: 1715: 1522: 941: 774:
Poddebniak, Damian; Ising, Fabian; Böck, Hanno; Schinzel, Sebastian (August 13, 2021).
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hosting a network without encryption could insert themselves as a man in the middle.
1200: 1012: 628: – the use of quantum mechanics to provide security in cryptography. 1639: 1558: 1119: 850: 535: 510: 509:
Content Gateway – used to perform inspection of SSL traffic at the
451: 42: 634: – a way of communicating resistant to interception and tampering. 1057:"Comcast still uses MITM javascript injection to serve unwanted ads and messages" 150:
Mallory relays this message to Bob; Bob cannot tell it is not really from Alice:
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Whether other clients, elsewhere on the Internet, received the same certificate
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Merkle, Ralph C (April 1978). "Secure Communications Over Insecure Channels".
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withdrew its mobile phone apps following concern about MITM vulnerabilities.
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2012 International Conference on Computing, Communication and Applications
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protocol that requires an adversary with a man-in-the-middle position.
622: – a protocol for establishing a key using a password. 1624: 1604: 1599: 957: 495: 479: 1350:"Here's Why Equifax Yanked Its Apps From Apple And Google Last Week" 1151: 313:
Attestments, such as verbal communications of a shared value (as in
580: – attack used against full disk encryption systems 351:, in theory, provides tamper-evidence for transactions through the 1323:"Nokia: Yes, we decrypt your HTTPS data, but don't worry about it" 975:"Comcast continues to inject its own code into websites you visit" 443: 384: 253:
Bob thinks that this message is a secure communication from Alice.
1471: 1028:"How to defend yourself against MITM or Man-in-the-middle attack" 1410: 314: 1475: 475:
Other notable real-life implementations include the following:
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Alice sends a message to Bob, which is intercepted by Mallory:
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In 2011, a security breach of the Dutch certificate authority
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can authenticate one or both parties using a mutually trusted
1261:"Florida Cops' Secret Weapon: Warrantless Cellphone Tracking" 1289:"DigiNotar Files for Bankruptcy in Wake of Devastating Hack" 739:
Usable Authentication Ceremonies in Secure Instant Messaging
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merely shows evidence that a message may have been altered.
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Elakrat, Mohamed Abdallah; Jung, Jae Cheon (June 1, 2018).
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where the attacker secretly relays and possibly alters the
1369:"Analysis of Bluetooth threats and v4.0 security features" 556: – the design of secure computer systems. 1168:"Detecting Man-in-the-Middle Attacks by Precise Timing" 450:
was revealed to be decrypting HTTPS traffic on Nokia's
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Whether the certificate has been signed by a trusted
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Wang, Le; Wyglinski, Alexander M. (October 1, 2014).
1406:"NSA disguised itself as Google to spy, say reports" 1071:"diffie hellman - MiTM on RSA public key encryption" 1795: 1734: 1678: 1592: 1546: 1510: 405:Whether the certificate has been changed recently 1367:Sandhya, S; Devi, K A Sumithra (February 2012). 1234:"Network Forensic Analysis of SSL MITM Attacks" 562: – a man-in-the-middle exploit. 108:An illustration of the man-in-the-middle attack 1487: 1348:Weissman, Cale Guthrie (September 15, 2017). 1124:Received August, 1975; revised September 1977 721:Gabbi Fisher; Luke Valenta (March 18, 2019). 646: – a downgrade attack on the 604: – a type of web browser MITM 8: 946:Wireless Communications and Mobile Computing 390:Whether the certificate has been self signed 757:"Fact Sheet: Machine-in-the-Middle Attacks" 1494: 1480: 1472: 1216:"5. Unconditionally secure authentication" 745:(Dipl.-Ing.). Technische Universität Wien. 1150: 1101: 924: 1459:Finding Hidden Threats by Decrypting SSL 1166:Aziz, Benjamin; Hamilton, Geoff (2009). 103: 1418:from the original on September 15, 2013 713: 661: 161:"Hi Bob, it's Alice. Give me your key." 136:"Hi Bob, it's Alice. Give me your key." 76:One example of a MITM attack is active 1538:Timeline of computer viruses and worms 435:resulted in the fraudulent issuing of 171:Bob responds with his encryption key: 1051: 1049: 986: 984: 969: 967: 7: 1404:Moyer, Edward (September 12, 2013). 1026:Tanmay Patange (November 10, 2013). 993:IEEE Security & Privacy Magazine 620:Password-authenticated key agreement 523:Kazakhstan man-in-the-middle attack 1287:Zetter, Kim (September 20, 2011). 913:Nuclear Engineering and Technology 820:"Manipulator-in-the-middle attack" 736:Fassl, Matthias (April 23, 2018). 25: 1803:Computer and network surveillance 1321:Meyer, David (January 10, 2013). 399:Whether the certificate has been 374:on a suspected attack includes: 1518:Comparison of computer viruses 1238:NETRESEC Network Security Blog 785:30th USENIX Security Symposium 283:. Such protocols, often using 1: 1757:Data loss prevention software 1325:. Gigaom, Inc. Archived from 1259:Zetter, Kim (March 3, 2014). 300:Transmission Control Protocol 801:Meddler-in-the-Middle (MitM) 357:Wegman-Carter authentication 1075:Cryptography Stack Exchange 218:"Meet me at the bus stop!" 116:wishes to communicate with 1860: 1777:Intrusion detection system 1381:10.1109/iccca.2012.6179149 387:certificate of the server 26: 1839:Computer network security 1645:Privacy-invasive software 1464:October 18, 2017, at the 1183:10.1109/SECURWARE.2009.20 1090:Communications of the ACM 926:10.1016/j.net.2018.01.018 682:manipulator-in-the-middle 292:public key infrastructure 38:Form of message tampering 33:Meet-in-the-middle attack 1844:Transport Layer Security 854:. Mozilla. July 13, 2022 378:IP address of the server 368:Captured network traffic 296:Transport Layer Security 27:Not to be confused with 1655:Rogue security software 694:adversary-in-the-middle 488:HTTP(S) diagnostic tool 321:HTTP Public Key Pinning 285:key-agreement protocols 243:"Meet me at the park!" 1691:Classic Mac OS viruses 1533:List of computer worms 1468:(PDF). SANS Institute. 1375:. IEEE. pp. 1–4. 874:"Person-in-the-middle" 608:Man-on-the-side attack 596:Key-agreement protocol 542:Aspidistra transmitter 421:Stingray phone tracker 381:DNS name of the server 109: 1834:Cryptographic attacks 1112:10.1145/359460.359473 824:OWASP Community Pages 803:attacker removes the 678:meddler-in-the-middle 674:machine-in-the-middle 670:monster-in-the-middle 614:Mutual authentication 454:, giving the company 395:certificate authority 308:mutual authentication 304:certificate authority 262:Defense and detection 107: 94:certificate authority 1813:Operation: Bot Roast 1444:. November 23, 2015. 1059:. December 28, 2016. 1034:on November 24, 2013 977:. December 11, 2017. 686:person-in-the-middle 626:Quantum cryptography 560:Cookiemonster attack 349:Quantum cryptography 1762:Defensive computing 1679:By operating system 1005:10.1109/MSP.2009.12 876:. October 11, 2020. 1747:Antivirus software 1593:Malware for profit 1564:Man-in-the-browser 1511:Infectious malware 1214:Cederlöf, Jörgen. 1177:. pp. 81–86. 826:. OWASP Foundation 602:Man-in-the-browser 584:Interlock protocol 353:no-cloning theorem 110: 82:Wi-Fi access point 1821: 1820: 1772:Internet security 1726:HyperCard viruses 1635:Keystroke logging 1625:Fraudulent dialer 1569:Man-in-the-middle 1390:978-1-4673-0273-9 1192:978-0-7695-3668-2 794:978-1-939133-24-3 763:. March 24, 2020. 572:Digital signature 554:Computer security 494:impersonation of 415:Notable instances 372:network forensics 363:Forensic analysis 51:man-in-the-middle 47:computer security 29:Man-in-the-Mobile 16:(Redirected from 1851: 1787:Network security 1752:Browser security 1496: 1489: 1482: 1473: 1446: 1445: 1434: 1428: 1427: 1425: 1423: 1401: 1395: 1394: 1364: 1358: 1357: 1345: 1339: 1338: 1336: 1334: 1329:on April 8, 2019 1318: 1312: 1311: 1309: 1307: 1284: 1278: 1277: 1275: 1273: 1256: 1250: 1249: 1247: 1245: 1240:. March 27, 2011 1230: 1224: 1223: 1211: 1205: 1204: 1172: 1163: 1157: 1156: 1154: 1142: 1136: 1133: 1127: 1126: 1105: 1085: 1079: 1078: 1067: 1061: 1060: 1053: 1044: 1043: 1041: 1039: 1030:. Archived from 1023: 1017: 1016: 988: 979: 978: 971: 962: 961: 958:10.1002/wcm.2527 937: 931: 930: 928: 904: 898: 897: 896:. July 12, 2022. 884: 878: 877: 870: 864: 863: 861: 859: 842: 836: 835: 833: 831: 816: 810: 809: 787:. p. 4366. 782: 771: 765: 764: 761:Internet Society 753: 747: 746: 744: 733: 727: 726: 718: 701: 668:Also known as a 666: 578:Evil maid attack 337:Tamper detection 268:Tamper detection 248: 245:→     241: 237: 227: 223: 220:→     216: 206: 202: 197:    ← 196: 186: 181:    ← 180: 176: 166: 163:→     159: 155: 145: 141: 138:→     134: 21: 1859: 1858: 1854: 1853: 1852: 1850: 1849: 1848: 1824: 1823: 1822: 1817: 1796:Countermeasures 1791: 1782:Mobile security 1730: 1721:Palm OS viruses 1686:Android malware 1674: 1588: 1584:Zombie computer 1542: 1506: 1500: 1466:Wayback Machine 1455: 1450: 1449: 1436: 1435: 1431: 1421: 1419: 1403: 1402: 1398: 1391: 1366: 1365: 1361: 1347: 1346: 1342: 1332: 1330: 1320: 1319: 1315: 1305: 1303: 1286: 1285: 1281: 1271: 1269: 1258: 1257: 1253: 1243: 1241: 1232: 1231: 1227: 1213: 1212: 1208: 1193: 1170: 1165: 1164: 1160: 1144: 1143: 1139: 1134: 1130: 1103:10.1.1.364.5157 1087: 1086: 1082: 1069: 1068: 1064: 1055: 1054: 1047: 1037: 1035: 1025: 1024: 1020: 990: 989: 982: 973: 972: 965: 939: 938: 934: 906: 905: 901: 886: 885: 881: 872: 871: 867: 857: 855: 844: 843: 839: 829: 827: 818: 817: 813: 795: 780: 773: 772: 768: 755: 754: 750: 742: 735: 734: 730: 720: 719: 715: 710: 705: 704: 667: 663: 658: 653: 644:Terrapin attack 638:Spoofing attack 531: 417: 365: 339: 276: 264: 246: 239: 235: 225: 221: 214: 204: 200: 194: 184: 178: 174: 164: 157: 153: 143: 139: 132: 102: 39: 36: 23: 22: 15: 12: 11: 5: 1857: 1855: 1847: 1846: 1841: 1836: 1826: 1825: 1819: 1818: 1816: 1815: 1810: 1805: 1799: 1797: 1793: 1792: 1790: 1789: 1784: 1779: 1774: 1769: 1764: 1759: 1754: 1749: 1744: 1742:Anti-keylogger 1738: 1736: 1732: 1731: 1729: 1728: 1723: 1718: 1716:Mobile malware 1713: 1708: 1703: 1698: 1693: 1688: 1682: 1680: 1676: 1675: 1673: 1672: 1667: 1662: 1657: 1652: 1647: 1642: 1637: 1632: 1627: 1622: 1617: 1612: 1607: 1602: 1596: 1594: 1590: 1589: 1587: 1586: 1581: 1576: 1571: 1566: 1561: 1556: 1550: 1548: 1544: 1543: 1541: 1540: 1535: 1530: 1525: 1523:Computer virus 1520: 1514: 1512: 1508: 1507: 1501: 1499: 1498: 1491: 1484: 1476: 1470: 1469: 1454: 1453:External links 1451: 1448: 1447: 1429: 1396: 1389: 1359: 1340: 1313: 1279: 1251: 1225: 1206: 1191: 1158: 1137: 1128: 1096:(4): 294–299. 1080: 1062: 1045: 1018: 980: 963: 952:(4): 408–426. 932: 919:(5): 780–787. 899: 879: 865: 837: 811: 793: 766: 748: 728: 712: 711: 709: 706: 703: 702: 660: 659: 657: 654: 652: 651: 641: 635: 632:Secure channel 629: 623: 617: 611: 605: 599: 593: 590:Key management 587: 581: 575: 569: 563: 557: 551: 548:Babington Plot 545: 539: 532: 530: 527: 526: 525: 519: 513: 504: 498: 489: 483: 448:Xpress Browser 425:cellular phone 416: 413: 412: 411: 410: 409: 406: 403: 397: 391: 382: 379: 364: 361: 343:hash functions 338: 335: 281:secure channel 275: 274:Authentication 272: 263: 260: 255: 254: 251: 250: 249: 238:    230: 229: 228: 224:    209: 208: 207: 203:    189: 188: 187: 177:    169: 168: 167: 156:    148: 147: 146: 142:    101: 98: 71:communications 63:on-path attack 37: 24: 14: 13: 10: 9: 6: 4: 3: 2: 1856: 1845: 1842: 1840: 1837: 1835: 1832: 1831: 1829: 1814: 1811: 1809: 1806: 1804: 1801: 1800: 1798: 1794: 1788: 1785: 1783: 1780: 1778: 1775: 1773: 1770: 1768: 1765: 1763: 1760: 1758: 1755: 1753: 1750: 1748: 1745: 1743: 1740: 1739: 1737: 1733: 1727: 1724: 1722: 1719: 1717: 1714: 1712: 1709: 1707: 1706:MacOS malware 1704: 1702: 1701:Linux malware 1699: 1697: 1694: 1692: 1689: 1687: 1684: 1683: 1681: 1677: 1671: 1668: 1666: 1663: 1661: 1658: 1656: 1653: 1651: 1648: 1646: 1643: 1641: 1638: 1636: 1633: 1631: 1628: 1626: 1623: 1621: 1620:Form grabbing 1618: 1616: 1613: 1611: 1608: 1606: 1603: 1601: 1598: 1597: 1595: 1591: 1585: 1582: 1580: 1577: 1575: 1572: 1570: 1567: 1565: 1562: 1560: 1557: 1555: 1552: 1551: 1549: 1545: 1539: 1536: 1534: 1531: 1529: 1528:Computer worm 1526: 1524: 1521: 1519: 1516: 1515: 1513: 1509: 1504: 1497: 1492: 1490: 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624: 621: 618: 615: 612: 609: 606: 603: 600: 597: 594: 591: 588: 585: 582: 579: 576: 573: 570: 567: 566:Cryptanalysis 564: 561: 558: 555: 552: 549: 546: 543: 540: 537: 534: 533: 528: 524: 520: 517: 514: 512: 508: 505: 502: 499: 497: 493: 490: 487: 484: 481: 478: 477: 476: 473: 471: 467: 465: 460: 457: 453: 452:proxy servers 449: 445: 440: 438: 434: 429: 426: 422: 414: 407: 404: 402: 398: 396: 392: 389: 388: 386: 383: 380: 377: 376: 375: 373: 369: 362: 360: 358: 354: 350: 346: 344: 336: 334: 332: 328: 324: 322: 318: 316: 311: 309: 305: 301: 298:, may harden 297: 293: 288: 286: 282: 273: 271: 269: 261: 259: 252: 244: 234: 233: 231: 219: 213: 212: 210: 199: 193: 192: 190: 183: 173: 172: 170: 162: 152: 151: 149: 137: 131: 130: 128: 127: 126: 123: 120:. Meanwhile, 119: 115: 106: 99: 97: 95: 91: 85: 83: 79: 78:eavesdropping 74: 72: 68: 64: 60: 56: 52: 48: 44: 34: 30: 19: 18:Hijack attack 1579:Trojan horse 1568: 1559:Clickjacking 1441: 1432: 1420:. Retrieved 1409: 1399: 1372: 1362: 1354:Fast Company 1353: 1343: 1331:. Retrieved 1327:the original 1316: 1304:. Retrieved 1292: 1282: 1270:. Retrieved 1264: 1254: 1242:. Retrieved 1237: 1228: 1219: 1209: 1174: 1161: 1140: 1131: 1123: 1093: 1089: 1083: 1074: 1065: 1038:November 25, 1036:. Retrieved 1032:the original 1021: 996: 992: 949: 945: 935: 916: 912: 902: 891: 882: 868: 856:. Retrieved 851:MDN Web Docs 849: 840: 828:. 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Index

Hijack attack
Man-in-the-Mobile
Meet-in-the-middle attack
cryptography
computer security
cyberattack
communications
eavesdropping
Wi-Fi access point
TLS
certificate authority

Alice
Bob
Mallory
Tamper detection
secure channel
key-agreement protocols
public key infrastructure
Transport Layer Security
Transmission Control Protocol
certificate authority
mutual authentication
ZRTP
HTTP Public Key Pinning
DNSSEC
IP address
hash functions
Quantum cryptography
no-cloning theorem

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